MEMORANDUM. According to the final ballot results, all ballot items received the necessary affirmative votes to pass ballot.

Transcription

1 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: MEMORANDUM To: NEC Code-Making Panel 14 From: Kimberly Shea, Project Administrator Date: April 16, 2015 Subject: NEC First Draft TC FINAL Ballot Results (A2016) According to the final ballot results, all ballot items received the necessary affirmative votes to pass ballot. 16 Members Eligible to Vote 1 Not Returned (Cahill) 7 Members voted Affirmative with Comment on one or more Revisions (Ankele, Bernsen, Blais, Lawrence, Neagle, Wechsler and Wirfs) 9 Members voted Negative on one or more Revisions (Alexander, Ankele, Blais, Burns, Kines, Lawrence, McBride, Simmons and Wechsler) 0 Members Abstained on one or more Revisions The attached report shows the number of affirmative, negative, and abstaining votes as well as the explanation of the vote for each first revision. There are two criteria necessary for each first revision to pass ballot: (1) simple majority and (2) affirmative 2 / 3 vote. The mock examples below show how the calculations are determined. (1) Example for Simple Majority: Assuming there are 20 vote eligible committee members, 11 affirmative votes are required to pass ballot. (Sample calculation: 20 members eligible to vote 2 = = 11) (2) Example for Affirmative 2 / 3 : Assuming there are 20 vote eligible committee members and 1 member did not return their ballot and 2 members abstained, the number of affirmative votes required would be 12. (Sample calculation: 20 members eligble to vote 1 not returned 2 abstentions = 17 x 0.66 = = 12 ) As always please feel free to contact me if you have any questions.

2 First Revision No NFPA [ Definition: Dusttight. ] Dusttight. Constructed Enclosures constructed so that dust will not enter the enclosing case under specified test conditions. Informational Note No. 1: Enclosure Types 3, 3S, 3SX, 4, 4X, 5, 6, 6P, 12, 12K, and 13, per ANSI/NEMA , Enclosures for Electrical Equipment, are considered dusttight and suitable for use in unclassified locations and in Class II, Division 2; Class III; and Zone 22 hazardous (classified) locations. Informational Note No. 2: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 13:34:47 EST 2015 Committee Statement Committee Statement: Response Message: The definition was revised to match the deleted definitions from and Informational note no. 1 was added to clarify which enclosure types are considered to be dusttight. Informational note no. 2 was relocated from the deleted definitions in and Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. of 270 4/16/ :12 AM

3 Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. At the end of informational note 1, add the phrase :"...where heat generating parts are not included within the enclosure." Wirfs, Mark C. None of 270 4/16/ :12 AM

4 First Revision No NFPA [ New Definition after Definition: Copper-Clad Aluminum Condu... ] Cord Connector [as applied to Hazardous (Classified) Locations]. A fitting intended to terminate a cord or cable to a box or similar device and reduce the strain at points of termination and may include an explosionproof, a dust-ignitionproof, or a flameproof seal. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:22:46 EST 2015 Committee Statement Committee Statement: The inclusion of TC-ER and TC-ER-HL as a wiring method in Articles 501, 502, 503, 505, and 506 requires a method of termination that currently is identified as a Cord Connector. The current term for this device, as used in the HazLoc industry and within the product standards, is cord connector, which should not be confused with the term also used by the wiring device industry, indicating a female electrical connector. The differentiation has been addressed by denoting (as applied to hazardous (classified) locations). The term is currently used (19) times in these articles. Response Message: Public Input No NFPA [Section No (B)(2)] Public Input No NFPA [Section No (C)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 1 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave of 270 4/16/ :12 AM

5 Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. McBride, William E. The term cord connector is used many times in the NEC for a wiring device. Defining that term differently for a product to be used in classified locations and also in unclassified locations is confusing. Wechsler, David B. While it is understood that confusion may exist with the term cord connector used in product standards it is felt that complete resolution resides not within the NEC, but in product standards. To reduce this impact it is strongly suggested that the term cord fitting be used since in fact the method of termination is incorporated often with a fitting. Therefore, the revised defined term should be as follows: 100 (new) Cord Fitting (as applied to Hazardous Classified Locations) A product intended to terminate a cord or cable to a box or similar device and reduce the strain at points of termination and may include an explosionproof, a dust-ignition proof, or a flameproof seal of 270 4/16/ :12 AM

6 First Revision No NFPA [ New Definition after Definition: Premises Wiring (System). ] Process Seal [as applied to Hazardous (Classified) Locations]. A seal between electrical systems and flammable or combustible process fluids where a failure could allow the migration of process fluids into the premises wiring system. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:34:05 EST 2015 Committee Statement Committee Statement: Response Message: The definition for process seal is contained in ANSI/ISA The term is used in multiple articles in Chapter 5. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy of 270 4/16/ :12 AM

7 Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. of 270 4/16/ :12 AM

8 of 270 4/16/ :12 AM First Revision No NFPA [ Section No [Excluding any Sub-Sections] ] For purposes of Articles 500 through 504 and Articles 510 through 516, the following definitions apply. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:38:15 EST 2015 Committee Statement Committee Statement: Response Message: All of the definitions in this section have been moved to Article 100 to comply with Section of the 2011 NEC Style Manual. Public Input No NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 10 Affirmative All 2 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B.

9 Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. For example "Combustible Dust. See Article 100 for definition." This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None Negative with Comment Burns, Dave The definitions were relocated based on direction from the TCC. Panel 14 followed this direction but is unaware if other panels followed suit. Consistancy within the document is important to the user. If the definitions are to be moved to Art. 100, some cross-reference should be provided for this code cycle. Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. McBride, William E. For this code cycle only, a cross-reference in to be relocated definitions in Art 100 is recommended in this location for sustained usability. The code panel is moving the definition without leaving a trail where the definition is relocated to article 100 and will result in confusion for the use of this article should refer users of the code to see Article 100 for definitions formerly located in Section of 270 4/16/ :12 AM

10 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Combustible Dust. ] Combustible Dust [as applied to Hazardous (Classified) Locations]. Dust particles that are 500 microns or smaller (material passing a U.S. No. 35 Standard Sieve as defined in ASTM E E 11-13, Standard Specification for Wire Cloth and Sieves for Testing Purposes), and present a fire or explosion hazard when dispersed and ignited in air. Informational Note: See ASTM E a E a, Standard Test Method for Explosibility of Dust Clouds, or ISO , Explosion protection systems Part 1: Determination of explosion indices of combustible dusts in air, for procedures for determining the explosibility of dusts. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 17:50:00 EST 2015 Committee Statement Committee Statement: The term "Combustible Dust" is used in Articles 500, 502, 504, 505, 506, and 516. The definition of this term has been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words (as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. References were updated. Response Message: Public Input No NFPA [Definition: Combustible Dust.] Public Input No NFPA [Definition: Combustible Dust.] Public Input No NFPA [Definition: Combustible Dust.] Public Input No NFPA [New Definition after Definition: Clothes Closet.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 1 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G.

11 Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Burns, Dave The definitions were relocated based on direction from the TCC. Panel 14 followed this direction but is unaware if other panels followed suit. Consistancy within the document is important to the user. If the definitions are to be moved to Art. 100, some cross-reference should be provided for this code cycle. Its is noted that corrections to the reference are not part of this negative comment. Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. McBride, William E. For this code cycle only, a cross-reference in to the relocated definitions in Art 100 is recommended in this location for sustained usability. The current plan will result in confusion for the use of this article should refer users of the code to see Article 100 for definitions formerly located in Section of 270 4/16/ :12 AM

12 First Revision No NFPA [ Definition: Combustible Gas Detection System. ] Combustible Gas Detection System [as applied to Hazardous (Classified) Locations]. A protection technique utilizing stationary gas detectors in industrial establishments. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:08:03 EST 2015 Committee Statement Committee Statement: The term Combustible Gas Detection System appears in Articles 500 and 505. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words (as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Combustible Gas Detection System.] Public Input No NFPA [New Definition after Definition: Communications Equipment.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. 1 of 270 4/16/ :12 AM

13 Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 2 of 270 4/16/ :12 AM

14 3 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Control Drawing. ] Control Drawing [as applied to Hazardous (Classified) Locations]. A drawing or other document provided by the manufacturer of the intrinsically safe or associated apparatus, or of the nonincendive field wiring apparatus or associated nonincendive field wiring apparatus, that details the allowed interconnections between the intrinsically safe and associated apparatus or between the nonincendive field wiring apparatus or associated nonincendive field wiring apparatus. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:15:55 EST 2015 Committee Statement Committee Statement: The term Control Drawing appears in Articles 500, 501, 503, 504, 505, and 506. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Control Drawing.] Public Input No NFPA [New Definition after Definition: Controller.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A.

15 Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 4 of 270 4/16/ :12 AM

16 5 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Dust-Ignitionproof. ] Dust-Ignitionproof [as applied to Hazardous (Classified) Locations]. Equipment enclosed in a manner that excludes dusts and does not permit arcs, sparks, or heat otherwise generated or liberated inside of the enclosure to cause ignition of exterior accumulations or atmospheric suspensions of a specified dust on or in the vicinity of the enclosure. Informational Note: For further information on dustignitionproof dust-ignitionproof enclosures, see Type 9 enclosure in ANSI/ NEMA ANSI/UL , Enclosures for Electrical Equipment, and ANSI/UL , Explosionproof and Dust-Ignitionproof Electrical Equipment for Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:20:22 EST 2015 Committee Statement Committee Statement: The term Dust-Ignitionproof appears in Articles 500, 502, and 506. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. The reference to ANSI/NEMA was deleted because Enclosure Type 9 is no longer in the scope of ANSI/NEMA 250. The references were updated. Response Message: Public Input No NFPA [Definition: Dust-Ignitionproof.] Public Input No NFPA [Definition: Dust-Ignitionproof.] Public Input No NFPA [New Definition after Definition: Dusttight.] Public Input No NFPA [Definition: Dust-Ignitionproof.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 3 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey

17 Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Remove the reference to ANSI/UL and strike out the title to NEMA 250. Lawrence, Jr., William G. The added text shown as "ANSI/UL 1202:2013" should not have been added. The text "Enclosures for Electrical Equipment, and" should have been deleted as it was the title of the deleted ANSI/NEMA 250. Wirfs, Mark C. None on this one. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 6 of 270 4/16/ :12 AM

18 First Revision No NFPA [ Definition: Dusttight. ] Dusttight. Enclosures constructed so that dust will not enter under specified test conditions. Informational Note: See ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:32:33 EST 2015 Committee Statement Committee Statement: The term is already defined in Article 100. Response Message: Public Input No NFPA [Definition: Dusttight.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan 7 of 270 4/16/ :12 AM

19 8 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. update the edition date to 2013 Wirfs, Mark C. None.

20 9 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Hermetically Sealed. ] Hermetically Sealed [as applied to Hazardous (Classified) Locations]. Equipment sealed against the entrance of an external atmosphere where the seal is made by fusion, for example, soldering, brazing, welding, or the fusion of glass to metal. Informational Note: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 13:49:02 EST 2015 Committee Statement Committee Statement: The term Hermetically Sealed appears in Articles 500, 501, 505, and 480. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Hermetically Sealed.] Public Input No NFPA [New Definition after Definition: Hoistway.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave

21 0 of 270 4/16/ :12 AM Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

22 1 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Purged and Pressurized. ] Purged and Pressurized [as applied to Hazardous (Classified) Locations]. The process of (1) purging, supplying an enclosure with a protective gas at a sufficient flow and positive pressure to reduce the concentration of any flammable gas or vapor initially present to an acceptable level; and (2) pressurization, supplying an enclosure with a protective gas with or without continuous flow at sufficient pressure to prevent the entrance of a flammable gas or vapor, a combustible dust, or an ignitible fiber. Informational Note: For further information, see ANSI/NFPA , Purged and Pressurized Enclosures for Electrical Equipment. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:13:26 EST 2015 Committee Statement Committee Statement: The term Purged and Pressurized appears in Articles 500, 501, 505, and 506. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words (as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable Response Message: Public Input No NFPA [Definition: Purged and Pressurized.] Public Input No NFPA [New Definition after Definition: Qualified Person.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J.

23 Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 2 of 270 4/16/ :12 AM

24 3 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Unclassified Locations. ] Unclassified Locations [as applied to Hazardous (Classified) Locations]. Locations determined to be neither Class I, Division 1; Class I, Division 2; Class I, Zone 0; Class I, Zone 1; Class I, Zone 2; Class II, Division 1; Class II, Division 2; Class III, Division 1; Class III, Division 2; Zone 20; Zone 21; Zone 22; or nor any combination thereof. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:17:15 EST 2015 Committee Statement Committee Statement: The term Unclassified Locations appears in Articles 500, 501, 502, 503, 504, 505, 506, 511, 513, 514, 516, and 400. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Unclassified Locations.] Public Input No NFPA [New Definition after Definition: Ungrounded.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A.

25 Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 4 of 270 4/16/ :12 AM

26 First Revision No NFPA [ Definitions (500.2): Nonincendiv... to Oil Immersi... ] Nonincendive Circuit [as applied to Hazardous (Classified) Locations]. A circuit, other than field wiring, in which any arc or thermal effect produced under intended operating conditions of the equipment, is not capable, under specified test conditions, of igniting the flammable gas air, vapor air, or dust air mixture. Informational Note: Conditions are described in ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Nonincendive Component [as applied to Hazardous (Classified) Locations]. A component having contacts for making or breaking an incendive circuit and the contacting mechanism is constructed so that the component is incapable of igniting the specified flammable gas air or vapor air mixture. The housing of a nonincendive component is not intended to exclude the flammable atmosphere or contain an explosion. Informational Note: For further information, see ANSI/ISA , NonincendiveElectrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Nonincendive Equipment [as applied to Hazardous (Classified) Locations]. Equipment having electrical/electronic circuitry that is incapable, under normal operating conditions, of causing ignition of a specified flammable gas air, vapor air, or dust air mixture due to arcing or thermal means. Informational Note: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Nonincendive Field Wiring [as applied to Hazardous (Classified) Locations]. Wiring that enters or leaves an equipment enclosure and, under normal operating conditions of the equipment, is not capable, due to arcing or thermal effects, of igniting the flammable gas air, vapor air, or dust air mixture. Normal operation includes opening, shorting, or grounding the field wiring. Nonincendive Field Wiring Apparatus [as applied to Hazardous (Classified) Locations]. Apparatus intended to be connected to nonincendive field wiring. Informational Note: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Oil Immersion [as applied to Hazardous (Classified) Locations]. Electrical equipment immersed in a protective liquid in such a way that an explosive atmosphere that may be above the liquid or outside the enclosure cannot be ignited. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:00:18 EST 2015 Committee Statement Committee Statement: The term Nonincendive Circuit appears in Articles 500, 501, 502, and 506. Nonincendive Component appears in Articles 500 and 501. Nonincendive Equipment appears in Articles 500, 506, and of 270 4/16/ :12 AM

27 6 of 270 4/16/ :12 AM Nonincendive Field Wiring appears in Articles 500, 501, 502, 503, 504, and 506. Nonincendive Field Wiring Apparatus appears in Article 500 and in the definition of Control Drawing which will be located in Article 100, if a submitted PI is approved. Oil Immersion appears in Articles 500 and 505. The definitions are currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable Response Message: Public Input No NFPA [Definition: Nonincendive Component.] Public Input No NFPA [New Definition after Definition: Nonlinear Load.] Public Input No NFPA [Definition: Nonincendive Equipment.] Public Input No NFPA [Definition: Oil Immersion.] Public Input No NFPA [Definition: Nonincendive Field Wiring.] Public Input No NFPA [Definition: Nonincendive Circuit.] Public Input No NFPA [Definition: Nonincendive Field Wiring Apparatus.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Add informational note to the definition for Nonincendive Field Wiring that referenced ISA Wirfs, Mark C. None Negative with Comment Kines, Haywood

28 7 of 270 4/16/ :12 AM Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

29 First Revision No NFPA [ Section No (B) ] (B) Reference Standards. Important information relating to topics covered in Chapter 5 may be found in other publications. Informational Note No. 1: It is important that the authority having jurisdiction be familiar with recorded industrial experience as well as Familiarity with the standards of the National Fire Protection Association (NFPA), the American Petroleum Institute (API), and the International Society of Automation (ISA), that as well as relevant industrial experience, may be of use in the classification of various locations, the determination of adequate ventilation, and the protection against static electricity and lightning hazards. Informational Note No. 2: For further information on the classification of locations, see NFPA , Flammable and Combustible Liquids Code; NFPA , Standard for Drycleaning Plants; NFPA , Standard for Spray Application Using Flammable or Combustible Materials; NFPA , Standard for Dipping and Coating Processes Using Flammable or Combustible Liquids; NFPA , Standard for the Manufacture of Organic Coatings; NFPA , Standard for Solvent Extraction Plants; NFPA , Standard on Fire Protection for Laboratories Using Chemicals; NFPA , Compressed Gases and Cryogenic Fluids Code; NFPA , Liquefied Petroleum Gas Code; NFPA , Utility LP-Gas Plant Code; NFPA , Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas; NFPA , Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas; NFPA , Standard for Fire Protection in Wastewater Treatment and Collection Facilities; ANSI/API RP , Recommended Practice for Classification of Locations of Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2; ISA , Area Classification in Hazardous (Classified) Dust Locations. Informational Note No. 3: For further information on protection against static electricity and lightning hazards in hazardous (classified) locations, see NFPA , Recommended Practice on Static Electricity; NFPA , Standard for the Installation of Lightning Protection Systems; and API RP , Protection Against Ignitions Arising Out of Static Lightning and Stray Currents. Informational Note No. 4: For further information on ventilation, see NFPA , Flammable and Combustible Liquids Code; and ANSI/API RP , Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division 1 and Division 2. Informational Note No. 5: For further information on electrical systems for hazardous (classified) locations on offshore oil- and gas-producing platforms, see ANSI/API RP 14F , Recommended Practice for Design and Installation of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Division 1 and Division 2 Locations. Informational Note No. 6: Portable or transportable equipment having self-contained power supplies, such as battery-operated equipment, could potentially become an ignition source in hazardous (classified) locations. See ANSI/ISA , Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: 8 of 270 4/16/ :12 AM

30 9 of 270 4/16/ :12 AM Submittal Date: Wed Jan 14 10:33:16 EST 2015 Committee Statement Committee Statement: The informational note makes a recommendation. Section of the 2011 NEC Style Manual states that informational notes shall not contain recommendations. The text is modified to present the information as factual, rather than a recommendation. References in the informational notes were updated. Informational note no. 8 was added to (B) to retain the information on portable and transportable equipment from the definition of "Electrical and Electronic Equipment," which has been deleted. Response Message: Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

31 0 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Classifications of Locations General. Locations shall be classified depending on the properties of the flammable gas, flammable liquid produced vapor, combustible liquid produced vapors, combustible dusts, or fibers/flyings that may be present, and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification. Where pyrophoric materials are the only materials used or handled, these locations are outside the scope of this article. Informational Note No. 1: Through the exercise of ingenuity in the layout of electrical installations for hazardous (classified) locations, it is frequently possible to locate much of the equipment in a reduced level of classification or in an unclassified location and, thus, to reduce the amount of special equipment required. Refrigerant machinery rooms containing ammonia refrigeration systems that are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system that alarms at 1000 ppm may be classified as unclassified locations. Rooms and refrigerated areas containing ammonia refrigeration systems that are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system that alarms at 1000 ppm may be classified as unclassified locations. Informational Note No. 2: For further information regarding classification and ventilation of areas involving ammonia, see ANSI/ASHRAE , Safety Standard for Refrigeration Systems Code for Mechanical Refrigeration, and ANSI/CGA G , Safety Requirements for the Storage and Handling of Anhydrous Ammonia. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 10:47:31 EST 2015 Committee Statement Committee Statement: Section 500.5(A) is applicable to Sections 500.5(B), 500.5(C), and 500.5(D). Therefore, the text of 500.5(A) has been retitled as General. Standards name and date were updated. ANSI/CGA G2.1 reference was removed, as it is not applicable to ammonia systems. The revision clarifies that areas containing ammonia refrigeration may be classified as unclassified locations based on the use of gas detection and adequate ventilation, in order to harmonize with the ASHRAE standard. Response Message: Public Input No. 70-NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters

32 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Neagle, Jeremy The phrase 'mechanical ventilation that operates continuously or is initiated by a detection system that alarms at 1000 ppm' may not provide the user with enough information to select, install and operate a gas detection system adequate for the task. Consider including a reference to 505.8(I) or ANSI/ISA and ANSI/ISA TR for guidance on gas detection systems. Wirfs, Mark C. The Task Group developed the change of the (A) title to GENERAL based on applicability and context coverage. They FAILED to do the SAME for (A) and 506.5(A). The same logic and style manual basis applies and this should have bee ALSO changed. 1 of 270 4/16/ :12 AM

33 First Revision No NFPA [ Section No [Excluding any Sub-Sections] ] For purposes of testing, approval, and area classification, various air mixtures (not oxygen-enriched) shall be grouped in accordance with 500.6(A) and (B). Exception: Equipment identified for a specific gas, vapor, or dust, or fiber/flying. Informational Note: This grouping is based on the characteristics of the materials. Facilities are available for testing and identifying equipment for use in the various atmospheric groups. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:09:21 EST 2015 Committee Statement Committee Statement: The revision adds fibers/flyings to the list, which was missing. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan 2 of 270 4/16/ :12 AM

34 3 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Remove the reference to dust and fibers/flyings as there are no testing, approval or area classification requirements that address one specific dust or fiber/flying. Wirfs, Mark C. None. Negative with Comment Lawrence, Jr., William G. "or fiber/flying" should not be added. "dust" should be deleted. 1. The product standards do not include such a product marking. a. ANSI/ISA only addresses marking for a specific gas or vapour. b. ANSI/UL 1203 only addresses marking for a specific gas or vapour. 2. IEC TC31 has made it quite clear that complete identification of a specific dust or fiber/flying would involve such detail that it is not practical. It is not as simple as identifying the chemical formula of a gas or vapor. Aspects such as the chemical formula or CAS number of each constituent, along with amount of percentage of each, the bulk density, and the particle density could all be important. 3. The product standards for dusts or fibers/flyings are based on particle size (for exclusion) and maximum surface temperature (for layer/cloud ignition). For a small portion of Intrinsic Safety, protection is based on limitation of available energy to initiate an explosion. The maximum permitted energy of ~160?J is very conservative for dust. 4. All known equipment can be accommodated within the requirements of the existing equipment standards. There is no need to add additional confusion as to what is and is not suitable. 5. At one time, there may have been a need due to the temperature restrictions of Table 500.8(D)(2), but that requirement was removed ~20 years ago.

35 4 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A)(4) ] (4) Group D. Flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.75 mm or a minimum igniting current ratio (MIC ratio) (MIC) ratio greater than [497: ] Informational Note No. 1: A typical Class I, Group D material is propane. [ 497: ] Informational Note No. 2: For classification of areas involving ammonia atmospheres, see ANSI/ASHRAE , Safety Code for Mechanical Refrigeration Standard for Refrigeration Systems, and ANSI/CGA G , Safety Requirements for the Storage and Handling of Anhydrous Ammonia. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 10:52:58 EST 2015 Committee Statement Committee Statement: Response Message: Standards name and date update. ANSI/CGA G2.1 reference removed as it is not applicable to ammonia systems. Public Input No. 71-NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 3 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A.

36 Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Affirmative with Comment Ankele, Donald W. Due to this being extracted text, do not make the revision to MIC ratio in order to align with the indicated extraction. Lawrence, Jr., William G. the edits shown to "MIC Ratio" should not be implemented. The extracted text should be shown exactly as it is in NFPA 497. Wirfs, Mark C. NONE> Negative with Comment Wechsler, David B. Mr. Ankele and Mr. Lawrence are correct. Extracted material should be shown exactly as found in the source document and should not be revised as had been reflected in this case. However an affirmative with comment vote does not represent the correct action for this condition using extracted material within the NEC. The CC should challenge and correct this practice which does not seem to follow the NFPA manual of style. 5 of 270 4/16/ :12 AM

37 6 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(2) ] (2) Group F. Atmospheres containing combustible carbonaceous dusts that have more than 8 percent total entrapped volatiles (see ASTM D D , Standard Test Method for Volatile Matter in the Analysis Sample for Coal and Coke, for coal and coke dusts) or that have been sensitized by other materials so that they present an explosion hazard. [ 499: ] Coal, carbon black, charcoal, and coke dusts are examples of carbonaceous dusts. [499:A ] Informational Note: Testing of specific dust samples, following established ASTM testing procedures, is a method used to identify the combustibility of a specific dust and the need to classify those locations containing that material as Group F. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 10:18:52 EST 2015 Committee Statement Committee Statement: The reference was updated. Response Message: Public Input No NFPA [Section No (B)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G.

38 7 of 270 4/16/ :12 AM Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Affirmative with Comment Ankele, Donald W. Due to this being extracted text, undo the edit and drop the date on D 3175 in order to align with the indicated extraction. Wirfs, Mark C. NONE Negative with Comment Wechsler, David B. Extracted material should be shown exactly as found in the source document and should not be revised as had been reflected in this case. However an affirmative with comment vote does not represent the correct action for this condition using extracted material within the NEC. The CC should challenge and correct this practice which seems not to follow the NFPA manual of style.

39 8 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (K) [Excluding any Sub-Sections] ] A combustible gas detection system shall be permitted as a means of protection in industrial establishments with restricted public access and where the conditions of maintenance and supervision ensure that only qualified persons service the installation. Where such a system is installed, equipment specified in 500.7(K)(1), (K)(2), or (K)(3) shall be permitted. The type of detection equipment, its listing, installation location(s), alarm and shutdown criteria, and calibration frequency shall be documented when where combustible gas detectors are used as a protection technique. Informational Note No. 1: For further information, see ANSI/ISA ( )-2013, Explosive Atmospheres Part 29-1: Gas detectors Performance requirements of detectors for flammable gases, and ANSI/UL 2075, Gas and Vapor Detectors and Sensors. Informational Note No. 2: For further information, see ANSI/API RP 500 Revised , Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Division I or Division 2. Informational Note No. 3: For further information, see ANSI/ISA ( )-2012, Explosive Atmospheres Part 29-2: Gas detectors Selection, installation, use and maintenance of detectors for flammable gases and oxygen. Informational Note No. 4: For further information, see ISA-TR , Guide for Combustible Gas Detection as a Method of Protection. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 11:03:24 EST 2015 Committee Statement Committee Statement: Response Message: The references have been updated. Removed reference to ANSI/UL 2075, as ISA is the primary applicable US national standard for this application. Public Input No NFPA [Section No (K)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention

40 Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 9 of 270 4/16/ :12 AM

41 0 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Suitability. Suitability of identified equipment shall be determined by one of the following: (1) Equipment listing or labeling (2) Evidence of equipment evaluation from a qualified testing laboratory or inspection agency concerned with product evaluation (3) Evidence acceptable to the authority having jurisdiction such as a manufacturer's self-evaluation or an owner's engineering judgment. Informational Note: Additional documentation for equipment may include certificates demonstrating compliance with applicable equipment standards, indicating special conditions of use, and other pertinent information. Guidelines for certificates may be found in ANSI/ISA UL :2014, Certificate Standard for AEx Equipment for Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 11:22:24 EST 2015 Committee Statement Committee Statement: The reference was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J.

42 Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 1 of 270 4/16/ :12 AM

43 2 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C)(3) ] (3) Material Classification Group. The marking shall specify the applicable material classification group(s) or specific gas, vapor, dust, or fiber/flying in accordance with Exception: Fixed luminaires marked for use only in Class I, Division 2 or Class II, Division 2 locations shall not be required to indicate the group. Informational Note: A specific gas, vapor, dust, or fiber/flying is typically identified by the generic name, chemical formula, CAS number, or combination thereof. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:05:55 EST 2015 Committee Statement Committee Statement: The revised text allows the marking of a specific material in accordance with Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy

44 3 of 270 4/16/ :12 AM Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. The change to (3) should be to only add the text "or specific gas or vapor." HazLoc standards exist such as ANSI ISA and ANSI UL 1203 have such provision for marking of a specific gas or vapor in place of a gas group. There are no published requirements for the construction, testing and marking for a specific dust, fiber or flying. Similarly regarding the note, remove reference to dust and fiber/flying. Wirfs, Mark C. None. Negative with Comment Lawrence, Jr., William G. The text "dust or fiber/flying" should not be added. The Informational Note should read: "A specific gas or vapour is typically identified by the chemical formula" 1. The product standards do not include such a product marking for dusts or fiber/flying. a. ANSI/ISA only addresses marking for a specific gas or vapour. b. ANSI/UL 1203 only addresses marking for a specific gas or vapour. 2. IEC TC31 has made it quite clear that complete identification of a specific dust or fiber/flying would involve such detail that it is not practical. It is not as simple as identifying the chemical formula of a gas or vapor. Aspects such as the chemical formula or CAS number of each constituent, along with amount of percentage of each, the bulk density, and the particle density could all be important. 3. The product standards for dusts or fibers/flyings are based on particle size (for exclusion) and maximum surface temperature (for layer/cloud ignition). For a small portion of Intrinsic Safety, protection is based on limitation of available energy to initiate an explosion. The maximum permitted energy of ~160?J is very conservative for dust. 4. All known equipment can be accommodated within the requirements of the existing equipment standards. There is no need to add additional confusion as to what is and is not suitable. 5. At one time, there may have been a need due to the temperature restrictions of Table 500.8(D)(2), but that requirement was removed ~20 years ago.

45 4 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (D)(2) ] (2) Class II Temperature. The temperature marking specified in 500.8(C) shall be less than the ignition temperature of the specific dust to be encountered. For organic dusts that may dehydrate or carbonize, the temperature marking shall not exceed the lower of either the ignition temperature or 165 C (329 F). Informational Note: See NFPA , Recommended Practice for the Classification of Combustible Dusts and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas, for minimum ignition temperatures of specific dusts. The ignition temperature for which equipment was approved prior to this requirement shall be assumed to be as shown in Table 500.8(D)(2). Table 500.8(D)(2) Class II Temperatures Class II Group Equipment Not Subject to Overloading Equipment (Such as Motors or Power Transformers) That May Be Overloaded Normal Operation Abnormal Operation C F C F C F E F G Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:53:55 EST 2015 Committee Statement Committee Statement: Table 500.8(D)(2) and paragraph referencing the table is outdated by several code cycles as fixed limits do not apply anymore. The comparable table for gases and vapors has been removed now for several cycles. Response Message: Public Input No NFPA [Section No (D)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments

46 5 of 270 4/16/ :12 AM 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

47 6 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(2) ] (2) Equipment Provided with Threaded Entries for Metric-Threaded Conduit or Fittings. For equipment with metric-threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT-threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT-threaded fittings. Metric-threaded entries fittings installed into explosionproof equipment shall have a class of fit of at least 6g/6H and shall be made up with at least five threads fully engaged for Group C and Group D, and at least eight threads fully engaged for Group A and Group B and wrenchtight. Informational Note: Threading specifications for metric-threaded entries are located in ISO , ISO general purpose metric screw threads Tolerances Part 1: Principles and basic data, and ISO , ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:56:22 EST 2015 Committee Statement Committee Statement: Section 500.9(E)(2) is not consistent with the equipment standards used to assess flame-proof equipment. The current standards require at least 5 full metric threads, regardless of gas group. Testing and field experience has demonstrated that 5 thread engagement is sufficient for all groups. References were updated. Response Message: Public Input No NFPA [Section No (E)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 3 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All

48 Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Regarding paragraph 2, the paragraph needs to be further edited to remove the phrase "have a class of fit of at least 6g/6H and shall". This is because the fittings are required in the first paragraph to be listed. The class of fit is a requirement of listing. Therefore it is not needed to require gauging of the threads in the field. Lawrence, Jr., William G. The product standards for fittings and equipment already include the necessary class of fit. "shall have a class of fit of at least 6g/6H and" is not required and can be deleted. Wirfs, Mark C. None. 7 of 270 4/16/ :12 AM

49 8 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (F) ] (F) Optical Fiber Cables. Where an An optical fiber cable contains conductors that are capable of carrying current, with or without current-carrying conductors (composite optical fiber cable), the optical fiber cable shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with the requirements of Article 500, 501, 502, or 503, as applicable. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:18:42 EST 2015 Committee Statement Committee Statement: Response Message: The revised text clarifies that the cable needs to be sealed for explosion hazard and address the fire hazards, regardless if the cable contains current carrying conductors or not. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans

50 9 of 270 4/16/ :12 AM McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

51 0 of 270 4/16/ :12 AM First Revision No NFPA [ Sections (A)(1), (A)(2) ] (1) General. In Class I, Division 1 locations, the wiring methods in (a) through (e f ) shall be permitted. (a) Threaded rigid metal conduit or threaded steel intermediate metal conduit. Exception: Type PVC conduit, and Type RTRC conduit, and Type HDPE conduit shall be permitted where encased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measured from the top of the conduit to grade. The concrete encasement shall be permitted to be omitted where subject to the provisions of 514.8, Exception No. 2, and or 515.8(A). Threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of non current-carrying metal parts. (b) Type MI cable terminated with fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings. (c) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type MC-HL cable listed for use in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor(s) in accordance with , and terminated with fittings listed for the application. Type MC-HL cable shall be installed in accordance with the provisions of Article 330, Part II. (d) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type ITC-HL cable listed for use in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for the application, and installed in accordance with the provisions of Article 727. (e) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in raceways in accordance with (A). These optical fiber cables shall be sealed in accordance with (f) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less, and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with that is terminated with fittings listed for the location. Type TC-ER-HL cables shall be installed in accordance with the provisions of Article , including the restrictions of (7). (2) Flexible Connections. Where necessary to employ flexible connections, as at motor terminals, the following shall be permitted: (1) Flexible fittings listed for the location, or (2) Flexible cord in accordance with the provisions of , terminated with cord connectors listed for the location, or (2) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less, and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with that is terminated with fittings listed for the location Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ]

52 1 of 270 4/16/ :12 AM Street Address: City: State: Zip: Submittal Date: Tue Jan 13 14:10:25 EST 2015 Committee Statement Committee Statement: It was not the intent of the Panel that the exception in (1)(a) apply only in the case of a location serving simultaneously as a dispensing facility and a bulk fuel storage facility. Therefore, the word "and" was changed to "or". Mid span failures are extremely rare and eliminating a connection in a classified location between the fixed and flexible portions of the circuit provides a further reduction in the risk of failure by eliminating that connection. Response Message: Public Input No NFPA [Section No (A)] Public Input No NFPA [Section No (A)(1)] Public Input No NFPA [Sections (A)(1), (A)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 10 Affirmative All 1 Affirmative with Comments 4 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Blais, Steven J.

53 2 of 270 4/16/ :12 AM It is not clear as to what type of connectors and/or couplings are suitable to transition from HDPE to Threaded Rigid Metal Conduit or Threaded Steel Intermediate Metal Conduit prior to emerging from the ground. The committee statement indicates that mid span failures are extremely rare ; this is in large part due to the more robust wiring methods required for Class I, Div 1 locations. Allowing long runs of a cable wiring method with only a nonmetallic jacket is not equivalent to the protection afforded by metal conduit or cable armor. Nonmetallic wiring methods such as PVC conduit and RTRC are only allowed where encased in concrete, and NEMA would support the allowance of TC-ER-HL where encased in concrete. Burns, Dave The addition of Type HDPE conduit in this section in not part of this negative ballot. As currently written, there are no restrictions in the use of non-armored cable in Division 1 locations which could compromise the level of safety at the location. The use of this cable in Division 1 locations is suitable provided there are appropriate restrictions as identified in the proposed text below. The new text in (f) should be modified as follows: (f) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with and installed in accordance with the provisions of Article including the restrictions of (7) shall be permitted for the following applications: (1) For applications limited to 150 volts, nominal, or less and limited to 30A circuit maximum. (2) For applications above the limitations identified in (1), a metallic shield encompassing all the current carrying conductors of sufficient material and size that will provide a reliable ground fault path that will ensure the operation of a ground fault protection device shall be required. McBride, William E. The unrestricted use of unarmored cable in Class I, Division 1 locations is not justified as electrical protection may be compromised. The new text in (f) should be modified as follows: (f) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with and installed in accordance with the provisions of Article including the restrictions of (7) shall be permitted for the following applications: (1) For applications limited to 150 volts, nominal, or less and limited to 30A circuit maximum. (2) For applications above the limitations identified in (1), a metallic shield encompassing all the current carrying conductors of sufficient material and size that will provide a reliable ground fault path that will ensure the operation of a ground fault protection device shall be required. Simmons, John L. This revision permits "plug and play" installations which would indicate the purpose is to allow personnel with a lower level of knowledge to connect and disconnect the instrumentation. There is no guarantee that the cable will ever be supported as required in Article 336. The phrase "in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation" adds nothing to warrant an exception to the restrictions placed on these installations in the current NEC. Why are we creating code language that is subjective and ambiguous with terms that are not defined in the National Electrical Code? What is an industrial establishment? How does restricted public access make an installation more secure? Does the restricted access mean that fewer people will be hurt if something goes wrong? Are there some industrial locations that allow public access and others that do not? Who determines how much public access is allowed to comply with this relaxed requirement? Who will monitor the access? The parent text requirements found in this section are there because hazardous gases or vapors may be present in explosive mixtures, how does restricting public access improve safety or make it less dangerous than other, non-industrial, locations? Does the phrase where conditions of maintenance and supervision ensure that only qualified persons service the installation make sense? How can conditions of maintenance ensure what qualified persons do? While the NEC does provide a very loose definition of a qualified person, does the fact that a facility that is designated an industrial location ensure that installation and maintenance personnel are qualified to safely install electrical equipment in hazardous locations? It is a mistake to relax any Code requirement with the belief that by loosely defining a type of facility, restricting public access and stating that some condition of maintenance will ensure that qualified person will service the location. How will the fact that qualified persons are servicing the installation prevent a fire or explosion if there is a failure of the equipment or an accident? If a wiring application is safe for a Class I, Division 1 location in a location classified as an Industrial establishment, why isn t the application safe for a non-industrial location? The whole concept of an industrial location as currently used and as proposed herein is not defined and loosely restricted. This language is confusing and unenforceable

54 3 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(1) ] (1) General. In Class I, Division 2 locations, all wiring methods permitted in (A) and the following wiring methods shall be permitted: (1) All wiring methods permitted in (A). Rigid metal conduit (RMC) and intermediate metal conduit (IMC) with listed threadless fittings. (2) Electrical metallic tubing (EMT) with listed fittings. (3) Enclosed gasketed busways and enclosed gasketed wireways. (4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings. (5) Type ITC and Type ITC-ER cable as permitted in and terminated with listed fittings. (6) Type MC, MV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall be terminated with listed fittings. (7) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation and where metallic conduit does not provide sufficient corrosion resistance, listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit, factory elbows, and associated fittings shall be permitted. (8) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in cable trays or any other raceway in accordance with (B). Optical fiber cables shall be sealed in accordance with (9) Cablebus. Where seals are required for boundary conditions as defined in (A)(4), the Division 1 wiring method shall extend into the Division 2 area to the seal, which shall be located on the Division 2 side of the Division 1 Division 2 boundary. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 14:57:47 EST 2015 Committee Statement Committee Statement: Threadless fittings for RMC and IMC, along with the addition of EMT, provide an appropriate level of safety for a Class I, Division 2 location. Sealing with threaded connections at the Class I, Division 2 boundary is already addressed by (B)(2). Cablebus per Article 370 provides a level of safety equivalent to the other wiring methods permitted for the identified locations. Response Message: Public Input No NFPA [Section No (B)(1)]

55 4 of 270 4/16/ :12 AM Public Input No NFPA [Section No (B)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 9 Affirmative All 2 Affirmative with Comments 4 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Affirmative with Comment Wechsler, David B. There has been no data supplied to support EMT s use in Class I hazardous classified locations and merely suggesting that other methods may or may not offer equivalent protection is highly subjective. We strongly suggest that CMP14 review this application in the comment stage and consider what data, if any, supports adding this use in Class I, hazardous classified locations. Note: Correct spelling of Metallic Wirfs, Mark C. None. Negative with Comment Burns, Dave The wiring method "EMT" is not equivalent to any existing approved wiring methods for use in Class I, Division 2 locations. There were no adequate substantiations provided with this proposal. There is no evidence to justify the lowering of standards for wiring practices in Class I, Division 2 areas. There were no restrictions for fittings; this method would not provide the positive grounding provisions in order to provide a reasonable degree of safety in hazardous locations. An application of a seal fitting with this material may not comply with the requirements of Article The physical properties of this method is not sufficient to be installed in hazardous location. The wall thickness of EMT is typically less than half on the other wiring methods identified in this section. EMT conduit installed in Division 2 public areas such as garages, gas stations, hangers, etc. could be subject to physical damage and result in an open ignition source in a hazardous location. This use of this wiring method in Class I, Division 2 locations will lower the current standard of safety. Kines, Haywood The use of Electrical Metallic Tubing in any Class 1 Division II location such as repair garages where there are potential hazards or accidental damage to the raceways that creates a potential safety hazard where the raceway is used as the equipment grounding means. Arching from fault currents due to damaged tubing or fittings used on this type of raceway could be a safety hazard due to the types of liquids or gases present in the air. The approval for use in Industrial establishments with restrict public access and conditions of maintenance and supervision was ensued by qualified personnel only, would be a lower hazardous use of EMT and its listed fittings.

56 5 of 270 4/16/ :12 AM McBride, William E. The wiring method "EMT" is not equivalent to existing approved wiring methods for use in Class I, Division 2 locations. There were no adequate substantiations provided with this proposal. There is no evidence to justify the lowering of standards for wiring practices in Class I, Division 2 areas. There were no restrictions for fittings; this method would not provide the positive grounding provisions in order to provide a reasonable degree of safety in hazardous locations. An application of a seal fitting with this material would not comply with the requirements of Article The physical properties of this method is not sufficient to be installed in hazardous location The wall thickness of EMT is typically less than half on the other wiring methods identified in this section. This use of this wiring method in Class I, Division 2 locations will lower the standard of safety. Simmons, John L. A Class I, Division 2 location is just an accident or equipment malfunction from being a Class I, Division I location. This first revision will relax the wiring methods permitted in Class I, Division 2 locations without providing one piece of technical data to prove that the use of EMT and /or threadless fittings provides a safe installation in these locations. This could prove to be dangerous.

57 6 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A)(1) ] (1) Entering Enclosures. Each conduit entry into an explosionproof enclosure shall have a conduit seal where either of the following conditions applies: (1) The enclosure contains apparatus, such as switches, circuit breakers, fuses, relays, or resistors, that may produce arcs, sparks, or temperatures that exceed 80 percent of the autoignition temperature, in degrees Celsius, of the gas or vapor involved in normal operation. Exception: Seals shall not be required for conduit entering an enclosure under any one of the following conditions: a. The switch, circuit breaker, fuse, relay, or resistor is enclosed within a chamber hermetically sealed against the entrance of gases or vapors. b. The switch, circuit breaker, fuse, relay, or resistor is immersed in oil in accordance with (B)(1)(2). c. The switch, circuit breaker, fuse, relay, or resistor is enclosed within a factory-sealed explosionproof chamber located within the enclosure, identified for the location, and marked factory sealed or equivalent. d. The switch, circuit breaker, fuse, relay, or resistor is part of a nonincendive circuit. (2) The entry is metric designator 53 (trade size 2) or larger, and the enclosure contains terminals, splices, or taps. Factory-sealed enclosures shall not be considered to serve as a seal for another adjacent explosionproof enclosure that is required to have a conduit seal. Conduit seals shall be installed within 450 mm (18 in.) from the enclosure or as required by the enclosure marking. Only explosionproof unions, couplings, reducers, elbows, and capped elbows, and conduit bodies similar to L, T, and Cross types that are not larger than the trade size of the conduit shall be permitted between the sealing fitting and the explosionproof enclosure. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Thu Jan 15 08:38:50 EST 2015 Committee Statement Committee Statement: Response Message: This revision correlates with the revision to (D)(1). Some explosionproof enclosures must have the seal located less than 18 in. away and are so marked. It was not the intent of this section to override those restrictions. Conduit bodies were removed from the list in (2) because they should not be allowed in this application due to the increased volume in the raceway system. Ballot Results This item has passed ballot

58 7 of 270 4/16/ :12 AM 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

59 8 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (D)(1) ] (1) At Terminations. Cables shall be sealed with sealing fittings that comply with (C) at all terminations. Type MC-HL cables with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material shall be sealed with a listed fitting after the jacket and any other covering have been removed so that the sealing compound can surround each individual insulated conductor in such a manner as to minimize the passage of gases and vapors. Seals for cables entering enclosures shall be installed within 450 mm (18 in.) of the enclosure or as required by the enclosure marking. Only explosionproof unions, couplings, reducers, elbows, and capped elbows that are not larger than the trade size of the enclosure entry shall be permitted between the sealing fitting and the enclosure. Exception: Shielded cables and twisted pair cables shall not require the removal of the shielding material or separation of the twisted pairs, provided the termination is sealed by an approved means to minimize the entrance of gases or vapors and prevent propagation of flame into the cable core. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Thu Jan 15 08:32:23 EST 2015 Committee Statement Committee Statement: The revised text addresses the need for other types of explosionproof fittings that can be safely utilized between a cable seal and an enclosure. Some explosionproof enclosures must have the seal located less than 18 in. away and are so marked. Response Message: Public Input No NFPA [Section No (D)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All

60 Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 9 of 270 4/16/ :12 AM

61 0 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(3) ] (3) Cables Capable of Transmitting Gases or Vapors. Cables with a gas/vaportight continuous sheath capable of transmitting gases or vapors through the cable core shall not be required to be sealed except as required in (E)(1), unless the cable is attached to process equipment or devices that may cause a pressure in excess of 1500 pascals (6 in. of water) to be exerted at a cable end, in which case a seal, a barrier, or other means shall be provided to prevent migration of flammables into an unclassified location. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Thu Jan 15 08:14:30 EST 2015 Committee Statement Committee Statement: The revised text provides clarification that these cables are only required to be sealed when required by (E)(1) or when these cables are attached to process equipment or devices that may cause a pressure in excess of 1500 pascals (6 in. of water). This revision correlates with the requirements in (C)(2) for Class I, Zone 2 applications. Response Message: Public Input No NFPA [Section No (E)(3)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood

62 Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Ankele, Donald W. Retain the wording of the 2014 NEC. This is because the proposed revision could permit the passage of gasses or vapors into an unclassified area. The 2014 wording was revised such that the end of the cable be sealed in accordance with the sealing criteria in (E)(1) in order to seal the end of the cable because a cable with a gas tight sheath is no required to be sealed at the boundary. 1 of 270 4/16/ :12 AM

63 First Revision No NFPA [ Section No (A) ] (A) Class I, Division 1. In Class I, Division 1 locations, meters, instruments, and relays, including kilowatt-hour meters, instrument transformers, resistors, rectifiers, and thermionic tubes, shall comply with (A)(1) and (A)(2). (1) Enclosures. shall be provided with enclosures Enclosures that are identified for Class I, Division 1 locations shall be provided. Enclosures for Class I, Division 1 locations include explosionproof enclosures and purged and pressurized enclosures. Informational Note: See NFPA , Standard for Purged and Pressurized Enclosures for Electrical Equipment. (2) Connections. To facilitate replacement in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where the cable is not subject to physical damage, meters, instruments, and relays shall be permitted to be connected through Type TC-ER-HL cable by means of attachment plugs and receptacles, provided that all of the following conditions apply: (1) Attachment plug and receptacle is listed for use in Class I, Division 1 locations and for use with TC-ER-HL cable. (2) The attachment plug and receptacle is interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated. (3) Type TC-ER-HL cable is listed for use in Class I, Division 1 locations. (4) Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7). (5) Only necessary receptacles are provided. Supplemental Information File Name A_3969_BC.docx Description Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 16:22:49 EST 2015 Committee Statement Committee Statement: Type TC-ER-HL is added as a permissible wiring method for the connection of meters, instruments, and relays in a Class I, Division 1 location. Notation to the Article 336, including the restrictions of Section (7), is necessary to address Type TC-ER-HL. 2 of 270 4/16/ :12 AM

64 3 of 270 4/16/ :12 AM Response Message: Public Input No NFPA [Section No (A)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 1 Affirmative with Comments 2 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Burns, Dave Standard AC power plugs and receptacles should not be used for instrument connections. This may cause instrument malfunctions as the shielded circuits will not be continuous and promote possible confusion of power and instrumentation receptacles leading to instruments being exposed to excessive voltage resulting in a possible source of ignition in a hazardous location. Item (5) is recommended to be deleted as it provides nothing of value. Edit text as below: (2) Connections. To facilitate replacement in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where the cable is not subject to physical damage; meters, instruments and relays shall be permitted to be connected through Type TC-ER-HL cable, by means of attachment plugs and receptacles specifically identified for instrumentation, provided that all of the following conditions apply: (1) Attachment plug and receptacle is listed for use in Class I, Division 1 locations and for use with TC-ER-HL cable and individual circuits limited to 3 amperes. (2) The attachment plug and receptacle is interlocked mechanically, or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated. (3) Type TC-ER-HL cable is listed for use in Class I, Division 1 locations. (4) Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7). Simmons, John L. This revision permits "plug and play" installations which would indicate the purpose is to allow personnel with a

65 4 of 270 4/16/ :12 AM lower level of knowledge to connect and disconnect the instrumentation. There is no guarantee that the cable will ever be supported as required in Article 336. The phrase "in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation" adds nothing to warrant an exception to the restrictions placed on these installations in the current NEC. Why are we creating code language that is subjective and ambiguous with terms that are not defined in the National Electrical Code? What is an industrial establishment? How does restricted public access make an installation more secure? Does the restricted access mean that fewer people will be hurt if something goes wrong? Are there some industrial locations that allow public access and others that do not? Who determines how much public access is allowed to comply with this relaxed requirement? Who will monitor the access? The parent text requirements found in this section are there because hazardous gases or vapors may be present in explosive mixtures, how does restricting public access improve safety or make it less dangerous than other, non-industrial, locations? Does the phrase where conditions of maintenance and supervision ensure that only qualified persons service the installation make sense? How can conditions of maintenance ensure what qualified persons do? While the NEC does provide a very loose definition of a qualified person, does the fact that a facility that is designated an industrial location ensure that installation and maintenance personnel are qualified to safely install electrical equipment in hazardous locations? It is a mistake to relax any Code requirement with the belief that by loosely defining a type of facility, restricting public access and stating that some condition of maintenance will ensure that qualified person will service the location. How will the fact that qualified persons are servicing the installation prevent a fire or explosion if there is a failure of the equipment or an accident? If a wiring application is safe for a Class I, Division 1 location in a location classified as an Industrial establishment, why isn t the application safe for a non-industrial location? The whole concept of an industrial location as currently used and as proposed herein is not defined and loosely restricted. This language is confusing and unenforceable.

66 First Revision No NFPA [ Sections (B)(1), (B)(2), (B)(3), ] (1) General-Purpose Assemblies. Where an assembly is made up of components for which general-purpose enclosures are acceptable as provided in (B)(1), (B)(2), and (B)(3), a single general-purpose enclosure shall be acceptable for the assembly. Where such an assembly includes any of the equipment described in (B)(1), (B)(2), and (B)(3), the maximum obtainable surface temperature of any component of the assembly that exceeds 100 C shall be clearly and permanently indicated on the outside of the enclosure. Alternatively, equipment shall be permitted to be marked to indicate the temperature class for which it is suitable, using the temperature class (T Code) of Table 500.8(C). (2) Contacts. Switches, circuit breakers, and make-and-break contacts of pushbuttons, relays, alarm bells, and horns shall have enclosures identified for Class I, Division 1 locations in accordance with (A). Exception: General-purpose enclosures shall be permitted if current-interrupting contacts comply with one of the following: (1) Are immersed in oil (2) Are enclosed within a chamber that is hermetically sealed against the entrance of gases or vapors (3) Are in nonincendive circuits (4) Are listed for Division 2 (3) Resistors and Similar Equipment. Resistors, resistance devices, thermionic tubes, rectifiers, and similar equipment that are used in or in connection with meters, instruments, and relays shall comply with (A). Exception: General-purpose-type enclosures shall be permitted if such equipment is without make-and-break or sliding contacts [other than as provided in (B)(2) (B)(2) (B) (2) (B)(1) ] and if the marked maximum operating temperature of any exposed surface will not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved or has been tested and found incapable of igniting the gas or vapor. This exception shall not apply to thermionic tubes. (4) Without Make-or-Break Contacts. Transformer windings, impedance coils, solenoids, and other windings that do not incorporate sliding or make-or-break contacts shall be provided with enclosures. General-purpose-type enclosures shall be permitted. (5) Fuses. Where general-purpose enclosures are permitted in (B)(2) (B)(2) (B) (2) (B)(1) through (B)(4), fuses for overcurrent protection of instrument circuits not subject to overloading in normal use shall be permitted to be mounted in general-purpose enclosures if each such fuse is preceded by a switch complying with (B)(2) (B)(2) (B)(2) (B)(1). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Thu Jan 15 08:10:06 EST 2015 Committee Statement 5 of 270 4/16/ :12 AM

67 6 of 270 4/16/ :12 AM Committee Statement: The requirement for marking the maximum attainable surface temperature of any component should also apply to enclosures that contain switches, circuit breakers, and make-and-break contacts or where transformer windings, impedance coils, solenoids, and other windings are contained within the enclosure. The section was further revised to clarify when the 80% rule of the AIT applies and when the Temperature Classification can be used. Also added was the exclusion to the marking requirement for surface temperatures that are 100 C or less. Response Message: Public Input No. 731-NFPA [Section No (B)(4)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 3 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Although not indicated by legislative text or other means such as the committee statement, the content of (B) (1), (2), (3) and (4) have been re-ordered, making the references within them now incorrect. Keep the original order of content as is currently published. Lawrence, Jr., William G. The sections have been renumbered and the references to those sections are now incorrect. (1) was (4), (2) was (1), (3) as (2), (4) was (3). (5) and (6) remained numbered as in the 2014 NEC. Wirfs, Mark C. None.

68 7 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(6) ] (6) Connections. To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, listed Type TC-ER cable, or Type TC-ER-HL cable, by means of attachment plug, and receptacle, provided that all of the following conditions apply: (1) Attachment plug and receptacle are listed for use in Class I, Division 2 locations and for use with flexible cords, Type TC-ER cable or Type TC-ER-HL cable as applicable, and shall be of the locking and grounding type. Exception: A Class I, Division 2 listing is not required if the circuit is nonincendive field wiring. (2) A Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch complying with (B)(2) (B)(2) (B)(2) (B)(1) is provided so that the attachment plug or receptacle is not depended on to interrupt current. Exception: The switch is not required if the circuit is nonincendive field wiring. (2) The current does not exceed 3 amperes at 120 volts, nominal. (3) The power-supply flexible cord does not exceed 900 mm (3 ft), and is of a type listed for extra-hard usage or for hard usage if protected by location, and is supplied through an attachment plug and receptacle of the locking and grounding type if applicable. (4) Type TC-ER cable or Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7), if applicable. (5) Only necessary receptacles are provided. (6) The Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, the instrumentation receptacle carries a label warning against plugging or unplugging under load. Supplemental Information File Name B-6_3967_BC.docx Description Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 15:34:37 EST 2015 Committee Statement Committee Statement: Types TC-ER and TC-ER-HL are added as permissible wiring methods for the connection of process control instruments in a Class I, Division 2 location. In addition, the requirements for flexible cords are clarified. Notation to the Article 336, including the restrictions of Section (7), is necessary to address Type TC-ER-HL.

69 8 of 270 4/16/ :12 AM Response Message: Public Input No NFPA [Section No (B)(6)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 10 Affirmative All 2 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Ankele, Donald W. Add Type TC cable to (6)(1) as it is a permitted Div. 2 wiring method. Wirfs, Mark C. None. Negative with Comment Burns, Dave This section is for instruments and relays and the current restriction for 3 ampere circuits should be maintained. Delete "if applicable" in (4), delete text in (5) as it adds no value, and delete (6) as the label exception introduces unnecessary hazards in a Division 2 locations. The section is proposed to read as follows: (B) Class I, Division 2. (6) Connections. To facilitate replacements, process control instruments shall be permitted to be connected through flexible cord, listed Type TC-ER cable or Type TC-ER-HL cable, by means of attachment plug, and receptacle specifically identified for instrumentation, provided that all of the following conditions apply: (1) Attachment plug and receptacle is listed for use in Class I, Division 2 locations and for use with flexible cords, Type TC-ER cable or Type TC-ER-HL cable as applicable, and shall be of the locking and grounding type. Exception: A Class I, Division 2 listing is not required if the circuit is nonincendive field wiring. (2) Unless the attachment plug and receptacle are interlocked mechanically, or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch complying with (B) (2) is provided so that the attachment plug or receptacle is not depended on to interrupt current. Exception: The switch is not required if the circuit is nonincendive field wiring. (3) The current does not exceed 3 amperes at 120 volts, nominal. (4) The flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage or for hard usage if protected by location. (5) Type TC-ER cable or Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7), if applicable.

70 McBride, William E. This section is for instruments and relays and the current restriction for 3 Amp circuit should be maintained. Delete "if applicable" in (4), delete text in (5) as it adds no value, and delete (6) as the label exception introduces unnecessary hazards in a Division 2 location. Simmons, John L. Section (B)(6) is not positive code language, it is a disguised exception. Requiring a label that does not reduce or eliminate the hazard in a Class 1, Division 2 location might not prevent a worker from plugging or unplugging equipment under load. There is always the possibility that an explosive concentration can exist and someone may unplug an instrument under load. The purpose of the National Electrical Code is to protect persons and property from the hazard arising from the use of electricity, this language does not provide for that (B)(6) should be deleted. 9 of 270 4/16/ :12 AM

71 0 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Class I, Division 1. In Class I, Division 1 locations, motors, generators, and other rotating electrical machinery shall be one of the following: (1) Identified for Class I, Division 1 locations (2) Of the totally enclosed type supplied with positive-pressure ventilation from a source of clean air with discharge to a safe area, so arranged to prevent energizing of the machine until ventilation has been established and the enclosure has been purged with at least 10 volumes of air, and also arranged to automatically de-energize the equipment when the air supply fails (3) Of the totally enclosed inert gas filled type supplied with a suitable reliable source of inert gas for pressurizing the enclosure, with devices provided to ensure a positive pressure in the enclosure and arranged to automatically de-energize the equipment when the gas supply fails (4) Of For machines that are for use only in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, the machine is permitted to be of a type designed to be submerged in a liquid that is flammable only when vaporized and mixed with air, or in a gas or vapor at a pressure greater than atmospheric and that is flammable only when mixed with air; and the machine is so arranged to prevent energizing it until it has been purged with the liquid or gas to exclude air, and also arranged to automatically de-energize the equipment when the supply of liquid or gas or vapor fails or the pressure is reduced to atmospheric Totally enclosed motors of the types specified in (A)(2) or (A)(3) shall have no external surface with an operating temperature in degrees Celsius in excess of 80 percent of the autoignition temperature of the gas or vapor involved. Appropriate devices shall be provided to detect and automatically de-energize the motor or provide an adequate alarm if there is any increase in temperature of the motor beyond designed limits. Auxiliary equipment shall be of a type identified for the location in which it is installed. Supplemental Information File Name A_3966_BC.docx Description Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 14:55:33 EST 2015 Committee Statement Committee Statement: Response Message: Submersible machines and those protected by a flammable atmosphere maintained above the UFL require operation and maintenance by trained persons, and therefore should only be used in industrial establishments with restricted public access.

72 1 of 270 4/16/ :12 AM Public Input No NFPA [Section No (A)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Simmons, John L. I understand the proposed restriction for this application and agree that the associated danger warrant either doing away with the practice or adding Code language that ensures the safety of the installation. The proposed language is subjective and ambiguous with terms that are not defined in the National Electrical Code. What is an industrial establishment? Is an industrial establishment created when the public is restricted and there are some type of conditions mandating that only qualified persons service the equipment? Does the fact that we classify a facility as being an industrial establishment mean that maintenance and repair operations are better than a non-industrial establishment? What are the guidelines for an industrial establishment and who is charged within ensuring that the facility remains in compliance? What is intended when the language restricted public access is used? Does it mean that the public should be kept out of the facility or do members of the public have to be accompanied, if the visit the facility? How does this provide a safer environment? Does the phrase where conditions of maintenance and supervision ensure that only qualified persons service the installation make sense? How can conditions of maintenance ensure that qualified persons service the facility? If an installation is dangerous under any circumstance, then it is the responsibility of the NEC to prohibit the practice for all facilities to ensure the safety of everyone involved. Fire and explosions cannot be prevented merely by creating an industrial establishment category

73 First Revision No NFPA [ Section No (B) ] (B) Class I, Division 2. In Class I, Division 2 locations, motors, generators, and other rotating electrical machinery in which are employed shall comply with the following: (1) Be identified for Class I, Division 2 locations, or (2) shall be identified for Class I, Division 1 locations, unless such sliding contacts, Be identified for Class I, Division 1 locations where sliding contacts, centrifugal or other types of switching mechanism (including motor overcurrent, overloading, and overtemperature devices), or integral resistance devices, either while starting or while running, are employed, or (3) Be open or nonexplosionproof enclosed motors, such as squirrel-cage induction motors without brushes, switching mechanisms, and resistance devices are provided with enclosures identified for Class I, Division 2 locations in accordance with (B) or similar arc-producing devices that are not identified for use in a Class I, Division 2 location. (4) The exposed surface of space heaters used to prevent condensation of moisture during shutdown periods shall not exceed 80 percent of the autoignition temperature in degrees Celsius of the gas or vapor involved when operated at rated voltage, and the maximum space heater surface temperature [based on a 40 C or higher marked ambient] shall be permanently marked on a visible nameplate mounted on the motor. Otherwise, space heaters shall be identified for Class I, Division 2 locations. In Class I, Division 2 locations, the installation of open or nonexplosionproof enclosed motors, such as squirrel-cage induction motors without brushes, switching mechanisms, or similar arc-producing devices that are not identified for use in a Class I, Division 2 location, shall be permitted. (5) A sliding contact shaft bonding device used for the purpose of maintaining the rotor at ground potential, shall be permitted where the potential discharge energy is determined to be nonincendive for the application. The shaft bonding device shall be permitted to be installed on the inside or the outside of the motor. Informational Note No. 1: It is important to consider the temperature of internal and external surfaces that may be exposed to the flammable atmosphere. Informational Note No. 2: It is important to consider the risk of ignition due to currents arcing across discontinuities and overheating of parts in multisection enclosures of large motors and generators. Such motors and generators may need equipotential bonding jumpers across joints in the enclosure and from enclosure to ground. Where the presence of ignitible gases or vapors is suspected, clean-air purging may be needed immediately prior to and during start-up periods. Informational Note No. 3: For further information on the application of electric motors in Class I, Division 2 hazardous (classified) locations, see IEEE , IEEE Guide for the Application of Electric Motors in Class I, Division 2 and Class I, Zone 2 Hazardous (Classified) Locations. Informational Note No. 4: Reciprocating engine-driven generators, compressors, and other equipment installed in Class I, Division 2 locations may present a risk of ignition of flammable materials associated with fuel, starting, compression, and so forth, due to inadvertent release or equipment malfunction by the engine ignition system and controls. For further information on the requirements for ignition systems for reciprocating engines installed in Class I, Division 2 hazardous (classified) locations, see ANSI/ISA UL , General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations. Informational Note No. 5: For details of the evaluation process to determine incendivity, refer to Annex A and Figure A1 of UL SU1836, Outline of Investigation for Electric Motors and Generators for Use in Class I, Division 2, Class I, Zone 2, Class II, Division 2 and Zone 22 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 2 of 270 4/16/ :12 AM

74 3 of 270 4/16/ :12 AM Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 17:27:16 EST 2015 Committee Statement Committee Statement: The (B) format is revised to follow the format of (A) to create uniformity. The new item 5) permits a shaft bonding device to be used on inverter-fed motors for the purpose of maintaining the rotor at ground potential to reduce bearing failure due to arcing. Informational note no. 5 was added to provide guidance on application of shaft bonding devices. The electrical ignition systems document for internal combustion engines located in hazardous areas has been renumbered. Response Message: Public Input No NFPA [Section No (B)] Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Affirmative with Comment Wirfs, Mark C. None.

75 4 of 270 4/16/ :12 AM Negative with Comment Wechsler, David B. Nothing in the NEC prohibits a shaft bonding device to be used on inverter-fed motors. There is not documentation to suggest that all inverter-fed motors require this bond. No standard has been supplied to define how the potential discharge energy would be nonincendive. The term application for which the requirement of nonincendive is not identified.

76 5 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B) ] (B) Attachment Plugs. Attachment plugs shall be of the type providing for connection to the equipment grounding conductor of a permitted flexible cord or cable and shall be identified for the location. Exception: Receptacles and attachment plugs as provided in (B)(6). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Thu Jan 15 09:31:14 EST 2015 Committee Statement Committee Statement: Type TC-ER-HL cable is a permissible wiring method in Class I, Division 1 locations, therefore Section (B) should be expanded to include the term cable along with cord. The exception was deleted, as the reference was incorrect and the original intent was unclear. Section Wiring Methods still apply to all Article 501 sections. Response Message: Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G.

77 Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Blais, Steven J. Type TC-ER-HL is not a flexible cord or flexible cable. Flexible cords and flexible cables are covered in Article 400. Wirfs, Mark C. None. 6 of 270 4/16/ :12 AM

78 7 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A)(1) ] (1) General. In Class II, Division 1 locations, the wiring methods in (1) through (4 5 ) shall be permitted: (1) Threaded rigid metal conduit, or threaded steel intermediate metal conduit. (2) Type MI cable with termination fittings listed for the location. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings. (3) In industrial establishments with limited public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, Type MC-HL cable, listed for use in Class II, Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, a separate equipment grounding conductor(s) in accordance with , and provided with termination fittings listed for the location, shall be permitted. (4) Optical fiber cables cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in raceways in accordance with (A). Optical fiber cables shall be sealed in accordance with (5) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, listed Type ITC-HL cable with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for the application, and installed in accordance with the provisions of Article 727. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 15:16:09 EST 2015 Committee Statement Committee Statement: ITC-HL provides an appropriate level of safety for a Class II, Division 1 location. Response Message: Public Input No NFPA [Section No (A)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention

79 Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Simmons, John L. This revision permits "plug and play" installations which would indicate the purpose is to allow personnel with a lower level of knowledge to connect and disconnect the instrumentation. There is no guarantee that the cable will ever be supported as required in Article 336. The phrase "in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation" adds nothing to warrant an exception to the restrictions placed on these installations in the current NEC. Why are we creating code language that is subjective and ambiguous with terms that are not defined in the National Electrical Code? What is an industrial establishment? How does restricted public access make an installation more secure? Does the restricted access mean that fewer people will be hurt if something goes wrong? Are there some industrial locations that allow public access and others that do not? Who determines how much public access is allowed to comply with this relaxed requirement? Who will monitor the access? The parent text requirements found in this section are there because hazardous gases or vapors may be present in explosive mixtures, how does restricting public access improve safety or make it less dangerous than other, non-industrial, locations? Does the phrase where conditions of maintenance and supervision ensure that only qualified persons service the installation make sense? How can conditions of maintenance ensure what qualified persons do? While the NEC does provide a very loose definition of a qualified person, does the fact that a facility that is designated an industrial location ensure that installation and maintenance personnel are qualified to safely install electrical equipment in hazardous locations? It is a mistake to relax any Code requirement with the belief that by loosely defining a type of facility, restricting public access and stating that some condition of maintenance will ensure that qualified person will service the location. How will the fact that qualified persons are servicing the installation prevent a fire or explosion if there is a failure of the equipment or an accident? If a wiring application is safe for a Class I, Division 1 location in a location classified as an Industrial establishment, why isn t the application safe for a non-industrial location? The whole concept of an industrial location as currently used and as proposed herein is not defined and loosely restricted. This language is confusing and unenforceable. 8 of 270 4/16/ :12 AM

80 9 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(1) ] (1) General. In Class II, Division 2 locations, the following wiring methods shall be permitted: (1) All wiring methods permitted in (A). (2) Rigid metal conduit, intermediate metal conduit, electrical metallic tubing, dusttight wireways. (3) Type MC or MI cable with listed termination fittings. (4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings. (5) Type ITC and Type ITC-ER cable as permitted in and terminated with listed fittings. (6) Type MC, MI, MV, TC, or TC-ER cable installed in ladder, ventilated trough, or ventilated channel cable trays in a single layer, with a space not less than the larger cable diameter between the two adjacent cables, shall be the wiring method employed. Exception to (6): Type MC cable listed for use in Class II, Division 1 locations shall be permitted to be installed without the spacings required by (6). (7) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation and where metallic conduit does not provide sufficient corrosion resistance, reinforced thermosetting resin conduit (RTRC) factory elbows, and associated fittings, all marked with suffix -XW, and Schedule 80 PVC conduit, factory elbows and associated fittings shall be permitted. (8) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in cable trays or any other raceway in accordance with (B). Optical fiber cables shall be sealed in accordance with (9) Cablebus. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 15:23:22 EST 2015 Committee Statement Committee Statement: MV and TC-ER provide an appropriate level of safety for a Class II, Division 2 location. Cablebus per Article 370 provides a level of safety equivalent to the other wiring methods permitted for the identified locations. Response Message: Public Input No NFPA [Section No (B)(1)] Public Input No NFPA [Section No (B)(1)] Public Input No NFPA [Section No (B)(1)] Ballot Results

81 0 of 270 4/16/ :12 AM This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

82 First Revision No NFPA [ Section No (A)(1) ] (1) General. In Class III, Division 1 locations, the wiring method shall be in accordance with (1) through (4) (5) : (1) Rigid metal conduit, Type PVC conduit, Type RTRC conduit, intermediate metal conduit, electrical metallic tubing, dusttight wireways, or Type MC or MI cable with listed termination fittings. (2) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings. (3) Type ITC and Type ITC-ER cable as permitted in and terminated with listed fittings. (4) Type MC, MI, MV, TC, or TC-ER cable installed in ladder, ventilated trough, or ventilated channel cable trays in a single layer, with a space not less than the larger cable diameter between the two adjacent cables, shall be the wiring method employed. The cable shall be terminated with listed fittings. Exception to (4): Type MC cable listed for use in Class II, Division 1 locations shall be permitted to be installed without the spacings required by (A)(1)(4). (5) Cablebus. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 15:31:32 EST 2015 Committee Statement Committee Statement: MV provides an appropriate level of safety for a Class III, Division 1 location. Cablebus per Article 370 provides a level of safety equivalent to the other wiring methods permitted for the identified locations. Response Message: Public Input No NFPA [Section No (A)(1)] Public Input No NFPA [Section No (A)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 1 Affirmative with Comments 2 Negative with Comments 0 Abstention 1 of 270 4/16/ :12 AM

83 Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Burns, Dave The use of non-shielded and non-metallic jacked MV cable should not be allowed in Class III, Division 1 locations. The substantiation for this proposal provided by a cable manufacturer "MV cable is allowed for Class I, Division 2 locations and should be allowed in Class III, Division 1 and 2 locations, as well" is not sufficient to lower the current standard of safety. Type MV Cable should have a more robust jacket if it is to be allowed in a Division 1 locations. McBride, William E. The use of non-metallic jacked MV cable should not be allowed in Class III, Division 1 locations. The substantiation for this proposal provided by a cable manufacturer "MV cable is allowed for Class I, Division 2 locations and should be allowed in Class III, Division 1 and 2 locations, as well" in not sufficient to lower the current standard of safety. Type MV Cable should have a more robust jacket if it is to be allowed in a Division 1 location; possibly a MV-ER-HL that has increased crush and impact requirements. 2 of 270 4/16/ :12 AM

84 3 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] Scope. This article covers the installation of intrinsically safe (I.S.) apparatus, wiring, and systems for Class I, II, and III locations Articles 500 through 516. Informational Note: For further information, see ANSI/ISA-RP , Recommended Practice for Wiring Methods for Hazardous (Classified) Locations Instrumentation Part 1: Intrinsic Safety. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:54:33 EST 2015 Committee Statement Committee Statement: Response Message: The Scope statement has been amended to resolve the scope conflict for Article 506 and other potentially affected articles. Public Input No. 724-NFPA [Section No (B)] Public Input No. 725-NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A.

85 4 of 270 4/16/ :12 AM Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

86 5 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Associated Apparatus. ] Associated Apparatus [as applied to Hazardous (Classified) Locations]. Apparatus in which the circuits are not necessarily intrinsically safe themselves but that affects the energy in the intrinsically safe circuits and is relied on to maintain intrinsic safety. Such apparatus is one of the following: (1) Electrical apparatus that has an alternative type of protection for use in the appropriate hazardous (classified) location (2) Electrical apparatus not so protected that shall not be used within a hazardous (classified) location Informational Note No. 1: Associated apparatus has identified intrinsically safe connections for intrinsically safe apparatus and also may have connections for nonintrinsically safe apparatus. Informational Note No. 2: An example of associated apparatus is an intrinsic safety barrier, which is a network designed to limit the energy (voltage and current) available to the protected circuit in the hazardous (classified) location, under specified fault conditions. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:14:22 EST 2015 Committee Statement Committee Statement: The term Associated Apparatus appears in Articles 500,504, 505, and 506. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Associated Apparatus.] Public Input No NFPA [New Definition after Definition: Arc-Fault Circuit Interrup...] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey

87 Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 6 of 270 4/16/ :12 AM

88 First Revision No NFPA [ Definition: Intrinsically Safe Apparatus. ] Intrinsically Safe Apparatus. Apparatus in which all the circuits are intrinsically safe. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:18:52 EST 2015 Committee Statement Committee Statement: The term Intrinsically Safe Apparatus appears in Articles 500, 504, and 505. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Response Message: Public Input No NFPA [Definition: Intrinsically Safe Apparatus.] Public Input No NFPA [New Definition after Definition: Isolated (as applied to lo...] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 10 Affirmative All 2 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. 7 of 270 4/16/ :12 AM

89 Wechsler, David B. Affirmative with Comment Ankele, Donald W. Add the wording "[as applied to Hazardous (Classified) Locations]" Wirfs, Mark C. None. Negative with Comment Burns, Dave The definitions were relocated based on direction from the TCC. Panel 14 followed this direction but is unaware if other panels followed suit. Consistancy within the document is important to the user. If the definitions are to be moved to Art. 100, some cross-reference should be provided for this code cycle. Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. McBride, William E. For this code cycle only, a cross-reference in to be relocated definitions in Art 100 is recommended in this location for sustained usability. The code panel is moving the definition without leaving a trail where the definition is relocated to article 100 and will result in confusion for the use of this article should refer users of the code to see Article 100 for definitions formerly located in Section of 270 4/16/ :12 AM

90 Appa... ] First Revision No NFPA [ Definitions (504.2): Intrinsical... to Simple Intrinsically Safe System [as applied to Hazardous (Classified) Locations]. An assembly of interconnected intrinsically safe apparatus, associated apparatus, and interconnecting cables, in that those parts of the system that may be used in hazardous (classified) locations are intrinsically safe circuits. Informational Note: An intrinsically safe system may include more than one intrinsically safe circuit. Simple Apparatus [as applied to Hazardous (Classified) Locations]. An electrical component or combination of components of simple construction with well-defined electrical parameters that does not generate more than 1.5 volts, 100 ma, and 25 mw, or a passive component that does not dissipate more than 1.3 watts and is compatible with the intrinsic safety of the circuit in which it is used. Informational Note: The following apparatus are examples of simple apparatus: (1) Passive components; for example, switches, junction boxes, resistance temperature devices, and simple semiconductor devices such as LEDs (2) Sources of stored energy consisting of single components in simple circuits with well-defined parameters; for example, capacitors or inductors, whose values are considered when determining the overall safety of the system (3) Sources of generated energy; for example, thermocouples and photocells, that do not generate more than 1.5 volts, 100 ma, and 25 mw Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:23:56 EST 2015 Committee Statement Committee Statement: The term Intrinsically Safe System appears in Articles 500, 504, and 250. the term Simple Apparatus appears in Articles 500, 501, 502, 503, 504, 505, and 506. The definitions are currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Intrinsically Safe System.] Public Input No NFPA [New Definition after Definition: Special Permission.] Public Input No NFPA [Definition: Simple Apparatus.] Ballot Results This item has passed ballot 16 Eligible Voters 9 of 270 4/16/ :12 AM

91 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 0 of 270 4/16/ :12 AM

92 First Revision No NFPA [ Section No (A) ] (A) Control Drawing. Intrinsically safe apparatus, associated apparatus, and other equipment shall be installed in accordance with the control drawing(s). A simple apparatus, whether or not shown on the control drawing(s), shall be permitted to be installed provided the simple apparatus that does not interconnect intrinsically safe circuits. Informational Note No. 1: The control drawing identification is marked on the apparatus. Informational Note No. 2: Associated apparatus with a marked Um of less than 250 V may require additional overvoltage protection at the inputs to limit any possible fault voltages to less than the Um marked on the product. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:50:47 EST 2015 Committee Statement Committee Statement: The Exception was removed and positive language inserted. Response Message: Public Input No NFPA [Section No (A)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. 1 of 270 4/16/ :12 AM

93 2 of 270 4/16/ :12 AM Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

94 3 of 270 4/16/ :12 AM First Revision No NFPA [ Sections (B), (C), (D) ] (B) Location. Intrinsically safe apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Associated apparatus shall be permitted to be installed in any hazardous (classified) location for which it has been identified. Simple apparatus shall be permitted to be installed in any hazardous (classified) location in which the maximum surface temperature of the simple apparatus does not exceed the ignition temperature of the flammable gases or vapors, flammable liquids, combustible dusts, or ignitible fibers/flyings present accordance with (D). (C) Enclosures. General-purpose enclosures shall be permitted for intrinsically safe apparatus and associated apparatus unless otherwise specified in the manufacturer s documentation. (D) Simple Apparatus. For simple apparatus, the Simple apparatus shall be permitted to be installed in any hazardous (classified) location in which the maximum surface temperature of the simple apparatus does not exceed the ignition temperature of the flammable gases or vapors, flammable liquids, combustible dusts, or ignitible fibers/flyings present. The maximum surface temperature can be determined from the values of the output power from the associated apparatus or apparatus to which it is connected to obtain the temperature class. The temperature class can be determined by: (1) Reference to Table (D) (2) Calculation using the following equation: where: T = surface temperature Po = output power marked on the associated apparatus or intrinsically safe apparatus Rth = thermal resistance of the simple apparatus Tamb = ambient temperature (normally 40 C) and reference Table 500.8(C) [504.10(D)] In addition, components with a surface area smaller than 10 cm 2 (excluding lead wires) may be classified as T5 if their surface temperature does not exceed 150 C. Table (D) Assessment for T4 Classification According to Component Size and Temperature Total Surface Area Excluding Lead Wires Requirement for T4 Classification <20 mm 2 Surface temperature 275 C 20 mm 2 10 cm 2 Surface temperature 200 C 20 mm 2 Power not exceeding 1.3 W* *Based on 40 C ambient temperature. Reduce to 1.2 W with an ambient of 60 C or 1.0 W with 80 C ambient temperature. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address:

95 4 of 270 4/16/ :12 AM City: State: Zip: Submittal Date: Fri Jan 16 14:44:28 EST 2015 Committee Statement Committee Statement: Response Message: The reorganization of the sections improve the usability of the Code. No technical requirements have been changed. Public Input No NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

96 First Revision No NFPA [ Section No ] Bonding. (A) Hazardous Locations Intrinsically Safe Apparatus. In hazardous (classified) locations, intrinsically Intrinsically safe apparatus, if of metal, shall be bonded in the hazardous (classified) location in accordance with (A), (A), (A), , or , as applicable.. (B) Unclassified Metal Raceways. In unclassified locations, where Where metal raceways are used for intrinsically safe system wiring, in hazardous (classified) locations, associated apparatus shall be bonded bonding at all ends of the raceway, regardless of the location, shall be in accordance with (A), (A), (A), , or , as applicable. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:28:01 EST 2015 Committee Statement Committee Statement: Response Message: The new language provides for improved clarity and usability. Regardless of where installed, the intrinsically safe apparatus, the associated apparatus, and metal raceways shall be bonded in accordance with the hazardous location rules. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. 5 of 270 4/16/ :12 AM

97 Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 6 of 270 4/16/ :12 AM

98 First Revision No NFPA [ Definition: Combustible Gas Detection System. ] Combustible Gas Detection System. A protection technique utilizing stationary gas detectors in industrial establishments. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:14:15 EST 2015 Committee Statement Committee Statement: Response Message: The term Combustible Gas Detection System is used in Articles 500 and 505. The definition has been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Public Input No NFPA [Definition: Combustible Gas Detection System.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan 7 of 270 4/16/ :12 AM

99 8 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

100 First Revision No NFPA [ Definition: Electrical and Electronic Equipment. ] Electrical and Electronic Equipment. Materials, fittings, devices, appliances, and the like that are part of, or in connection with, an electrical installation. Informational Note: Portable or transportable equipment having self-contained power supplies, such as battery-operated equipment, could potentially become an ignition source in hazardous (classified) locations. See ANSI/ISA , Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:31:35 EST 2015 Committee Statement Committee Statement: Response Message: The term is generic and does not require a definition. The informational note has been relocated to 500.4(B) and 505.4(B). Public Input No NFPA [New Definition after Definition: Electronically Actuated Fu...] Public Input No NFPA [Definition: Electrical and Electronic Equipment.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. 9 of 270 4/16/ :12 AM

101 Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 00 of 270 4/16/ :12 AM

102 01 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Unclassified Locations. ] Unclassified Locations. Locations determined to be neither Class I, Division 1; Class I, Division 2; Class I, Zone 0; Class I, Zone 1; Class I, Zone 2; Class II, Division 1; Class II, Division 2; Class III, Division 1; Class III, Division 2; Zone 20; Zone 21; Zone 22; or any combination thereof. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:19:58 EST 2015 Committee Statement Committee Statement: The term Unclassified Locations is used in Articles 500, 501, 502, 503, 504, 505, 506, 511, 513, 514, 516, and 400. The definition of this term has been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Response Message: Public Input No NFPA [Definition: Unclassified Locations.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E.

103 02 of 270 4/16/ :12 AM Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

104 Pro... ] First Revision No NFPA [ Definitions (505.2): Encapsulati... to Type of Encapsulation m. m. Type of protection where electrical parts that could ignite an explosive atmosphere by either sparking or heating are enclosed in a compound in such a way that this explosive atmosphere cannot be ignited. Informational Note No. 1: See ANSI/ISA ( )-2009, Explosive atmospheres Part 18: Equipment protection by encapsulation m ; and ANSI/UL , Explosive atmospheres Part 18: Equipment protection by encapsulation m. Informational Note No. 2: Encapsulation is designated type of protection ma for use in Zone 0 locations. Encapsulation is designated type of protection m or mb for use in Zone 1 locations. Encapsulation is designated type of protection mc for use in Zone 2 locations. Flameproof d. d. Type of protection where the enclosure will withstand an internal explosion of a flammable mixture that has penetrated into the interior, without suffering damage and without causing ignition, through any joints or structural openings in the enclosure, of an external explosive gas atmosphere consisting of one or more of the gases or vapors for which it is designed. Informational Note: See ANSI/ISA ( )-2009, Explosive Atmospheres, Part 1: Equipment protection by flameproof enclosures d ; and ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 1: Flameproof Enclosures d. Increased Safety e. e. Type of protection applied to electrical equipment that does not produce arcs or sparks in normal service and under specified abnormal conditions, in which additional measures are applied so as to give increased security against the possibility of excessive temperatures and of the occurrence of arcs and sparks. Informational Note: See ANSI/ISA ( )-2008, Explosive Atmospheres, Part 7: Equipment protection by increased safety e ; and ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 7: Increased Safety e. Intrinsic Safety i. i. Type of protection where any spark or thermal effect is incapable of causing ignition of a mixture of flammable or combustible material in air under prescribed test conditions. Informational Note No. 1: See ANSI/UL , Intrinsically Safe Apparatus and Associated Apparatus for Use in Class I, II, and III, Hazardous Locations; ANSI/ISA ( )-2011, Explosive Atmospheres: Part 11: Equipment protection by intrinsic safety i ; and ANSI/UL , Explosive Atmospheres, Part 11: Equipment protection by intrinsic safety i. Informational Note No. 2: Intrinsic safety is designated type of protection ia for use in Zone 0 locations. Intrinsic safety is designated type of protection ib for use in Zone 1 locations. Intrinsic safety is designated type of protection ic for use in Zone 2 locations. Informational Note No. 3: Intrinsically safe associated apparatus, designated by [ia], [ib], or [ic], is connected to intrinsically safe apparatus ( ia, ib, or ic, respectively) but is located outside the hazardous (classified) location unless also protected by another type of protection (such as flameproof). Oil Immersion o. o. Type of protection where electrical equipment is immersed in a protective liquid in such a way that an explosive atmosphere that may be above the liquid or outside the enclosure cannot be ignited. Informational Note: See ANSI/ISA ( )-2009, Explosive Atmospheres, Part 6: Equipment protection by oil immersion o ; and ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 6: Oil-Immersion o. 03 of 270 4/16/ :12 AM

105 Powder Filling q. q. Type of protection where electrical parts capable of igniting an explosive atmosphere are fixed in position and completely surrounded by filling material (glass or quartz powder) to prevent the ignition of an external explosive atmosphere. Informational Note: See ANSI/ISA ( )-2009, Explosive Atmospheres, Part 5: Equipment protection by powder filling q ; and ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 5: Powder Filling q. Pressurization p. p. Type of protection for electrical equipment that uses the technique of guarding against the ingress of the external atmosphere, which may be explosive, into an enclosure by maintaining a protective gas therein at a pressure above that of the external atmosphere. Informational Note: See ANSI/ISA UL ( ) , Explosive Atmospheres, Part 2: Equipment protection by pressurized enclosures p ; and IEC , Electrical apparatus for explosive gas atmospheres Part 13: Construction and use of rooms or buildings protected by pressurization. Type of Protection n. n. Type of protection where electrical equipment, in normal operation, is not capable of igniting a surrounding explosive gas atmosphere and a fault capable of causing ignition is not likely to occur. Informational Note: See ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 15: Type of Protection n ; and ANSI/ISA ( )-2009, Explosive Atmospheres Part 15: Equipment protection by type of protection n. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 16:40:58 EST 2015 Committee Statement Committee Statement: Response Message: The period at the end of the term header should be outside of the quotes and not inside. References were updated. Public Input No NFPA [Definition: Encapsulation m. ] Public Input No NFPA [Definition: Oil Immersion o. ] Public Input No NFPA [Definition: Intrinsic Safety i. ] Public Input No NFPA [Definition: Powder Filling q. ] Public Input No NFPA [Definition: Type of Protection n. ] Public Input No NFPA [Definition: Pressurization p. ] Public Input No NFPA [Definition: Increased Safety e. ] Public Input No NFPA [Definition: Flameproof d. ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 04 of 270 4/16/ :12 AM

106 05 of 270 4/16/ :12 AM 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Update the ANSI/UL to Update the ANSI/UL to Wirfs, Mark C. None.

107 06 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] General.

108 07 of 270 4/16/ :12 AM (A) Documentation for Industrial Occupancies. All areas in industrial occupancies designated as hazardous (classified) locations shall be properly documented. This documentation shall be available to those authorized to design, install, inspect, maintain, or operate electrical equipment at the location. Informational Note No. 1: For examples of area classification drawings, see ANSI/API RP , Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2; ANSI/ISA-TR ( )-1998 (IEC Mod), Recommended Practice for Classification of Locations for Electrical Installations Classified as Class I, Zone 0, Zone 1, or Zone 2 ; IEC , Electrical Apparatus for Explosive Gas Atmospheres, Classification of Hazardous Areas 2014 Explosive Atmospheres Part 10-1: Classification of Areas Explosive gas atmospheres ; and Model Code of Safe Practice in the Petroleum Industry, Part 15: Area Classification Code for Petroleum Installations Handling Flammable Fluids, IP 15:2005, The Energy Institute of Petroleum, London. Informational Note No. 2: Where gas detection equipment is used as a means of protection in accordance with 505.8(I)(1), (I)(2), or (I)(3), the documentation typically includes the type of detection equipment, its listing, installation location(s), alarm and shutdown criteria, and calibration frequency.

109 (B) Reference Standards. Important information relating to topics covered in Chapter 5 may be found in other publications. Informational Note No. 1: It is important that the authority having jurisdiction be familiar with recorded industrial experience as well as with standards of the National Fire Protection Association (NFPA), the American Petroleum Institute (API), the International Society of Automation (ISA), and the International Electrotechnical Commission (IEC) that may be of use in the classification of various locations, the determination of adequate ventilation, and the protection against static electricity and lightning hazards. Informational Note No. 2: For further information on the classification of locations, see NFPA , Recommended Practice for the Classification of Flammable Liquids, Gases, or Vapors and of Hazardous (Classified) Locations for Electrical Installations in Chemical Process Areas; ANSI/API RP , Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2; ANSI/ISA- TR ( )-1998 (IEC Mod), Recommended Practice for Classification of Locations for Electrical Installations Classified as Class I, Zone 0, Zone 1, or Zone 2 ; IEC , Electrical Apparatus for Explosive Gas Atmospheres, Classification of Hazardous Areas 2014, Explosive Atmospheres Part 10-1: Classification of Areas Explosive gas atmospheres ; and Model Code of Safe Practice in the Petroleum Industry, Part 15: Area Classification Code for Petroleum Installations Handling Flammable Fluids, IP 15:2005, The Energy Institute of Petroleum, London. Informational Note No. 3: For further information on protection against static electricity and lightning hazards in hazardous (classified) locations, see NFPA , Recommended Practice on Static Electricity; NFPA , Standard for the Installation of Lightning Protection Systems; and API RP , Protection Against Ignitions Arising Out of Static Lightning and Stray Currents. Informational Note No. 4: For further information on ventilation, see NFPA , Flammable and Combustible Liquids Code, and ANSI/API RP , Recommended Practice for Classification of Locations for Electrical Installations at Petroleum Facilities Classified as Class I, Zone 0, Zone 1, or Zone 2. Informational Note No. 5: For further information on electrical systems for hazardous (classified) locations on offshore oil and gas producing platforms, see ANSI/API RP 14FZ , Recommended Practice for Design and Installation of Electrical Systems for Fixed and Floating Offshore Petroleum Facilities for Unclassified and Class I, Zone 0, Zone 1, and Zone 2 Locations. Informational Note No. 6: For further information on the installation of electrical equipment in hazardous (classified) locations in general, see IEC , Electrical apparatus for explosive gas atmospheres Part 14: Electrical installations in explosive gas atmospheres (other than mines), and IEC , Electrical apparatus for explosive gas atmospheres Part 16: Artificial ventilation for the protection of analyzer(s) houses. Informational Note No. 7: For further information on application of electrical equipment in hazardous (classified) locations in general, see ANSI/ISA ( ) , Explosive Atmospheres Part 0: Equipment General Requirements; ANSI/ISA , Definitions and Information Pertaining to Electrical Apparatus in Hazardous (Classified) Locations; and ANSI/UL :2013, Electrical Apparatus for Explosive Gas Atmospheres Part 0: General Requirements. Informational Note No. 8: Portable or transportable equipment having self-contained power supplies, such as battery-operated equipment, could potentially become an ignition source in hazardous (classified) locations. See ANSI/ISA , Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Class I Zone 2 and Class III, Division 1 and 2 Hazardous (Classified) Locations. Informational Note No. 9: For additional information concerning the installation of equipment utilizing optical emissions technology (such as laser equipment) that could potentially become an ignition source in hazardous (classified) locations, see ANSI/ISA ( )-2013, Explosive Atmospheres Part 28: Protection of equipment and transmission systems using optical radiation. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] 08 of 270 4/16/ :12 AM

110 09 of 270 4/16/ :12 AM Street Address: City: State: Zip: Submittal Date: Tue Jan 13 11:21:13 EST 2015 Committee Statement Committee Statement: This is an update of standard references. The US adoption of the IEC was published in August of This document replaces the ANSI/ISA-TR (79-10 Mod) and the IEC documents. Informational note no. 2 was added to (A) to clarify how gas detection is documented. The panel notes that ANSI/API RP 505 is currently under revision and the date needs to be revised for consistency within this document. Informational note no. 8 was added to (B) to retain the information on battery-operated portable and transportable equipment from the definition of "Electrical and Electronic Equipment," which has been deleted. informational note NO. 9 was added to clarify potential risk of ignition from electrical equipment utilizing optical emissions technology. Response Message: Public Input No NFPA [Section No ] Public Input No NFPA [Section No (A)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L.

111 10 of 270 4/16/ :12 AM Affirmative with Comment Ankele, Donald W. Add a sentence to the end of the first paragraph under (A) "Gas detection equipment is documented in accordance with 505.8(I)" and remove note 2. Wirfs, Mark C. None. Negative with Comment Wechsler, David B. Regarding Informational Note 9: While potential risks of ignition from electrical equipment utilizing optical emissions technology may exist, the design and use of suitable electrical equipment used in hazardous classified locations is already addressed in the NEC. Optical emissions are not within the scope of the NEC. Therefore there is no need to include this reference in the NEC.

112 11 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Classification of Locations. Locations shall be classified depending on the properties of the flammable gases, flammable liquid produced vapors, combustible liquid produced vapors, combustible dusts, or fibers/flyings that may be present and the likelihood that a flammable or combustible concentration or quantity is present. Each room, section, or area shall be considered individually in determining its classification. Where pyrophoric materials are the only materials used or handled, these locations are outside the scope of this article. Informational Note No. 1: See for restrictions on area classification. Informational Note No. 2: Through the exercise of ingenuity in the layout of electrical installations for hazardous (classified) locations, it is frequently possible to locate much of the equipment in reduced level of classification or in an unclassified location and, thus, to reduce the amount of special equipment required. Refrigerant machinery rooms containing ammonia refrigeration systems that are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system that alarms at 1000 ppm may be classified as unclassified locations. Rooms and refrigerated areas containing ammonia refrigeration systems that are equipped with adequate mechanical ventilation that operates continuously or is initiated by a detection system that alarms at 1000 ppm may be classified as unclassified locations. Informational Note: For further information regarding classification and ventilation of areas involving ammonia, see ANSI/ASHRAE , Safety Code for Mechanical Refrigeration Standard for Refrigeration Systems ; and ANSI/CGA G (14-39), Safety Requirements for the Storage and Handling of Anhydrous Ammonia. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 10:57:24 EST 2015 Committee Statement Committee Statement: Standards name and date were updated. ANSI/CGA G2.1 reference was removed, as it is not applicable to ammonia systems. The revision clarifies that areas containing ammonia refrigeration may be classified as unclassified locations based on the use of gas detection and adequate ventilation, in order to harmonize with the ASHRAE standard. Response Message: Public Input No. 72-NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All

113 12 of 270 4/16/ :12 AM 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. The Task Group developed the change of the (A) title to GENERAL based on applicability and context coverage for 500.5(A). They FAILED to do the SAME for (A) and 506.5(A). The same logic and style manual basis applies and this should have been ALSO changed. We need to modify the 505.5(A) title to GENERAL.

114 13 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Group IIC. Atmospheres containing acetylene, hydrogen, or flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value less than or equal to 0.50 mm or minimum igniting current ratio (MIC ratio) (MIC) ratio less than or equal to [497: ] Informational Note: Group IIC is equivalent to a combination of Class I, Group A, and Class I, Group B, as described in 500.6(A)(1) and (A)(2). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:14:54 EST 2015 Committee Statement Committee Statement: The extract was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 3 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy

115 14 of 270 4/16/ :12 AM Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Due to this being extracted text, do not make the revision to MIC ratio in order to align with the indicated extraction. Lawrence, Jr., William G. the edits shown to "MIC Ratio" should not be implemented. The extracted text should be shown exactly as it is in NFPA 497. Wirfs, Mark C. None

116 15 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C) ] (C) Group IIA. Atmospheres containing acetone, ammonia, ethyl alcohol, gasoline, methane, propane, or flammable gas, flammable liquid produced vapor, or combustible liquid produced vapor mixed with air that may burn or explode, having either a maximum experimental safe gap (MESG) value greater than 0.90 mm or minimum igniting current ratio (MIC ratio) (MIC) ratio greater than [497: ] Informational Note: Group IIA is equivalent to Class I, Group D as described in 500.6(A)(4). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:38:29 EST 2015 Committee Statement Committee Statement: The extract was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 3 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan

117 16 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Due to this being extracted text, do not make the revision to MIC ratio in order to align with the indicated extraction. Lawrence, Jr., William G. the edits shown to "MIC Ratio" should not be implemented. The extracted text should be shown exactly as it is in NFPA 497. Wirfs, Mark C. None.

118 17 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (F) ] (F) Available Short-Circuit Current for Type of Protection e. The Unless listed and marked for connection to circuits with higher available short-circuit current, the available short-circuit current for electrical equipment using type of protection e for the field wiring connections in Zone 1 locations shall be limited to 10,000 rms symmetrical amperes to reduce the likelihood of ignition of a flammable atmosphere by an arc during a short-circuit event. Informational Note: Limitation of the available short-circuit current to this level may require the application of current-limiting fuses or current-limiting circuit breakers. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:24:17 EST 2015 Committee Statement Committee Statement: Response Message: Where listed and marked, equipment evaluated for a higher available short circuit current could be applied in a hazardous (classified) location. Public Input No NFPA [Section No (F)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood

119 Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 18 of 270 4/16/ :12 AM

120 19 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B) ] (B) Purged and Pressurized Pressurization p. This protection technique shall be permitted for equipment in those Class I, Zone 1 or Zone 2 locations for which it is identified. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:40:38 EST 2015 Committee Statement Committee Statement: This revision corrects the use of the term and aligns with the others in Response Message: Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan

121 20 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

122 21 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C) ] (C) Intrinsic Safety i. This protection technique shall be permitted for apparatus and associated apparatus in Class I, Zone 0, Zone 1, or Zone 2 locations for which it is listed. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:43:12 EST 2015 Committee Statement Committee Statement: The type of protection letter has been added to align with the rest of Response Message: Public Input No NFPA [Section No (C)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan

123 22 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

124 23 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C)(2) ]

125 24 of 270 4/16/ :12 AM (2) Zone Equipment.

126 25 of 270 4/16/ :12 AM Equipment meeting one or more of the protection techniques described in shall be marked with all of the following in the order shown: (1) Class (2) Zone (3) Symbol AEx (4) Protection technique(s) in accordance with Table 505.9(C)(2)(4) (5) Applicable material group in accordance with Table 505.9(C)(1)(2) or a specific gas or vapor (6) Temperature classification in accordance with 505.9(D)(1) Exception No. 1: Associated apparatus NOT suitable for installation in a hazardous (classified) location shall be required to be marked only with (3), (4), and (5), but BOTH the symbol AEx (3) and the symbol for the type of protection (4) shall be enclosed within the same square brackets, for example, [AEx ia] IIC. Exception No. 2: Simple apparatus as defined in shall not be required to have a marked operating temperature or temperature class. Exception No. 3: Fittings for the termination of cables shall not be required to have a marked operating temperature or temperature class. Informational Note No. 1: An example of the required marking for intrinsically safe apparatus for installation in Class I, Zone 0 is Class I, Zone 0, AEx ia IIC T6. An explanation of the marking that is required is shown in Informational Note Informational Note Figure 505.9(C)(2), No.1,,. Informational Note No. 2: An example of the required marking for intrinsically safe associated apparatus mounted in a flameproof enclosure for installation in Class I, Zone 1 is Class I, Zone 1 AEx d[ia] IIC T4. Informational Note No. 3: An example of the required marking for intrinsically safe associated apparatus NOT for installation in a hazardous (classified) location is [AEx ia] IIC. Informational Note No. 4: The EPL (or equipment protection level) may appear in the product marking. EPLs are designated as G for gas, D for dust, or M for mining and are then followed by a letter (a, b, or c) to give the user a better understanding as to whether the equipment provides either (a) a very high, (b) a high, or (c) an enhanced level of protection against ignition of an explosive atmosphere. For example, an a Class I, Zone 1, AEx d IIC T4 motor (which is suitable by protection concept for application in Zone 1) may additionally be marked with an EPL of Gb to indicate that it was provided with a high level of protection, such as Class I, Zone 1 AEx d IIC T4 Gb. Informational Note No. 5: Equipment installed outside a Zone 0 location, electrically connected to equipment located inside a Zone 0 location, may be marked Class I, Zone 0/1. The / indicates that equipment contains a separation element and can be installed at the boundary between a Zone 0 and a Zone 1 location. See ANSI/ISA , Electrical Apparatus for Use in Class I, Zone 0 Hazardous (Classified) Locations. Informational Note Figure 505.9(C)(2), No.1, Zone Equipment Marking. Table 505.9(C)(2)(4) Types of Protection Designation Designation Technique Zone* d Flameproof enclosure 1 db Flameproof enclosure 1 e Increased safety 1 eb Increased safety 1 ia Intrinsic safety 0

127 26 of 270 4/16/ :12 AM Designation Technique ib Intrinsic safety 1 ic Intrinsic safety 2 Zone* [ia] Associated apparatus Unclassified** [ib] Associated apparatus Unclassified** [ic] Associated apparatus Unclassified** ma Encapsulation 0 m Encapsulation 1 mb Encapsulation 1 mc Encapsulation 2 na Nonsparking equipment 2 nac Nonsparking equipment 2 nc ncc Sparking equipment in which the contacts are suitably protected other than by restricted breathing enclosure Sparking equipment in which the contacts are suitably protected other than by restricted breathing enclosure nr Restricted breathing enclosure 2 nrc Restricted breathing enclosure 2 o Oil immersion 1 ob Oil immersion 1 px Pressurization 1 pxb Pressurization 1 py Pressurization 1 pyb Pressurization 1 pz Pressurization 2 pzc Pressurization 2 q Powder filled 1 qb Powder filled 1 *Does not address use where a combination of techniques is used. **Associated apparatus is permitted to be installed in a hazardous (classified) location if suitably protected using another type of protection. 2 2 Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 12:48:40 EST 2015 Committee Statement Committee Statement: Class I, Zone 1 is missing from the example marking string. Response Message: Public Input No NFPA [Section No (C)(2)]

128 27 of 270 4/16/ :12 AM Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

129 28 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(1) ] (1) Equipment Provided with Threaded Entries for NPT Threaded Conduit or Fittings. For equipment provided with threaded entries for NPT threaded conduit or fittings, listed conduit, listed conduit fittings, or listed cable fittings shall be used. All NPT threaded conduit and fittings referred to herein shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. NPT threaded entries into explosionproof or flameproof equipment shall be made up with at least five threads fully engaged. Exception: For listed explosionproof or flameproof equipment, factory threaded factory-threaded NPT entries shall be made up with at least threads fully engaged. Informational Note No. 1: Thread specifications for male NPT threads are located in ANSI/ASME B , Pipe Threads, General Purpose (Inch). Informational Note No. 2: Female NPT threaded entries use a modified National Standard Pipe Taper (NPT) thread with thread form per ANSI/ASME B , Pipe Threads, General Purpose (Inch). See ANSI UL/ISA /UL :2013, Explosive Atmospheres Part 1: Equipment Protection by Flameproof Enclosures d ; and ANSI/ISA :2013, Electrical Apparatus for Explosive Gas Atmospheres Part 1: Equipment Protection by Flameproof Enclosures d. d. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 11:29:23 EST 2015 Committee Statement Committee Statement: Section of the 2011 NEC Style Manual states that words and terms shall avoid colloquial language. Specifically, the word herein is cited as a word that can be removed without affecting clarity. With the removal of this text, clarity is unaffected. References were updated. Response Message: Public Input No NFPA [Section No (E)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments

130 29 of 270 4/16/ :12 AM 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. update the reference to ANSI/UL to 2015 Wirfs, Mark C. None.

131 30 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(2) ] (2) Equipment Provided with Threaded Entries for Metric Threaded Conduit or Fittings. For equipment with metric threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT threaded fittings. Metric threaded entries fittings installed into explosionproof or flameproof equipment entries shall have a class of fit of at least 6g/6H and be made up with at least five threads fully engaged for Groups C, D, IIB, or IIA and not less than eight threads fully engaged for Groups A, B, IIC, or IIB + H 2 and wrenchtight. Informational Note: Threading specifications for metric threaded entries are located in ISO 965/ , ISO general pupose purpose metric screw threads Tolerances Part 1: Principles and basic data; and ISO , ISO general purpose metric screw threads Tolerances Part 3: Deviations for constructional screw threads; and ISO 965/3-1980, Metric Screw Threads. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 13:29:24 EST 2015 Committee Statement Committee Statement: Section 505.9(E)(2) is not consistent with the equipment standards used to assess flame-proof equipment. The current standard for flameproof equipment (ANSI/ISA ) requires at least 5 full metric threads, regardless of gas group. Testing and field experience has demonstrated that 5 thread engagement is sufficient for all groups. References were updated. Response Message: Public Input No NFPA [Section No (E)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 3 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey

132 Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Regarding paragraph 2, the paragraph needs to be further edited to remove the phrase "have a class of fit of at least 6g/6H and". This is because the fittings are required in the first paragraph to be listed. The class of fit is a requirement of listing. Therefore it is not needed to require gauging of the threads in the field. Lawrence, Jr., William G. The product standards for fittings and equipment already include the necessary class of fit. "shall have a class of fit of at least 6g/6H and" is not required and can be deleted. Wirfs, Mark C. None. 31 of 270 4/16/ :12 AM

133 32 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (F) ] (F) Optical Fiber Cables. Where an An optical fiber cable, contains conductors that are capable of with or without current- carrying current (composite optical fiber cable), the optical fiber cable shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with the requirements of Articles and Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:22:15 EST 2015 Committee Statement Committee Statement: Response Message: The revised text clarifies that the cable needs to be sealed for explosion hazard and address the fire hazards, regardless if the cable contains current carrying conductors or not. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans

134 33 of 270 4/16/ :12 AM McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

135 34 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) Class I, Zone 0. In Class I, Zone 0 locations, only intrinsically safe equipment protected by intrinsic safety ia and equipment protected by encapsulation ma shall be connected using intrinsically safe ia circuits with wiring methods in accordance with Article 504 shall be permitted. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:14:06 EST 2015 Committee Statement Committee Statement: Response Message: The current text permits any wiring method as referenced to Article wiring methods, which thus permits any unclassified wiring method, which would permit the connection of ma equipment to any wiring method, as well as any equipment suitable for Zone 1 and Zone 2 to use any wiring method, as referenced by (B)(1)(a) and (C)(1)(a). The new text correctly limits wiring methods for Zone 0 to intrinsically safe circuits only. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 1 Affirmative with Comments 2 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans

136 35 of 270 4/16/ :12 AM Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Burns, Dave The additional text appears to add confusion and seems to add requirements that are beyond the use of ia circuits for Class I, Zone 0 applications. McBride, William E. The additional text adds confusion and seems to add requirements that are beyond the use of ia circuits for Class I, Zone 0 applications.

137 First Revision No NFPA [ Section No (B)(1) ] (1) General. In Class I, Zone 1 locations, the wiring methods in (B)(1) (a) through (B)(1)(i) shall be permitted. (a) (b) All wiring methods permitted by (A). In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where the cable is not subject to physical damage, Type MC-HL cable listed for use in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath, an overall jacket of suitable polymeric material, and a separate equipment grounding conductor(s) in accordance with , and terminated with fittings listed for the application. Type MC-HL cable shall be installed in accordance with the provisions of Article 330, Part II. (c) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where the cable is not subject to physical damage, Type ITC-HL cable listed for use in Class I, Zone 1 or Division 1 locations, with a gas/vaportight continuous corrugated metallic sheath and an overall jacket of suitable polymeric material, and terminated with fittings listed for the application. Type ITC-HL cable shall be installed in accordance with the provisions of Article 727. Informational Note: See and for restrictions on use of Type ITC cable. (d) (e) (f) (g) (h) (i) Type MI cable terminated with fittings listed for Class I, Zone 1 or Division 1 locations. Type MI cable shall be installed and supported in a manner to avoid tensile stress at the termination fittings. Threaded rigid metal conduit, or threaded steel intermediate metal conduit. Type PVC conduit and Type RTRC conduit shall be permitted where encased in a concrete envelope a minimum of 50 mm (2 in.) thick and provided with not less than 600 mm (24 in.) of cover measured from the top of the conduit to grade. Threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for the last 600 mm (24 in.) of the underground run to emergence or to the point of connection to the aboveground raceway. An equipment grounding conductor shall be included to provide for electrical continuity of the raceway system and for grounding of non currentcarrying metal parts. Intrinsic safety type of protection ib shall be permitted using the wiring methods specified in Article 504. Informational Note: For entry into enclosures required to be flameproof, explosionproof, or of increased safety, see the information on construction, testing, and marking of cables; flameproof and increased safety cable fittings; and flameproof and increased safety cord connectors in ANSI/UL , Cables and Cable-Fittings for Use in Hazardous (Classified) Locations. Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in raceways in accordance with (B). Optical fiber cable shall be sealed in accordance with Informational Note: For entry into enclosures required to be flameproof, explosionproof, or of increased safety, see the information on construction, testing, and marking of cables; flameproof and increased safety cable fittings; and flameproof and increased safety cord connectors in ANSI/UL , Cables and Cable-Fittings for Use in Hazardous (Classified) Locations. In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts nominal or less, for cable diameters 25 mm (1 in.) or less, and where the cable is not subject to physical damage, Type TC-ER-HL cable listed for use in Class I, Zone 1 locations, with an overall jacket and a separate equipment grounding conductor(s) in accordance with , and terminated with fittings listed for the location, Type TC-ER-HL cable shall be installed in accordance with the provisions of Article 336, including the restrictions of (7). 36 of 270 4/16/ :12 AM

138 37 of 270 4/16/ :12 AM Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 15:41:55 EST 2015 Committee Statement Committee Statement: The diameter of the cable should not be restricted to 25 mm in item (i). Response Message: Public Input No. 614-NFPA [Section No (B)(1)] Public Input No NFPA [Section No (B)(1)] Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 1 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Blais, Steven J. Type TC-ER-HL is limited to 1 by the product standard, and should continue to be limited in size and use to

139 38 of 270 4/16/ :12 AM maintain the safety of wiring methods in Class I, Zone 1 locations. Burns, Dave As currently written, there are no restrictions in the use of non-armored cable in Zone 1 locations which could compromise the level of safety at the location. The use of this cable in Zone 1 locations is suitable provided there are appropriate restrictions as identified in the proposed text below. The new text in (i) should be modified as follows: (i) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with and installed in accordance with the provisions of Article including the restrictions of (7) shall be permitted for the following applications: (1) For applications limited to 150 volts, nominal, or less and limited to 30A circuit maximum. (2) For applications above the limitations identified in (1), a metallic shield encompassing all the current carrying conductors of sufficient material and size that will provide a reliable ground fault path that will ensure the operation of a ground fault protection device shall be required. McBride, William E. The unrestricted use of unarmored cable in Class I, Zone 1 locations is not justified as electrical protection may be compromised. The new text in (i) should be modified as follows: (i) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, for applications limited to 600 volts, nominal, or less and where protected from damage by location or a suitable guard, listed Type TC-ER-HL cable with an overall jacket and a separate equipment grounding conductor(s) in accordance with and installed in accordance with the provisions of Article including the restrictions of (7) shall be permitted for the following applications: (1) For applications limited to 150 volts, nominal, or less and limited to 30A circuit maximum. (2) For applications above the limitations identified in (1), a metallic shield encompassing all the current carrying conductors of sufficient material and size that will provide a reliable ground fault path that will ensure the operation of a ground fault protection device shall be required.

140 39 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C)(1) ] (1) General. In Class I, Zone 2 locations, the following wiring methods shall be permitted. : (1) All wiring methods permitted by (B). (2) Types MC, MV, TC, or TC-ER cable, including installation in cable tray systems. The cable shall be terminated with listed fittings. Single conductor Type MV cables shall be shielded or metallicarmored. (3) Type ITC and Type ITC-ER cable as permitted in and terminated with listed fittings. (4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings. (5) Enclosed gasketed busways, enclosed gasketed wireways. (6) In industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where metallic conduit does not provide sufficient corrosion resistance, listed reinforced thermosetting resin conduit (RTRC), factory elbows, and associated fittings, all marked with the suffix -XW, and Schedule 80 PVC conduit, factory elbows, and associated fittings shall be permitted. Where seals are required for boundary conditions as defined in (C)(1)(b), the Zone 1 wiring method shall extend into the Zone 2 area to the seal, which shall be located on the Zone 2 side of the Zone 1/Zone 2 boundary. (7) Intrinsic safety type of protection ic shall be permitted using any of the wiring methods permitted for unclassified locations. Intrinsic safety type of protection ic systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in an intrinsic safety type of protection ic circuit, provided that the simple apparatus does not interconnect the intrinsic safety type of protection ic systems to any other circuit. Informational Note: Simple apparatus is defined in (8) Optical fiber cable of Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in cable trays or any other raceway in accordance with (C). Optical fiber cable shall be sealed in accordance with (9) Cablebus. Separate intrinsic safety type of protection ic systems shall be installed in accordance with one of the following: (1) In separate cables (2) In multiconductor cables where the conductors of each circuit are within a grounded metal shield (3) In multiconductor cables where the conductors of each circuit have insulation with a minimum thickness of 0.25 mm (0.01 in.) Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:08:23 EST 2015 Committee Statement

141 40 of 270 4/16/ :12 AM Committee Statement: Response Message: Cablebus per Article 370 provides a level of safety equivalent to the other wiring methods permitted for the identified locations. Public Input No NFPA [Section No (C)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None.

142 41 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] Flexible Cables, Cords and Connections.

143 42 of 270 4/16/ :12 AM (A) Flexible Cords, Class I, Zones 1 and 2. A flexible cord shall be permitted for connection between portable lighting equipment or other portable utilization equipment and the fixed portion of their supply circuit. Flexible cord shall also be permitted for that portion of the circuit where the fixed wiring methods of (B) and (C) cannot provide the necessary degree of movement for fixed and mobile electrical utilization equipment in an industrial establishment where conditions of maintenance and engineering supervision ensure that only qualified persons install and service the installation, and where the flexible cord is protected by location or by a suitable guard from damage. The length of the flexible cord shall be continuous. Where flexible cords are used, the cords shall comply with the following: (1) Be of a type listed for extra-hard usage. (2) Contain, in addition to the conductors of the circuit, an equipment grounding conductor complying with (3) Be connected to terminals or to supply conductors in an approved manner. (4) Be supported by clamps or by other suitable means in such a manner that there will be no tension on the terminal connections. (5) Be terminated with a listed cord connector that maintains the type of protection where the flexible cord enters boxes, fittings, or enclosures that are required to be explosionproof or flameproof. (6) Cord entering an increased safety e enclosure shall be terminated with a listed increased safety e cord connector. Informational Note: See for permitted uses of flexible cords. Electric submersible pumps with means for removal without entering the wet-pit shall be considered portable utilization equipment. The extension of the flexible cord within a suitable raceway between the wet-pit and the power source shall be permitted. Electric mixers intended for travel into and out of open-type mixing tanks or vats shall be considered portable utilization equipment. Informational Note: See for flexible cords exposed to liquids having a deleterious effect on the conductor insulation.

144 (B) Power, Control, and Instrumentation Connections for Zone 1. To facilitate replacement in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation, and where the cable is not subject to physical damage; power, control, and instrumentation shall be permitted to be connected through Type TC-ER-HL cable, by means of attachment plugs and receptacles, provided that all of the following conditions apply: (1) Attachment plug and receptacle are listed for use in Class I, Zone 1 locations and for use with TC-ER-HL cable. Exception: A Class I, Zone 1 listing is not required if the circuit type of protection is ia or ib. (2) Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch listed for the location is provided so that the attachment plug or receptacle is not depended on to interrupt current. Exception: A switch is not required if the circuit type of protection is ia or ib. (3) Type TC-ER-HL cable is listed for use in Class I, Zone 1 locations. (4) Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7). (5) Only necessary receptacles are provided. (6) Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, the instrumentation receptacle carries a label warning against plugging or unplugging under load. (C) Power, Control, and Instrumentation Connections for Zone 2. To facilitate replacements, process power, control instruments and instrumentation shall be permitted to be connected through flexible cords, listed Type TC-ER cable or Type TC-ER-HL cable, by means of attachment plugs, and receptacles, provided that all of the following conditions apply: (1) Attachment plug and receptacle are listed for use in Class I, Zone 2 locations and for use with flexible cords, Type TC-ER cable or Type TC-ER-HL cable, as applicable, and shall be of the locking and grounding type. Exception: A Class I, Zone 2 listing is not required if the circuit type of protection is ia, ib, or ic. (2) Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, a switch listed for the location is provided so that the attachment plug or receptacle is not depended on to interrupt current. Exception: A switch is not required if the circuit type of protection is ia, ib, or ic. (2) The current does not exceed 3 amperes at 120 volts, nominal. (3) The power-supply flexible cord does not exceed 900 mm (3 ft), is of a type listed for extra-hard usage or for hard usage if protected by location, and is supplied through an attachment plug and receptacle of the locking and grounding type. if applicable. (4) Type TC-ER cable or Type TC-ER-HL cable is installed in accordance with the provisions of Article 336, including the restrictions of (7), if applicable (5) Only necessary receptacles are provided. (6) The Unless the attachment plug and receptacle are interlocked mechanically or electrically, or otherwise designed so that they cannot be separated when the contacts are energized and the contacts cannot be energized when the plug and socket outlet are separated, the instrumentation receptacle carries a label warning against unplugging under load. 43 of 270 4/16/ :12 AM

145 44 of 270 4/16/ :12 AM Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 16:06:30 EST 2015 Committee Statement Committee Statement: Types TC-ER and TC-ER-HL are added as permissible wiring methods for the connection of power, control, and instrumentation in a Class I, Zone 1 or Zone 2 location. In addition, the requirements for flexible cords are clarified. Notation to the Article 336, including the restrictions of Section (7), is necessary to address Type TC-ER-HL. Response Message: Public Input No NFPA [Section No (B)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 9 Affirmative All 2 Affirmative with Comments 4 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Ankele, Donald W. Add Type TC cable to (C)(1) as it is a permitted Zone 2 wiring method. Wirfs, Mark C. None. Negative with Comment

146 45 of 270 4/16/ :12 AM Blais, Steven J. Type TC-ER-HL is not a flexible cord or flexible cable. Flexible cords and flexible cables are covered in Article 400. Burns, Dave Section (B) was only for controls and instruments and the requirements for power circuits should remain separate. The 3 Amp and 120 Volt limitation should remain for controls and instrumentation applications. A specific type of interlocked instrument receptacle that cannot be unplugged while energized should be required to eliminate the issues documented in the negative statements for FR 3967 and FR The requirements for controls and instrumentation and Power should not be comingled in the same section. The statement only necessary receptacles is vague and unenforceable and should be deleted. McBride, William E. Section (B) was only for controls and instruments and the requirements for power circuits should remain separate. The 3 Amp and 120 Volt limitation should remain for controls and instrumentation applications. A specific type of interlocked instrument receptacle that cannot be unplugged while energized should be required to eliminate the issues documented in the negative statements for FR 3967 and FR The requirements for controls and instrumentation and Power should not be comingled in the same section. The statement only necessary receptacles is vague and unenforceable Simmons, John L. This revision permits "plug and play" installations which would indicate the purpose is to allow personnel with a lower level of knowledge to connect and disconnect the instrumentation. There is no guarantee that the cable will ever be supported as required in Article 336. The phrase "in industrial establishments with restricted public access, where the conditions of maintenance and supervision ensure that only qualified persons service the installation" adds nothing to warrant an exception to the restrictions placed on these installations in the current NEC. Why are we creating code language that is subjective and ambiguous with terms that are not defined in the National Electrical Code? What is an industrial establishment? How does restricted public access make an installation more secure? Does the restricted access mean that fewer people will be hurt if something goes wrong? Are there some industrial locations that allow public access and others that do not? Who determines how much public access is allowed to comply with this relaxed requirement? Who will monitor the access? The parent text requirements found in this section are there because hazardous gases or vapors may be present in explosive mixtures, how does restricting public access improve safety or make it less dangerous than other, non-industrial, locations? Does the phrase where conditions of maintenance and supervision ensure that only qualified persons service the installation make sense? How can conditions of maintenance ensure what qualified persons do? While the NEC does provide a very loose definition of a qualified person, does the fact that a facility that is designated an industrial location ensure that installation and maintenance personnel are qualified to safely install electrical equipment in hazardous locations? It is a mistake to relax any Code requirement with the belief that by loosely defining a type of facility, restricting public access and stating that some condition of maintenance will ensure that qualified person will service the location. How will the fact that qualified persons are servicing the installation prevent a fire or explosion if there is a failure of the equipment or an accident? If a wiring application is safe for a Class I, Division 1 location in a location classified as an Industrial establishment, why isn t the application safe for a non-industrial location? The whole concept of an industrial location as currently used and as proposed herein is not defined and loosely restricted. This language is confusing and unenforceable. Requiring a label that does not reduce or eliminate the hazard in a Class 1, Zone 1 location might not prevent a worker from plugging or unplugging equipment under load. There is always the possibility that an explosive concentration can exist and someone may unplug an instrument under load. The purpose of the National Electrical Code is to protect persons and property from the hazard arising from the use of electricity, this language does not provide for that (B)(6) should be deleted.

147 46 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] Increased Safety e Motors and Generators. In Class I, Zone 1 locations, Increased Safety increased safety e motors and generators of all voltage ratings shall be listed for Zone 1 locations, and shall comply with all of the following: (1) Motors shall be marked with the current ratio, IA/IN, and time, te. (2) Motors shall have controllers marked with the model or identification number, output rating (horsepower or kilowatt), full-load amperes, starting current ratio (IA/IN), and time (te) of the motors that they are intended to protect; the controller marking shall also include the specific overload protection type (and setting, if applicable) that is listed with the motor or generator. (3) Connections shall be made with the specific terminals listed with the motor or generator. (4) Terminal housings shall be permitted to be of substantial, nonmetallic, nonburning material, provided an internal grounding means between the motor frame and the equipment grounding connection is incorporated within the housing. (5) The provisions of Part III of Article 430 shall apply regardless of the voltage rating of the motor. (6) The motors shall be protected against overload by a separate overload device that is responsive to motor current. This device shall be selected to trip or shall be rated in accordance with the listing of the motor and its overload protection. (7) Sections (C) and shall not apply to such motors. (8) The motor overload protection shall not be shunted or cut out during the starting period. Informational Note: Reciprocating engine-driven generators, compressors, and other equipment installed in Class I, Zone 2 locations may present a risk of ignition of flammable materials associated with fuel, starting, compression, and so forth, due to inadvertent release or equipment malfunction by the engine ignition system and controls. For further information on the requirements for ignition systems for reciprocating engines installed in Class I, Zone 2 hazardous (classified) locations, see ANSI/ISA UL :2014, General Requirements for Electrical Ignition Systems for Internal Combustion Engines in Class I, Division 2 or Zone 2, Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 10:11:08 EST 2015 Committee Statement Committee Statement: Standards title revised and renumbered. Response Message: Public Input No NFPA [Section No ] Ballot Results This item has passed ballot

148 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 47 of 270 4/16/ :12 AM

149 48 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] Scope. This article covers the requirements for the zone classification system as an alternative to the division classification system covered in Article 500, Article 502, and Article 503 for electrical and electronic equipment and wiring for all voltages in Zone 20, Zone 21, and Zone 22 hazardous (classified) locations where fire and explosion hazards may exist due to combustible dusts or ignitible fibers/flyings. Informational Note No. 1: For the requirements for electrical and electronic equipment and wiring for all voltages in Class I, Division 1 or Division 2; Class II, Division 1 or Division 2; Class III, Division 1 or Division 2; and Class I, Zone 0 or Zone 1 or Zone 2 hazardous (classified) locations where fire or explosion hazards may exist due to flammable gases or vapors, flammable liquids, or combustible dusts or fibers, refer to Articles 500 through 505. Informational Note No. 2: Zone 20, Zone 21, and Zone 22 area classifications are based on the modified IEC area classification system as defined in ANSI/ISA ( )-2004, Electrical Apparatus for Use in Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations Classification of Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations. ANSI/ISA ( ) 2013, Explosive Atmospheres Part 10 2: Classification of Areas Combustible Dust Atmospheres. Informational Note No. 3: The unique hazards associated with explosives, pyrotechnics, and blasting agents are not addressed in this article. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 09:21:14 EST 2015 Committee Statement Committee Statement: Response Message: The reference to ANSI/ISA ( )-2004 has been updated to the current document ANSI/ISA ( ) Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey

150 Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 49 of 270 4/16/ :12 AM

151 First Revision No NFPA [ Definition: Associated Nonincendive Field Wiring Apparatus. ] Associated Nonincendive Field Wiring Apparatus [as applied to Hazardous (Classified) Locations]. Apparatus in which the circuits are not necessarily nonincendive themselves but that affect the energy in nonincendive field wiring circuits and are relied upon to maintain nonincendive energy levels. Such apparatus are one of the following: (1) Electrical apparatus that has an alternative type of protection for use in the appropriate hazardous (classified) location (2) Electrical apparatus not so protected that shall not be used in a hazardous (classified) location Informational Note: Associated nonincendive field wiring apparatus has designated associated nonincendive field wiring apparatus connections for nonincendive field wiring apparatus and may also have connections for other electrical apparatus. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:46:39 EST 2015 Committee Statement Committee Statement: The term Associated Nonincendive Field Wiring Apparatus appears in Article 500. It is also used in the definition of Control Diagram which has a PI to be relocated to Article 100. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words (as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [New Definition after Definition: Attachment Plug (Plug Cap)...] Public Input No NFPA [Definition: Associated Nonincendive Field Wiring Apparatus.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey 50 of 270 4/16/ :12 AM

152 Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 51 of 270 4/16/ :12 AM

153 First Revision No NFPA [ Definition: Combustible Dust. ] Combustible Dust. Moved by FR-3903 Dust particles that are 500 microns or smaller (material passing a U.S. No. 35 Standard Sieve as defined in ASTM E 11-09, Standard Specification for Wire Cloth and Sieves for Testing Purposes ) and present a fire or explosion hazard when dispersed and ignited in air. Informational Note: See ASTM E a, Standard Test Method for Explosibility of Dust Clouds, or ISO , Explosion protection systems Part 1: Determination of explosion indices of combustible dusts in air, for procedures for determining the explosibility of dusts. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 10:33:36 EST 2015 Committee Statement Committee Statement: The term "Combustible Dust" is used in Articles 500, 502, 504, 505, 506, and 516. The definition of this term has been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Response Message: Public Input No NFPA [Definition: Combustible Dust.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave 52 of 270 4/16/ :12 AM

154 53 of 270 4/16/ :12 AM Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

155 First Revision No NFPA [ Definition: Dust-Ignitionproof. ] Dust-Ignitionproof. Equipment enclosed in a manner that excludes dusts and does not permit arcs, sparks, or heat otherwise generated or liberated inside of the enclosure to cause ignition of exterior accumulations or atmospheric suspensions of a specified dust on or in the vicinity of the enclosure. Informational Note: For further information on dust-ignitionproof enclosures, see Type 9 enclosure in ANSI/NEMA , Enclosures for Electrical Equipment, and ANSI/UL , Explosionproof and Dust-Ignitionproof Electrical Equipment for Hazardous (Classified) Locations. Submitter Information Verification Moved by FR-3908 Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 11:30:39 EST 2015 Committee Statement Committee Statement: Response Message: The term Dust-Ignitionproof is used in Articles 500, 502, and 506. The definition of this term has been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Public Input No NFPA [Definition: Dust-Ignitionproof.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave 54 of 270 4/16/ :12 AM

156 55 of 270 4/16/ :12 AM Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

157 First Revision No NFPA [ Definition: Dusttight. ] Dusttight. Enclosures constructed so that dust will not enter under specified test conditions. Informational Note: See ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Moved by FR-3911 Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 13:47:48 EST 2015 Committee Statement Committee Statement: The term is already defined in Article 100. Response Message: Public Input No NFPA [Definition: Dusttight.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan 56 of 270 4/16/ :12 AM

158 57 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

159 58 of 270 4/16/ :12 AM First Revision No NFPA [ Definition: Pressurized. ] Pressurized [as applied to Hazardous (Classified) Locations]. The process of supplying an enclosure with a protective gas with or without continuous flow, at sufficient pressure to prevent the entrance of combustible dust or ignitible fibers/flyings. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:49:24 EST 2015 Committee Statement Committee Statement: The term Pressurized appears in Articles 501, 505, 506, and 326. The definition is currently in but should be relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. The proposed addition of the words (as applied to Hazardous (Classified) Locations) will make it clear that the definition pertains to Articles 500 through 516 as applicable. Response Message: Public Input No NFPA [Definition: Pressurized.] Public Input No NFPA [New Definition after Definition: Qualified Person.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G.

160 Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code. 59 of 270 4/16/ :12 AM

161 First Revision No NFPA [ Definitions (506.2): Nonincendiv... to Nonincendiv... ] Nonincendive Circuit. A circuit, other than field wiring, in which any arc or thermal effect produced under intended operating conditions of the equipment is not capable, under specified test conditions, of igniting the flammable gas air, vapor air, or dust air mixture. Informational Note: Conditions are described in ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Moved by FR-3914 Nonincendive Equipment. Equipment having electrical/electronic circuitry that is incapable, under normal operating conditions, of causing ignition of a specified flammable gas air, vapor air, or dust air mixture due to arcing or thermal means. Informational Note: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Nonincendive Field Wiring. Wiring that enters or leaves an equipment enclosure and, under normal operating conditions of the equipment, is not capable, due to arcing or thermal effects, of igniting the flammable gas air, vapor air, or dust air mixture. Normal operation includes opening, shorting, or grounding the field wiring. Nonincendive Field Wiring Apparatus. Apparatus intended to be connected to nonincendive field wiring. Informational Note: For further information, see ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 14:08:54 EST 2015 Committee Statement Committee Statement: The term Nonincendive Circuit is used in Articles 500, 501, 502, and 506. The term Nonincendive Equipment is used in Articles 500, 506, and 516. The term Nonincendive Field Wiring is used in Articles 500, 501, 502, 503, 504, and 506. The term Nonincendive Field Wiring Apparatus is used in Articles 500 and 506. The definitions of these terms have been relocated to Article 100 to comply with Section of the 2011 NEC Style Manual. Response Message: Public Input No NFPA [Definition: Nonincendive Field Wiring.] Public Input No NFPA [Definition: Nonincendive Field Wiring Apparatus.] Public Input No NFPA [Definition: Nonincendive Equipment.] Public Input No NFPA [Definition: Nonincendive Circuit.] 60 of 270 4/16/ :12 AM

162 61 of 270 4/16/ :12 AM Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 12 Affirmative All 2 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Retain the defined terms with a reference to see Article 100 for the actual definition. This will help the user in applying Articles 500 through 504 and 510 through 516. Wirfs, Mark C. None. Negative with Comment Kines, Haywood Definitions that are only applicable to Chapter 5 need to remain within the.2 sections within the Articles in Chapter 5 so that the information needed for the user is readily available. Relocating the definitions to Article 100 and adding the text (as applied to Hazardous (Classified) Locations) so users will understand the definitions only apply to Articles in Chapter 5 unnecessarily expands the text in Article 100 and does add any benefit to the Electrical industry using the National Electrical Code.

163 First Revision No NFPA [ Definitions (506.2): Protection... to Protection... ] Protection by Encapsulation m. m. Type of protection where electrical parts that could cause ignition of a mixture of combustible dust or fibers/flyings in air are protected by enclosing them in a compound in such a way that the explosive atmosphere cannot be ignited. Informational Note No. 1: For additional information, see ANSI/ISA ( )-2009, Explosive atmospheres Part 18: Equipment protection by encapsulation m ; ANSI/UL , Explosive atmospheres Part 18: Equipment protection by encapsulation m ; and ANSI/ISA ( )-2011, Electrical Apparatus for Use in Zone 20, Zone 21 and Zone 22 Hazardous (Classified) Locations Protection by Encapsulation m. Informational Note No. 2: Encapsulation is designated level of protection mad or ma for use in Zone 20 locations. Encapsulation is designated level of protection mbd or mb for use in Zone 21 locations. Encapsulation is designated type of protection mc for use in Zone 22 locations. Protection by Enclosure t. t. Type of protection for explosive dust atmospheres where electrical apparatus is provided with an enclosure providing dust ingress protection and a means to limit surface temperatures. Informational Note No. 1: For additional information, see ANSI/ISA ( )-2009, Explosive Atmospheres Part 31: Equipment Dust Ignition Protection by Enclosure t ; and ANSI/ISA ( )-2011, Electrical Apparatus for Use in Zone 21 and Zone 22 Hazardous (Classified) Locations Protection by Enclosure t. Informational Note No. 2: Protection by enclosure is designated level of protection ta for use in Zone 20 locations. Protection by enclosure is designated level of protection tb or td for use in Zone 21 locations. Protection by enclosure is designated level of protection tc or td for use in Zone 22 locations. Protection by Intrinsic Safety id. i. Type of protection where any spark or thermal effect is incapable of causing ignition of a mixture of combustible dust, fibers, or flyings in air under prescribed test conditions. Informational Note No. 1: For additional information, see ANSI/ISA ( )-2011, Electrical Apparatus for Explosive Gas Atmospheres Part 11: intrinsic safety i ; ANSI/UL , Electrical Apparatus for Explosive Gas Atmospheres Part 11: Intrinsic safety i ; and ANSI/ISA ( )-2011, Electrical Apparatus for Use in Zone 20, Zone 21 and Zone 22 Hazardous (Classified) Locations Protection by Intrinsic Safety i. Informational Note No. 2: Intrinsic safety is designated level of protection iad or ia for use in Zone 20 locations. Intrinsic safety is designated level of protection ibd or ib for use in Zone 21 locations. Intrinsic safety is designated type of protection ic for use in Zone 22 locations. Protection by Pressurization pd. p. Type of protection that guards against the ingress of a mixture of combustible dust or fibers/flyings in air into an enclosure containing electrical equipment by providing and maintaining a protective gas atmosphere inside the enclosure at a pressure above that of the external atmosphere. Informational Note: For additional information, see ANSI/ISA ( )-2006, Electrical Apparatus for Use in Zone 21 and Zone 22 Hazardous (Classified) Locations Protection by Pressurization pd. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: 62 of 270 4/16/ :12 AM

164 63 of 270 4/16/ :12 AM Submittal Date: Mon Jan 12 16:48:39 EST 2015 Committee Statement Committee Statement: Response Message: The periods in the term headers should be outside of the quotes and not inside. The terms "id" and "pd" were changed to "i" and "p" to refer to the generic usage of these concepts. Public Input No NFPA [Definition: Protection by Encapsulation m. ] Public Input No NFPA [Definition: Protection by Enclosure t. ] Public Input No NFPA [Definition: Protection by Intrinsic Safety id. ] Public Input No NFPA [Definition: Protection by Pressurization pd. ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Update the reference to ANSI/UL to 2015 and add the reference to ANSI/UL :2015 under protection by enclosure "t". Wirfs, Mark C. None.

165 Haz... ] First Revision No NFPA [ Definitions (506.2): Zone 20 Haz... to Zone 22 Zone 20 Hazardous (Classified) Location. An area where combustible dust or ignitible fibers/flyings are present continuously or for long periods of time in quantities sufficient to be hazardous, as classified by 506.5(B)(1). Zone 21 Hazardous (Classified) Location. An area where combustible dust or ignitible fibers/flyings are likely to exist occasionally under normal operation in quantities sufficient to be hazardous, as classified by 506.5(B)(2). Zone 22 Hazardous (Classified) Location. An area where combustible dust or ignitible fibers/flyings are not likely to occur under normal operation in quantities sufficient to be hazardous, as classified by 506.5(B)(3). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 15:52:23 EST 2015 Committee Statement Committee Statement: 506.5(B) fully describes these terms. The definitions are not necessary. Response Message: Public Input No NFPA [New Definition after Definition: Weatherproof.] Public Input No NFPA [Definition: Zone 21 Hazardous (Classified) Location.] Public Input No NFPA [Definition: Zone 20 Hazardous (Classified) Location.] Public Input No NFPA [Definition: Zone 22 Hazardous (Classified) Location.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. 64 of 270 4/16/ :12 AM

166 Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. None. 65 of 270 4/16/ :12 AM

167 First Revision No NFPA [ Section No (B) ] (B) Reference Standards. Important information relating to topics covered in Chapter 5are can be found in other publications. Informational Note No. 1: It is important that the authority having jurisdiction be familiar with the recorded industrial experience as well as with standards of the National Fire Protection Association (NFPA), the International Society of Automation (ISA), and the International Electrotechnical Commission (IEC) that may be of use in the classification of various locations, the determination of adequate ventilation, and the protection against static electricity and lightning hazards. Informational Note No. 2: For additional information concerning the installation of equipment utilizing optical emissions technology (such as laser equipment) that could potentially become an ignition source in hazardous (classified) locations, see ANSI/ISA ( )-2013, Explosive Atmospheres Part 28: Protection of equipment and transmission systems using optical radiation. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:36:08 EST 2015 Committee Statement Committee Statement: Response Message: An informational note has been provided to clarify potential risk of ignition from electrical equipment utilizing optical emissions technology. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. 66 of 270 4/16/ :12 AM

168 Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Affirmative with Comment Wirfs, Mark C. None. Negative with Comment Wechsler, David B. Regarding Informational Note 2: While potential risks of ignition from electrical equipment utilizing optical emissions technology may exist, the design and use of suitable electrical equipment used in hazardous classified locations is already addressed in the NEC. Optical emissions are not within the scope of the NEC. Therefore there is no need to include this reference in the NEC. 67 of 270 4/16/ :12 AM

169 68 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(1) ] (1) Zone 20. A Zone 20 location is a location in which either of the following occur: (1) Ignitible concentrations of combustible dust or ignitible fibers/flyings are present continuously. (2) Ignitible concentrations of combustible dust or ignitible fibers/flyings are present for long periods of time. Informational Note No. 1: As a guide to classification of Zone 20 locations, refer to ANSI/ISA ( )-2004, Electrical Apparatus for Use in Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations Classification of Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations ( )-2013, Explosive Atmospheres Part 10-2: Classification of areas Combustible dust atmospheres. Informational Note No. 2: Zone 20 classification includes locations inside dust containment systems; hoppers, silos, etc., cyclones and filters, dust transport systems, except some parts of belt and chain conveyors, etc.; blenders, mills, dryers, bagging equipment, etc. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 10:15:00 EST 2015 Committee Statement Committee Statement: Standard has been revised and renumbered. Response Message: Public Input No NFPA [Section No (B)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W.

170 Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. The Task Group developed the change of the (A) title to GENERAL based on applicability and context coverage for 500.5(A). They FAILED to do the SAME for (A) and 506.5(A). The same logic and style manual basis applies and this should have been ALSO changed. We need to modify the 505.6(A) title to GENERAL. 69 of 270 4/16/ :12 AM

171 70 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(2) ] (2) Zone 21. A Zone 21 location is a location where one of the following apply: (1) In which ignitible Ignitible concentrations of combustible dust or ignitible fibers/flyings are likely to exist occasionally under normal operating conditions; or (2) In which ignitible Ignitible concentrations of combustible dust or ignitible fibers/flyings may exist frequently because of repair or maintenance operations or because of leakage; or (3) In which equipment Equipment is operated or processes are carried on, of such a nature that equipment breakdown or faulty operations could result in the release of ignitible concentrations of combustible dust or ignitible fibers/flyings and also cause simultaneous failure of electrical equipment in a mode to cause the electrical equipment to become a source of ignition; or (4) That is adjacent Adjacent to a Zone 20 location from which ignitible concentrations of dust or ignitible fibers/flyings could be communicated, unless communication is prevented by adequate positive pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided. Informational Note No. 1: As a guide to classification of Zone 21 locations, refer to ANSI/ISA ( )-2004, Electrical Apparatus for Use in Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations Classification of Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations ( )-2013, Explosive Atmospheres Part 10-2: Classification of areas Combustible dust atmospheres. Informational Note No. 2: This classification usually includes locations outside dust containment and in the immediate vicinity of access doors subject to frequent removal or opening for operation purposes when internal combustible mixtures are present; locations outside dust containment in the proximity of filling and emptying points, feed belts, sampling points, truck dump stations, belt dump over points, etc., where no measures are employed to prevent the formation of combustible mixtures; locations outside dust containment where dust accumulates and where due to process operations the dust layer is likely to be disturbed and form combustible mixtures; locations inside dust containment where explosive dust clouds are likely to occur (but neither continuously, nor for long periods, nor frequently) as, for example, silos (if filled and/or emptied only occasionally) and the dirty side of filters if large self-cleaning intervals are occurring. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 10:16:07 EST 2015 Committee Statement Committee Statement: Standard has been revised and renumbered. Response Message: Public Input No NFPA [Section No (B)(2)] Ballot Results This item has passed ballot

172 71 of 270 4/16/ :12 AM 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

173 72 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(3) ] (3) Zone 22. A Zone 22 location is a location where one of the following apply: (1) In which ignitible Ignitible concentrations of combustible dust or ignitible fibers/flyings are not likely to occur in normal operation and, if they do occur, will only persist for a short period; or (2) In which combustible Combustible dust or fibers/flyings are handled, processed, or used but in which the dust or fibers/flyings are normally confined within closed containers of closed systems from which they can escape only as a result of the abnormal operation of the equipment with which the dust or fibers/flyings are handled, processed, or used; or (3) That is adjacent Adjacent to a Zone 21 location, from which ignitible concentrations of dust or fibers/flyings could be communicated, unless such communication is prevented by adequate positive pressure ventilation from a source of clean air and effective safeguards against ventilation failure are provided. Informational Note No. 1: As a guide to classification of Zone 22 locations, refer to ANSI/ISA ( )-2004, Electrical Apparatus for Use in Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations Classification of Zone 20, Zone 21, and Zone 22 Hazardous (Classified) Locations ( )-2013, Explosive Atmospheres Part 10-2: Classification of areas Combustible dust atmospheres. Informational Note No. 2: Zone 22 locations usually include outlets from bag filter vents, because in the event of a malfunction there can be emission of combustible mixtures; locations near equipment that has to be opened at infrequent intervals or equipment that from experience can easily form leaks where, due to pressure above atmospheric, dust will blow out; pneumatic equipment, flexible connections that can become damaged, etc.; storage locations for bags containing dusty product, since failure of bags can occur during handling, causing dust leakage; and locations where controllable dust layers are formed that are likely to be raised into explosive dust air mixtures. Only if the layer is removed by cleaning before hazardous dust air mixtures can be formed is the area designated unclassified. Informational Note No. 3: Locations that normally are classified as Zone 21 can fall into Zone 22 when measures are employed to prevent the formation of explosive dust air mixtures. Such measures include exhaust ventilation. The measures should be used in the vicinity of (bag) filling and emptying points, feed belts, sampling points, truck dump stations, belt dump over points, etc. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 10:16:46 EST 2015 Committee Statement Committee Statement: Standard has been revised and renumbered. Response Message: Public Input No NFPA [Section No (B)(3)] Ballot Results

174 73 of 270 4/16/ :12 AM This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

175 74 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B) ] (B) Listing. (1) Equipment that is listed for Zone 20 shall be permitted in a Zone 21 or Zone 22 location of the same dust or ignitible fiber/flying. Equipment that is listed for Zone 21 may be used in a Zone 22 location of the same dust or ignitible fiber/flying. (2) Equipment shall be permitted to be listed for a specific dust or ignitible fiber/flying or any specific combination of dusts or ignitible fibers/flyings. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 08:57:12 EST 2015 Committee Statement Committee Statement: Editorial to correct grammatical error. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E.

176 75 of 270 4/16/ :12 AM Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Delete 506.9(B)(2) as there are no testing, approval or area classification requirements that address one specific dust or fiber/flying. Wirfs, Mark C. NONE>

177 76 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C)(2) ]

178 77 of 270 4/16/ :12 AM (2) Zone Equipment.

179 78 of 270 4/16/ :12 AM Equipment meeting one or more of the protection techniques described in shall be marked with the following in the order shown: (1) Zone (2) Symbol AEx (3) Protection technique(s) in accordance with Table 506.9(C)(2)(3) (4) Material group in accordance with or a specific dust or ignitible fiber/flying or a specific combination thereof (5) Maximum surface temperature in accordance with 506.9(D), marked as a temperature value in degrees C, preceded by T and followed by the symbol C (6) Ambient temperature marking in accordance with 506.9(D) Informational Note: The EPL (or equipment protection level) may can appear in the product marking. EPLs are designated as G for gas, D for dust, or M for mining, and are then followed by a letter (a, b, or c) to give the user a better understanding as to whether the equipment provides either (a) a very high, (b) a high, or (c) an enhanced level of protection against ignition of an explosive atmosphere. For example, an a Zone 21 AEx pb IIIB T165 C motor (which is suitable by protection concept for application in Zone 21) may can additionally be marked with an EPL of Db, Zone 21 AEx p IIIB T165 C Db. Exception: Associated apparatus NOT suitable for installation in a hazardous (classified) location shall be required to be marked only with 506.9(C)(2)(2), and (3), and where applicable (5 4 ), but BOTH the symbol AEx in 506.9(C)(2)(2) and the symbol for the type of protection in 506.9(C)(2)(3) shall be enclosed within the same square brackets; for example, [AEx iad] or [AEx ia] IIIC. Table 506.9(C)(2)(3) Types of Protection Designation Designation Technique Zone* iad Protection by intrinsic safety 20 ia Protection by intrinsic safety 20 ibd Protection by intrinsic safety 21 ib Protection by intrinsic safety 21 ic Protection by intrinsic safety 22 [iad] Associated apparatus Unclassified** [ia] Associated apparatus Unclassified** [ibd] Associated apparatus Unclassified** [ib] Associated apparatus Unclassified** [ic] Associated apparatus Unclassified** mad Protection by encapsulation 20 ma Protection by encapsulation 20 mbd Protection by encapsulation 21 mb Protection by encapsulation 21 mc Protection by encapsulation 22 pd Protection by pressurization 21 p Protection by pressurization 21 pb Protection by pressurization 21 td Protection by enclosures 21 ta Protection by enclosures 20 tb Protection by enclosures 21 tc Protection by enclosures 22 *Does not address use where a combination of techniques is used. **Associated apparatus is permitted to be installed in a hazardous (classified) location if suitably protected using another type of protection.

180 79 of 270 4/16/ :12 AM Informational Note: The D suffix on the type of protection designation was employed prior to the introduction of Group IIIA, IIIB, and IIIC; which is now used to distinguish between the type of protection employed for Group II (Gases) or Group III (Dusts). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 08:34:02 EST 2015 Committee Statement Committee Statement: Revised Item (4) to correlate the marking requirements with 506.9(B)(2). Zone 21 was inadvertently omitted from the example marking. The text contained within the parentheses was deleted as it is now redundant. The original text incorrectly refers to item (5) and omits item (4). Item (5) in the list refers to the Maximum Surface Temperature which is not relevant for Associated Apparatus that is not installed in a Hazardous (Classified) Location. Item (4) relates to the Material Group which is only applicable in the case of [AEx ia] IIIC, as equipment listed to the earlier editions marked with 'iad' did not require a material group to be marked. Response Message: Public Input No. 50-NFPA [Section No (C)(2)] Public Input No NFPA [Section No (C)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 10 Affirmative All 2 Affirmative with Comments 3 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Jones, Robert A.

181 Kines, Haywood Massey, L. Evans Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Revise 506.9(C)(2)(4) to revert back to the original text as there are no testing, approval or area classification requirements that address one specific dust or fiber/flying. Wirfs, Mark C. NONE> Negative with Comment Burns, Dave Need to remove the addition of the words "or a specific dust or ignitable fiber/flying or a specific combination thereof". This creates confusion for the installers and inspectors. The specific dust that the device is approved for will not likely appear on the label and will be only in the documentation. Current product standards do not permit the listing of specific dusts. Lawrence, Jr., William G. The revision to add "or a specific dust or ignitible fiber/flying or a specific combination thereof" should not be added. 1. The product standards supporting Article 506; ANSI/ISA and ANSI/UL do not include such a product marking. 2. IEC TC31 has made it quite clear that complete identification of a specific dust or fiber/flying would involve such detail that it is not practical. It is not as simple as identifying the chemical formula of a gas or vapor. Aspects such as the chemical formula or CAS number of each constituent, along with amount of percentage of each, the bulk density, and the particle density could all be important. 3. The product standards for dusts or fibers/flyings are based on particle size (for exclusion) and maximum surface temperature (for layer/cloud ignition). For a small portion of Intrinsic Safety, protection is based on limitation of available energy to initiate an explosion. The maximum permitted energy of ~160?J is very conservative for dust. 4. All known equipment can be accommodated within the requirements of the existing equipment standards. There is no need to add additional confusion as to what is and is not suitable. 5. At one time, there may have been a need due to the temperature restrictions of Table 500.8(D)(2), but that requirement was removed ~20 years ago. McBride, William E. Need to remove the addition of the words "or a specific dust or ignitable fiber/flying or a specific combination thereof". This creates confusion for the installers and inspectors. The specific dust that the device is approved for will not likely appear on the label and will be only in the documentation. Current product standards do not permit the listing of specific dusts. 80 of 270 4/16/ :12 AM

182 81 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(1) ] (1) Equipment Provided with Threaded Entries for NPT-Threaded Conduit or Fittings. For equipment provided with threaded entries for NPT-threaded conduit or fittings, listed conduit fittings or listed cable fittings shall be used. All NPT-threaded conduit and fittings referred to herein shall be threaded with a National (American) Standard Pipe Taper (NPT) thread. Informational Note: Thread specifications for NPT threads are located in ANSI/ASME B , Pipe Threads, General Purpose (Inch). Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 13:09:19 EST 2015 Committee Statement Committee Statement: Section of the 2011 NEC Style Manual states that words and terms shall avoid colloquial language. Specifically, the word herein is cited as a word that can be removed without affecting clarity. With the removal of this text, clarity is unaffected. The reference was updated. Response Message: Public Input No NFPA [Section No (E)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 1 Affirmative with Comments 1 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave

183 82 of 270 4/16/ :12 AM Jones, Robert A. Kines, Haywood Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE> Negative with Comment Lawrence, Jr., William G. (2) should not appear. 1. The product standards supporting Article 506; ANSI/ISA and ANSI/UL do not include such a product marking. 2. IEC TC31 has made it quite clear that complete identification of a specific dust or fiber/flying would involve such detail that it is not practical. It is not as simple as identifying the chemical formula of a gas or vapor. Aspects such as the chemical formula or CAS number of each constituent, along with amount of percentage of each, the bulk density, and the particle density could all be important. 3. The product standards for dusts or fibers/flyings are based on particle size (for exclusion) and maximum surface temperature (for layer/cloud ignition). For a small portion of Intrinsic Safety, protection is based on limitation of available energy to initiate an explosion. The maximum permitted energy of ~160?J is very conservative for dust. 4. All known equipment can be accommodated within the requirements of the existing equipment standards. There is no need to add additional confusion as to what is and is not suitable. 5. At one time, there may have been a need due to the temperature restrictions of Table 500.8(D)(2), but that requirement was removed ~20 years ago.

184 83 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(2) ] (2) Equipment Provided with Threaded Entries for Metric-Threaded Conduit or Fittings. For equipment with metric-threaded entries, listed conduit fittings or listed cable fittings shall be used. Such entries shall be identified as being metric, or listed adapters to permit connection to conduit or NPT-threaded fittings shall be provided with the equipment and shall be used for connection to conduit or NPT-threaded fittings. Metric-threaded fittings installed into equipment entries shall be made up with at least five threads fully engaged. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 08:44:46 EST 2015 Committee Statement Committee Statement: Sections and require conduit to be threaded with NPT threads and do not permit metric threaded conduit. Additional text added to clarify that the requirement for thread engagement is between threaded equipment entries and threaded fittings. Response Message: Public Input No NFPA [Section No (E)(2)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 13 Affirmative All 2 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G.

185 Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Ankele, Donald W. Add the words "wrench tight" at the end of the paragraph. Wirfs, Mark C. NONE> 84 of 270 4/16/ :12 AM

186 85 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (F) ] (F) Optical Fiber Cables. Where an An optical fiber cable contains conductors that are capable of carrying current, with or without current-carrying conductors (composite optical fiber cable), the optical fiber cable shall be installed to address the associated fire hazard and sealed to address the associated explosion hazard in accordance with the requirements of Articles and Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:25:29 EST 2015 Committee Statement Committee Statement: Response Message: The revised text clarifies that the cable needs to be sealed for explosion hazard and address the fire hazards, regardless if the cable contains current carrying conductors or not. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans

187 86 of 270 4/16/ :12 AM McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

188 87 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C) ] (C) Zone 22. In Zone 22 locations, the following wiring methods shall be permitted. : (1) All wiring methods permitted in (B). (2) Rigid metal conduit, intermediate metal conduit, electrical metallic tubing, dusttight wireways. (3) Type MC or MI cable with listed termination fittings. (4) Type PLTC and Type PLTC-ER cable in accordance with the provisions of Article 725, including installation in cable tray systems. The cable shall be terminated with listed fittings. (5) Type ITC and Type ITC-ER cable as permitted in and terminated with listed fittings. (6) Type MC, MI, MV, TC, or TC-ER cable installed in ladder, ventilated trough, or ventilated channel cable trays in a single layer, with a space not less than the larger cable diameter between two adjacent cables, shall be the wiring method employed. Single-conductor Type MV cables shall be shielded or metallic armored. The cable shall be terminated with listed fittings. (7) Intrinsic safety type of protection ic shall be permitted using any of the wiring methods permitted for unclassified locations. Intrinsic safety type of protection ic systems shall be installed in accordance with the control drawing(s). Simple apparatus, not shown on the control drawing, shall be permitted in a circuit of intrinsic safety type of protection ic, provided that the simple apparatus does not interconnect the intrinsic safety type of protection ic circuit to any other circuit. Informational Note: The term Simple Apparatus is defined in Separation of circuits of intrinsic safety type of protection ic shall be in accordance with one of the following: a. Be in separate cables b. Be in multiconductor cables where the conductors of each circuit are within a grounded metal shield c. Be in multiconductor cables where the conductors have insulation with a minimum thickness of 0.25 mm (0.01 in.) (8) Boxes and fittings shall be dusttight. (9) Optical fiber cable Types OFNP, OFCP, OFNR, OFCR, OFNG, OFCG, OFN, and OFC shall be permitted to be installed in cable trays or any raceway in accordance with (C). Optical fiber cables shall be sealed in accordance with (10) Cablebus. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:10:29 EST 2015 Committee Statement Committee Statement: Cablebus per Article 370 provides a level of safety equivalent to the other wiring methods permitted for the identified locations.

189 88 of 270 4/16/ :12 AM Response Message: Public Input No NFPA [Section No (C)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

190 89 of 270 4/16/ :12 AM First Revision No NFPA [ Section No [Excluding any Sub-Sections] ] Where Class I liquids or gaseous fuels are stored, handled, or transferred, electrical wiring and electrical utilization equipment shall be designed in accordance with the requirements for Class I, Division 1 or 2 hazardous (classified) locations as classified in accordance with and 500.6, and this article. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition that has no openings. [30A:8.3.5, , ] Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:39:53 EST 2015 Committee Statement Committee Statement: The extract was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E.

191 90 of 270 4/16/ :12 AM Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

192 91 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (C) ] (C) Major Repair Garages, Major and Minor.

193 92 of 270 4/16/ :12 AM Where flammable liquids having a flash point below 38 C (100 F) such as gasoline, or gaseous fuels such as natural gas, hydrogen, or LPG, will not be dispensed, but repair activities that involve the transfer of such fluids or gases are performed, the classification rules in (1), (2), and (3) shall apply. Where vehicles using Class I liquids or heavier-than-air gaseous fuels (such as LPG) are repaired, hazardous area classification guidance is found in Table 511.3(C). Informational Note: For additional information, see NFPA 30A -2015, Code for Motor Fuel Dispensing Facilities and Repair Garages, Table Table 511.3(C) Extent of Classified Locations for Major and Minor Repair Garages with Heavier-Than-Air Fuel Location Repair garage, major (where Class I liquids or gaseous fuels are transferred or dispensed*) Specific areas adjacent to classified locations Repair garage, minor (where Class I liquids or gaseous fuels are not transferred or dispensed1) Division (Group D) Class I Zone (Group IIA) Unclassified Unclassified 2 2 Unclassified Unclassified Unclassified Unclassified Extent of Classified Location Entire space within any pit, belowgrade work area, or subfloor work area that is not ventilated Entire space within any pit, belowgrade work area, or subfloor work area that is provided with ventilation of at least 0.3 m 3 /min/m 2 (1 ft 3 /min/ft 2 ) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level Up to 450 mm (18 in.) above floor level of the room, except as noted below, for entire floor area Up to 450 mm (18 in.) above floor level of the room where room is provided with ventilation of at least 0.3 m 3 /min/m 2 (1 ft 3 /min/ft 2 ) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level Within 0.9 m (3 ft) of any fill or dispensing point, extending in all directions Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour or designed with positive air pressure or where effectively cut off by walls or partitions Entire space within any pit, belowgrade work area, or subfloor work area that is not ventilated Up to 450 mm (18 in.) above floor level, extending 0.9 m (3 ft) horizontally in all directions from opening to any pit, belowgrade work area, or subfloor work area that is not ventilated Entire space within any pit, belowgrade work area, or subfloor work area that is provided with ventilation of at least 0.3 m 3 /min/m 2 (1 ft 3 /min/ft 2 ) of floor area, with suction taken from a point within 300 mm (12 in.) of floor level

194 93 of 270 4/16/ :12 AM Class I Location Specific areas adjacent to classified locations Division (Group D) Zone (Group IIA) Unclassified Unclassified Extent of Classified Location Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour or designed with positive air pressure, or where effectively cut off by walls or partitions *Includes draining of Class I liquids from vehicles. (1) Floor Areas. (0) Ventilation Provided. The floor area shall be unclassified where there is mechanical ventilation providing a minimum of four air changes per hour or 0.3 m 3 /min/m 2 (1 cfm/ft 2 ) of exchanged air for each square meter (foot) of floor area. Ventilation shall provide for air exchange across the entire floor area, and exhaust air shall be taken at a point within 0.3 m (12 in.) of the floor. (0) Ventilation Not Provided. The entire floor area up to a level of 450 mm (18 in.) above the floor shall be classified as Class I, Division 2 if the ventilation does not comply with 511.3(C)(1)(a). (1) Ceiling Areas. Where lighter-than-air gaseous fueled vehicles, such as vehicles fueled by natural gas or hydrogen, are repaired or stored, the area within 450 mm (18 in.) of the ceiling shall be considered for classification in accordance with (a) and (b). (0) Ventilation Provided. The ceiling area shall be unclassified where ventilation is provided, from a point not more than 450 mm (18 in.) from the highest point in the ceiling, to exhaust the ceiling area at a rate of not less than 0.3 m 3 /min/m 2 (1 cfm/ft 2 ) of ceiling area at all times that the building is occupied or when vehicles using lighter-than-air gaseous fuels are parked below this area. (0) Ventilation Not Provided. Ceiling areas that are not ventilated in accordance with 511.3(C)(2)(a) shall be classified as Class I, Division 2. (1) Pit Areas in Lubrication or Service Room. Any pit, belowgrade work area, or subfloor work area shall be classified as provided in (a) or (b). (0) Ventilation Provided. The pit area shall be a Class I, Division 2 location where there is mechanical ventilation providing a minimum of six air changes per hour. (0) Ventilation Not Provided. Where ventilation is not provided in accordance with 511.3(C)(3)(a), any pit or depression below floor level shall be a Class I, Division 1 location that extends up to the floor level. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 08:09:55 EST 2015

195 94 of 270 4/16/ :12 AM Committee Statement Committee Statement: Response Message: In order to align with NFPA 30A-2015, 511.3(C) is replaced in its entirety with a new 511.3(C) covering both major and minor repair garages where heavier than air gaseous Class I liquids are transferred or dispensed. The new Table 511.3(C) is a replica of the corresponding portion of Table of NFPA 30A in order to comply with the NEC Style Manual with regards to internal references that exist within the NFPA 30A table. An informational note was added to refer back to the original table in NFPA 30A. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

196 95 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (D) ] (D) Minor Repair Garages, Major. Where flammable liquids having a flash point below 38 C (100 F) such as gasoline, or gaseous fuels such as natural gas or hydrogen, will not be dispensed or transferred, the classification rules in (D)(1), (D)(2), and (D)(3) shall apply to the lubrication and service rooms. Where vehicles using lighter-than-air gaseous fuels (such as hydrogen and natural gas) are repaired or stored, hazardous area classification guidance is found in Table 511.3(D). Informational Note: For additional information see NFPA 30A -2015, Code for Motor Fuel Dispensing Facilities and Repair Garages, Table Table 511.3(D) Extent of Classified Locations for Major Repair Garages with Lighter-than-Air Fuel Class I Location Repair garage, major (where lighterthan-air gaseous fueled 1 vehicles are repaired or stored) Specific areas adjacent to classified locations Division 2 Zone 3 Extent of Classified Location 2 2 Within 450 mm (18 in.) of ceiling, except as noted below Unclassified Unclassified Unclassified Unclassified Within 450 mm (18 in.) of ceiling where ventilation of at least 0.3 m 3 /min/m 2 (1 ft 3 /min/ft 2 ) of floor area, with suction taken from a point within 450 mm (18 in.) of the highest point in the ceiling Areas adjacent to classified locations where flammable vapors are not likely to be released, such as stock rooms, switchboard rooms, and other similar locations, where mechanically ventilated at a rate of four or more air changes per hour or designed with positive air pressure, or where effectively cut off by walls or partitions 1 Includes fuels such as hydrogen and natural gas, but not LPG. 2 For hydrogen (lighter than air) Group B, or natural gas Group D. 3 For hydrogen (lighter than air) Group IIC or IIB+H2, or natural gas Group IIA. (1) Floor Areas. Floor areas in minor repair garages without pits, belowgrade work areas, or subfloor work areas shall be unclassified. Where floor areas include pits, belowgrade work areas, or subfloor work areas in lubrication or service rooms, the classification rules in (a) or (b) shall apply. (0) Ventilation Provided. The entire floor area shall be unclassified where there is mechanical ventilation providing a minimum of four air changes per hour or 0.3 m 3 /min/m 2 (1 cfm/ft 2 ) of exchanged air for each square meter (foot) of floor area. Ventilation shall provide for air exchange across the entire floor area, and exhaust air shall be taken at a point within 0.3 m (12 in.) of the floor. (0) Ventilation Not Provided. The floor area up to a level of 450 mm (18 in.) above any unventilated pit, belowgrade work area, or subfloor work area and extending a distance of 900 mm (3 ft) horizontally from the edge of any such pit, belowgrade work area, or subfloor work area, shall be classified as Class I, Division 2. (1) Ceiling Areas. Where lighter-than-air gaseous fuels (such as natural gas or hydrogen) will not be transferred, such locations shall be unclassified.

197 96 of 270 4/16/ :12 AM (1) Pit Areas in Lubrication or Service Room. Any pit, belowgrade work area, or subfloor work area shall be classified as provided in (a) or (b). (0) Ventilation Provided. Where ventilation is provided to exhaust the pit area at a rate of not less than 0.3 m 3 /min/m 2 (1 cfm/ft 2 ) of floor area at all times that the building is occupied, or when vehicles are parked in or over this area and where exhaust air is taken from a point within 300 mm (12 in.) of the floor of the pit, belowgrade work area, or subfloor work area, the pit shall be unclassified. [ 30A: Table 8.3.1] (0) Ventilation Not Provided. Where ventilation is not provided in accordance with 511.3(D)(3)(a), any pit or depression below floor level shall be a Class I, Division 2 location that extends up to the floor level. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Wed Jan 14 08:18:07 EST 2015 Committee Statement Committee Statement: Response Message: In order to align with NFPA 30A-2015, 511.3(D) is replaced in its entirety with a new 511.3(D) covering major repair garages where vehicles using lighter than air gaseous fuels are repaired or stored. The new Table 511.3(D) is a replica of the corresponding portion of Table of NFPA 30A in order to comply with the NEC Style Manual with regards to internal references that exist within the NFPA 30A table. An informational note was added to refer back to the original table in NFPA 30A. Notes were added to the table to apply the correct groups for hydrogen applications. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J.

198 Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE> 97 of 270 4/16/ :12 AM

199 98 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (E)(2) ] (2) Alcohol-Based Windshield Washer Fluid. The area used for storage, handling, or dispensing into motor vehicles of alcohol-based windshield washer fluid in repair garages shall be unclassified unless otherwise classified by a provision of [30A: , Exception] Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:43:46 EST 2015 Committee Statement Committee Statement: The extract was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan

200 99 of 270 4/16/ :12 AM Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

201 First Revision No NFPA [ New Section after ] Underground Wiring. Underground wiring shall be installed in threaded rigid metal conduit or intermediate metal conduit. Exception: Type PVC conduit, Type RTRC conduit, and Type HDPE conduit shall be permitted where buried under not less than 600 mm (2 ft) of cover. Where Type PVC conduit, Type RTRC conduit, or Type HDPE conduit is used, threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the aboveground raceway, and an equipment grounding conductor shall be included to provide electrical continuity of the raceway system and for grounding of non current-carrying metal parts. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:02:04 EST 2015 Committee Statement Committee Statement: This new section clarifies that Type PVC conduit, Type RTRC conduit, and Type HDPE conduit can be used where buried under not less than 2 ft of cover under a commercial garage. From the point of being under less than 2 ft of cover to where the conduit run terminates, the wiring methods set forth in Article 511 apply. Response Message: Public Input No NFPA [New Section after 511.7(B)(1)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 11 Affirmative All 2 Affirmative with Comments 2 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Ankele, Donald W. Blais, Steven J. Burns, Dave 00 of 270 4/16/ :12 AM

202 01 of 270 4/16/ :12 AM Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Wechsler, David B. Affirmative with Comment Bernsen, Marc J. Where PVC,RTRC and HDPE are used and buried under not less than 2 ft of cover. The requirment to be encased in 2" of concrete should be retained. There are locations in the mining and logging industies where a commercial garage may not have a concrete floor. Wirfs, Mark C. NONE> Negative with Comment Alexander, Harold G. Agree with John L Simmons comments. Simmons, John L. This new section will in some cases create unsafe conditions. The scope of Article 511 includes areas where repairs are made. This would include areas where repairs are made in spaces without concrete floors. The use of nonmetallic conduit in an area without a concrete floor and where heavy equipment is being repaired may introduce an unsafe condition in which the raceway may be broken due to the weight of the equipment and/or equipment that operates by traveling on tracks.

203 Eq... ] First Revision No NFPA [ Definitions (513.2): Mobile Equi... to Portable Mobile Equipment. Equipment with electrical components suitable to be moved only with mechanical aids or is provided with wheels for movement by person(s) or powered devices. Portable Equipment (as applied to Article 513). Equipment with electrical components suitable to be moved by a single person without mechanical aids. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Mon Jan 12 16:25:37 EST 2015 Committee Statement Committee Statement: Response Message: Both terms are used throughout the NEC and should be relocated to Article 100 in accordance with the NEC Style Manual. Public Input No NFPA [Definition: Mobile Equipment.] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood 02 of 270 4/16/ :12 AM

204 Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE> 03 of 270 4/16/ :12 AM

205 04 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(1) ]

206 05 of 270 4/16/ :12 AM (1) Class I Locations.

207 06 of 270 4/16/ :12 AM Table 514.3(B)(1) shall be applied where Class I liquids are stored, handled, or dispensed and shall be used to delineate and classify motor fuel dispensing facilities and commercial garages as defined in Article 511. Table shall be used for the purpose of delineating and classifying aboveground tanks. A Class I location shall not extend beyond an unpierced wall, roof, or other solid partition. [30A:8.1, 8.2, 8.3] Table 514.3(B)(1) Class I Locations Motor Fuel Dispensing Facilities Location Dispensing Device (except Overhead Type) 2, 3 Under dispenser containment Division (Group D) Zone (Group IIA) 1 1 Dispenser 2 2 Outdoor 2 2 Indoor - with mechanical ventilation with gravity ventilation 2 2 Dispensing Device Overhead Type Remote Pump Outdoor Extent of Classified Location 1 Entire space within and under dispenser pit or containment Within 450 mm (18 in.) of dispenser enclosure or that portion of dispenser enclosure containing liquid handling liquid-handling components, extending horizontally in all directions and down to grade level Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure Up to 450 mm (18 in.) above floor level, extending 6 m (20 ft) horizontally in all directions from dispenser enclosure Up to 450 mm (18 in.) above floor level, extending 7.5 m (25 ft) horizontally in all directions from dispenser enclosure Space within dispenser enclosure and all electrical equipment integral with dispensing hose or nozzle Within 450 mm (18 in.) of dispenser enclosure, extending horizontally in all directions and down to grade level Up to 450 mm (18 in.) above grade level, extending 6 m (20 ft) horizontally in all directions from a point vertically below edge of dispenser enclosure Entire space within any pit or box below grade level, any part of which is within 3 m (10 ft) horizontally from any edge of pump Within 900 mm (3 ft) of any edge of pump, extending horizontally in all directions Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions from any edge of pump Indoor 1 1 Entire space within any pit Sales, Storage, Rest Rooms including structures (such as the attendant s kiosk) on or adjacent to Within 1.5 m (5 ft) of any edge of pump, extending in all directions unclassified unclassified Except as noted below Up to 900 mm (3 ft) above floor level, extending 7.5 m (25 ft) horizontally in all directions from any edge of pump

208 07 of 270 4/16/ :12 AM Location Tank, Aboveground Division (Group D) Zone (Group IIA) Inside tank 1 0 Entire inside volume Shell, ends, roof, dike area Extent of Classified Location 1 Entire volume, if there is any opening to room within the extent of a Division 1 or Zone 1 location Entire volume, if there is any opening to room within the extent of a Division 2 or Zone 2 location Entire space within dike, where dike height exceeds distance from tank shell to inside of dike wall for more than 50 percent of tank circumference Entire space within dike, where dike height does not exceed distance from tank shell to inside of dike wall for more than 50 percent of tank circumference Vent 2 2 Within 3 m (10 ft) of shell, ends, or roof of tank Tank, Underground Inside tank 1 0 Entire inside volume Fill Opening Vent 1 1 Vapor Processing System 2 2 Pits 1 1 Equipment in protective enclosures Equipment not within protective enclosure Within 1.5 m (5 ft) of open end of vent, extending in all directions Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Entire space within any pit or box below grade level, any part of which is within a Division 1 or Division 2 classified location or within a Zone 1 or Zone 2 classified location Up to 450 mm (18 in.) above grade level, extending 1.5 m (5 ft) horizontally in all directions from any tight-fill connection and extending 3 m (10 ft) horizontally in all directions from any loose-fill connection Within 1.5 m (5 ft) of open end of vent, extending in all directions Between 1.5 m and 3 m (5 ft and 10 ft) from open end of vent, extending in all directions Entire space within any pit or box below grade level, any part of which: (1) is within a Division 1 or Division 2 classified location; (2) is within a Zone 1 or Zone 2 classified location; (3) houses any equipment used to transfer or process vapors 2 2 Entire space within enclosure Within 450 mm (18 in.) of equipment containing flammable vapors or liquid, extending horizontally in all directions and down to grade level Up to 450 mm (18 in.) above grade level within 3 m (10 ft) horizontally of the vapor processing equipment

209 08 of 270 4/16/ :12 AM Location Division (Group D) Zone (Group IIA) - Equipment enclosure Vacuum assist blower Vault 1 1 Extent of Classified Location 1 Entire space within enclosure, if flammable vapor or liquid is present under normal operating conditions Entire space within enclosure, if flammable vapor or liquid is not present under normal operating conditions Within 450 mm (18 in.) of blower, extending horizontally in all directions and down to grade level Up to 450 mm (18 in.) above grade level, extending 3 m (10 ft) horizontally in all directions Entire interior space, if Class I liquids are stored within 1 For marine application, grade level means the surface of a pier, extending down to water level. 2 Refer to Figure 514.3(a) and Figure 514.3(b) for an illustration of classified location around dispensing devices. 3 Area classification inside the dispenser enclosure is covered in UL 87, Standard for Power-Operated Dispensing Devices for Petroleum Products. 4 Ceiling-mounted hose reel. [30A:Table 8.3.1] Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:44:36 EST 2015 Committee Statement Committee Statement: The extract was updated. Response Message: Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey

210 Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE> 09 of 270 4/16/ :12 AM

211 10 of 270 4/16/ :12 AM First Revision No NFPA [ New Section after 514.3(B)(2) ] (3) Fuel Storage. (a) (b) (c) (d) (e) (f) Aboveground tanks storing CNG or LNG shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [ 30A: ] Informational Note: The relevant distances are given in Section 8.4 of NFPA , Vehicular Gaseous Fuel Systems Code. Aboveground tanks storing hydrogen shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [ 30A: ] Informatonal Note: The relevant distances given in NFPA , Hydrogen Technologies Code. Aboveground tanks storing LP-Gas shall be separated from any adjacent property line that is or can be built upon, any public way, and the nearest important building on the same property. [ 30A: ] Informational Note: The relevant distances are given in Section 6.3 of NFPA , Liquefied Petroleum Gas Code. Aboveground tanks storing CNG, LNG, or LP-Gas shall be separated from each other by at least 6 m (20 ft) and from dispensing devices that dispense liquid or gaseous motor vehicle fuels by at least 6 m (20 ft). [ 30A: ] Exception No. 1: The required separation shall not apply to tanks or dispensers storing or handling fuels of the same chemical composition. Exception No. 2: The required separation shall not apply when both the gaseous fuel storage and dispensing equipment are at least 15 m (50 ft) from any other aboveground motor fuel storage or dispensing equipment. Informational Note: For further information, see NFPA , Vehicular Gaseous Fuel Systems Code, or NFPA , Liquefied Petroleum Gas Code, as applicable. Dispenser Installations Beneath Canopies. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [ 30A: 12.4] Specific Requirements for LP-Gas Dispensing Devices. [ 30A: 12.5] Dispensing devices for LP-Gas shall be located as follows: (1) At least 3 m (10 ft) from any dispensing device for Class I liquids (2) At least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist: a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm 3 (0.1 oz) of liquid upon disconnection. b. The fixed maximum liquid level gauge remains closed during the entire refueling process. [ 30A: ] Table 514.3(B)(2) shall be used to delineate and classify areas for the purpose of installation of electrical wiring and electrical utilization equipment. Submitter Information Verification

212 11 of 270 4/16/ :12 AM Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 16:02:26 EST 2015 Committee Statement Committee Statement: Response Message: A new 514.3(B)(3) contains area classification information for compressed gas fuel storage and is extracted from NFPA 30A. Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

213 12 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (B)(2) ]

214 13 of 270 4/16/ :12 AM (2) Compressed Natural Gas, Liquefied Natural Gas, and Liquefied Petroleum Gas Areas.

215 14 of 270 4/16/ :12 AM Table 514.3(B)(2)shall be used to delineate and classify areas where compressed natural gas (CNG), liquefied natural gas (LNG), or liquefied petroleum gas (LPG) is stored, handled, or dispensed. Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or the enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors, or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. Dispensing devices for liquefied petroleum gas shall be located not less than 1.5 m (5 ft) from any dispensing device for Class I liquids. [ 30A: 12.1, 12.4, 12.5] shall be used to delineate and classify areas where CNG, LNG, compressed or liquefied hydrogen, LP-Gas, or combinations of these, are dispensed as motor vehicle fuels along with Class I or Class II liquids that are also dispensed as motor vehicle fuels. [ 30A: 12.1] Where CNG or LNG dispensers are installed beneath a canopy or enclosure, either the canopy or enclosure shall be designed to prevent accumulation or entrapment of ignitible vapors or all electrical equipment installed beneath the canopy or enclosure shall be suitable for Class I, Division 2 hazardous (classified) locations. [ 30A: 12.4] Dispensing devices for LP-Gas shall be located as follows: (1) At least 3 m (10 ft) from any dispensing device for Class I liquids (2) At least 1.5 m (5 ft) from any dispensing device for Class I liquids where the following conditions exist: a. The LP-Gas deliver nozzle and filler valve release no more than 4 cm 3 (0.1 oz) of liquid upon disconnection. b. The fixed maximum liquid level gauge remains closed during the entire refueling process. [ 30A: ] Informational Note No. 1: For information on area classification where liquefied petroleum gases are dispensed, see Applicable requirements for dispensing devices for LP-Gas is found in NFPA , Liquefied Petroleum Gas Code. Informational Note No. 2: For information on classified areas pertaining to LP-Gas systems other than residential or commercial, see NFPA , Liquefied Petroleum Gas Code, and NFPA , Utility LP-Gas Plant Code. Informational Note No. 3: See 514.3(C) for motor fuel dispensing stations in marinas and boatyards. Table 514.3(B)(2) Electrical Equipment Classified Areas for Dispensing Devices Dispensing Device Compressed natural gas (CNG) Liquefied natural gas (LNG) Liquefied petroleum gas (LP-Gas) Extent of Classified Area Class I, Division 1 Class I, Division 2 Entire space within the dispenser enclosure Entire space within the dispenser enclosure and 1.5 m (5 ft) in all directions from the dispenser enclosure Entire space within the dispenser enclosure; 450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.2 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6.0 m (20 ft) horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilated. 450 mm (18 in.) from the exterior surface of the dispenser enclosure to an elevation of 1.22 m (4 ft) above the base of the dispenser; the entire pit or open space beneath the dispenser and within 6 m (20 ft) horizontally from any edge of the dispenser when the pit or trench is not mechanically ventilated 1.5 m (5 ft) in all directions from dispenser enclosure From 1.5 m to 3.0 m (5 ft to 10 ft) in all directions from the dispenser enclosure 3 m (10 ft) in all directions from the dispenser enclosure Up to 450 mm (18 in.) aboveground and within 6.0 m (20 ft) Up to 450 mm (18 in.) above ground and within 6 m (20 ft) horizontally from any edge of the dispenser enclosure, including pits or trenches within this area when provided with adequate mechanical ventilation

216 15 of 270 4/16/ :12 AM [30A:Table ] Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:57:43 EST 2015 Committee Statement Committee Statement: To align with NFPA 30A-2015, 514.3(B)(2) is replaced in its entirety with a new 514.3(B)(2). The new Table 514.3(B)(2) is extracted from NFPA 30A Table located in TIA Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

217 16 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ] Underground Wiring. Underground wiring shall be installed in threaded rigid metal conduit or threaded steel intermediate metal conduit. Any portion of electrical wiring that is below the surface of a Class I, Division 1, or a Class I, Division 2, location [as classified in Table 514.3(B)(1) and Table 514.3(B)(2)] shall be sealed within 3.05 m (10 ft) of the point of emergence above grade. Except for listed explosionproof reducers at the conduit seal, there shall be no union, coupling, box, or fitting between the conduit seal and the point of emergence above grade. Refer to Table Exception No. 1: Type MI cable shall be permitted where it is installed in accordance with Article 332. Exception No. 2: Type PVC conduit and, Type RTRC conduit, and Type HDPE conduit shall be permitted where buried under not less than 600 mm (2 ft) of cover. Where Type PVC conduit or, Type RTRC conduit, or Type HDPE conduit is used, threaded rigid metal conduit or threaded steel intermediate metal conduit shall be used for the last 600 mm (2 ft) of the underground run to emergence or to the point of connection to the aboveground raceway, and an equipment grounding conductor shall be included to provide electrical continuity of the raceway system and for grounding of non currentcarrying metal parts. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 14:59:01 EST 2015 Committee Statement Committee Statement: Type HDPE provides at least the same level of protection as Type PVC or Type RTRC when buried 24 inches in the earth. This is also permitted in Buried in earth at 24 inches is not in a classified location. Response Message: Public Input No NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey

218 Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE> 17 of 270 4/16/ :12 AM

219 18 of 270 4/16/ :12 AM First Revision No NFPA [ Section No (A) ] (A) At Dispenser. A listed seal shall be provided in each conduit run entering or leaving a dispenser or any cavities or enclosures in direct communication therewith. The sealing fitting or listed explosionproof reducer at the seal shall be the first fitting after the conduit emerges from the earth or concrete. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:12:05 EST 2015 Committee Statement Committee Statement: Listed explosionproof reducers were added to align with other sections. Response Message: Public Input No NFPA [Section No (A)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy

220 19 of 270 4/16/ :12 AM Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

221 First Revision No NFPA [ Section No ] Circuit Disconnects. (A) General Emergency Electrical Disconnects. Each circuit leading to or through dispensing equipment, including all associated power, communications, data, and video circuits, and equipment for remote pumping systems, shall be provided with a clearly identified and readily accessible switch or other approved means, located remote from the dispensing devices, to disconnect simultaneously from the source of supply, all conductors of the circuits, including the grounded conductor, if any. Fuel dispensing systems shall be provided with one or more clearly identified emergency shutoff devices or electrical disconnects. Such devices or disconnects shall be installed in approved locations but not less than 6 m (20 ft) or more than 30 m (100 ft) from the fuel dispensing devices that they serve. Emergency shutoff devices or electrical disconnects shall disconnect power to all dispensing devices; to all remote pumps serving the dispensing devices; to all associated power, control, and signal circuits; and to all other electrical equipment in the hazardous (classified) locations surrounding the fuel dispensing devices. When more than one emergency shutoff device or electrical disconnect is provided, all devices shall be interconnected. Resetting from an emergency shutoff condition shall require manual intervention and the manner of resetting shall be approved by the authority having jurisdiction. [ 30A: 6.7] Single-pole breakers utilizing handle ties shall not be permitted. Exception: Intrinsically safe electrical equipment need not meet this requirement. [ 30A: 6.7] (B) Attended Self-Service Motor Fuel Dispensing Facilities. Emergency controls as specified in (A) shall be installed at a location acceptable to the authority having jurisdiction, but controls shall not be more than 30 m (100 ft) from dispensers. At attended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to the attendant. [30A:6.7.1] (C) Unattended Self-Service Motor Fuel Dispensing Facilities. Emergency controls as specified in (A) shall be installed at a location acceptable to the authority having jurisdiction, but the control shall be more than 6 m (20 ft) but less than 30 m (100 ft) from the dispensers. Additional emergency controls shall be installed on each group of dispensers or the outdoor equipment used to control the dispensers. Emergency controls shall shut off all power to all dispensing equipment at the station. Controls shall be manually reset only in a manner approved by the authority having jurisdiction. At unattended motor fuel dispensing facilities, the devices or disconnects shall be readily accessible to patrons and at least one additional device or disconnect shall be readily accessible to each group of dispensing devices on an individual island. [30A:6.7.2] Informational Note: For additional information, see and of NFPA 30A -2012, Code for Motor Fuel Dispensing Facilities and Repair Garages. Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Fri Jan 16 15:15:08 EST 2015 Committee Statement Committee Statement: Section is revised to reflect the requirements in NFPA 30A Response Message: Public Input No NFPA [Section No (B)] 20 of 270 4/16/ :12 AM

222 21 of 270 4/16/ :12 AM Public Input No NFPA [Section No (C)] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

223 22 of 270 4/16/ :12 AM First Revision No NFPA [ Section No ]

224 23 of 270 4/16/ :12 AM Class I Locations.

225 24 of 270 4/16/ :12 AM Table shall be applied where Class I liquids are stored, handled, or dispensed and shall be used to delineate and classify bulk storage plants. The class location shall not extend beyond a floor, wall, roof, or other solid partition that has no communicating openings. [30:8.1, , 7.4 ] Informational Note No. 1: The area classifications listed in Table are based on the premise that the installation meets the applicable requirements of NFPA , Flammable and Combustible Liquids Code, Chapter 5, in all respects. Should this not be the case, the authority having jurisdiction has the authority to classify the extent of the classified space. Informational Note No. 2: See (C) through (E) for gasoline dispensing stations in marinas and boatyards. Table Electrical Area Classifications Location Indoor equipment installed in accordance with Section of NFPA 30 where flammable vapor air mixtures can exist under normal operation Outdoor equipment of the type covered in Section of NFPA 30 where flammable vapor air mixtures may can exist under normal operation NEC Class I Division Zone Extent of Classified Area The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time Area within 1.5 m (5 ft) of any edge of such equipment, extending in all directions Area between 1.5 m and 2.5 m (5 ft and 8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 1.5 m to 7.5 m (5 ft to 25 ft) horizontally from any edge of such equipment 1 The entire area associated with such equipment where flammable gases or vapors are present continuously or for long periods of time 1 1 Area within 900 mm (3 ft) of any edge of such equipment, extending in all directions 2 2 Area between 900 mm (3 ft) and 2.5 m (8 ft) of any edge of such equipment, extending in all directions; also, space up to 900 mm (3 ft) above floor or grade level within 900 mm to 3.0 m (3 ft to 10 ft) horizontally from any edge of such equipment Tank storage installations inside buildings 1 1 All equipment located below grade level 2 2 Any equipment located at or above grade level Tank aboveground, fixed roof 1 0 Inside fixed roof tank 1 1 Area inside dike where dike height is greater than the distance from the tank to the dike for more than 50 percent of the tank circumference Shell, ends, or roof and dike area 2 2 Within 3.0 m (10 ft) from shell, ends, or roof of tank; also, area inside dike to level of top of dike wall Vent 1 0 Area inside of vent piping or opening 1 1 Within 1.5 m (5 ft) of open end of vent, extending in all directions 2 2 Area between 1.5 m and 3.0 m (5 ft and 10 ft) from open end of vent, extending in all directions

226 25 of 270 4/16/ :12 AM Location Tank aboveground, floating roof Floating roof with With fixed outer roof Floating roof with With no fixed outer roof NEC Class I Division Zone 1 0 Tank vault interior 1 1 Underground tank fill opening 1 1 Extent of Classified Area Area between the floating and fixed roof sections and within the shell 1 1 Area above the floating roof and within the shell 2 2 Entire interior volume, if Class I liquids are stored within Any pit, box, or space below grade level, if any part is within a Division 1 or 2, or Zone 1 or 2, classified location Up to 450 mm (18 in.) above grade level within a horizontal radius of 3.0 m (10 ft) from a loose fill connection, and within a horizontal radius of 1.5 m (5 ft) from a tight fill connection Vent discharging upward 1 0 Area inside of vent piping or opening Drum and container filling outdoors or indoors Pumps, bleeders, withdrawal fittings Within 900 mm (3 ft) of open end of vent, extending in all directions Area between 900 mm and 1.5 m (3 ft and 5 ft) of open end of vent, extending in all directions 1 0 Area inside the drum or container Indoors Indoor 2 2 Outdoors Outdoor 2 2 Pits and sumps Without mechanical ventilation 1 1 With adequate mechanical ventilation Containing valves, fittings, or piping, and not within a Division 1 or 2, or Zone 1 or 2, classified location 2 2 Within 900 mm (3 ft) of vent and fill openings, extending in all directions Area between 900 mm and 1.5 m (3 ft and 5 ft) from vent or fill opening, extending in all directions; also, up to 450 mm (18 in.) above floor or grade level within a horizontal radius of 3.0 m (10 ft) from vent or fill opening Within 1.5 m (5 ft) of any edge of such devices, extending in all directions; also, up to 900 mm (3 ft) above floor or grade level within 7.5 m (25 ft) horizontally from any edge of such devices Within 900 mm (3 ft) of any edge of such devices, extending in all directions. Also, up to 450 mm (18 in.) above grade level within 3.0 m (10 ft) horizontally from any edge of such devices Entire area within a pit or sump if any part is within a Division 1 or 2, or Zone 1 or 2, classified location Entire area within a pit or sump if any part is within a Division 1 or 2, or Zone 1 or 2, classified location 2 2 Entire pit or sump

227 26 of 270 4/16/ :12 AM Location Drainage ditches, separators, impounding basins NEC Class I Division Zone Outdoors Outdoor 2 2 Indoors Indoor Tank vehicle and tank car 2 Tank vehicle and tank car 2 loading Loading through open dome Loading through bottom connections with atmospheric venting Office and rest rooms Loading through closed dome with atmospheric venting Loading through closed dome with vapor control Bottom loading with vapor control or any bottom unloading Storage and repair garage for tank vehicles Garages for other than tank vehicles Outdoor drum storage Extent of Classified Area Area up to 450 mm (18 in.) above ditch, separator, or basin; also, area up to 450 mm (18 in.) above grade within 4.5 m (15 ft) horizontally from any edge Same classified area as pits and sumps 1 0 Area inside of the tank Within 900 mm (3 ft) of edge of dome, extending in all directions Area between 900 mm and 4.5 m (3 ft and 15 ft) from edge of dome, extending in all directions 1 0 Area inside of the tank Unclassified Within 900 mm (3 ft) of point of venting to atmosphere, extending in all directions Area between 900 mm and 4.5 m (3 ft and 15 ft) from point of venting to atmosphere, extending in all directions; also, up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of loading connection If there is any opening to these rooms within the extent of an indoor classified location, the room shall be classified the same as if the wall, curb, or partition did not exist. Within 900 mm (3 ft) of open end of vent, extending in all directions Area between 900 mm and 4.5 m (3 ft and 15 ft) from open end of vent, extending in all directions; also, within 900 mm (3 ft) of edge of dome, extending in all directions Within 900 mm (3 ft) of point of connection of both fill and vapor lines extending in all directions Within 900 mm (3 ft) of point of connections, extending in all directions; also up to 450 mm (18 in.) above grade within a horizontal radius of 3.0 m (10 ft) from point of connections 1 1 All pits or spaces below floor level 2 2 Unclassified Ordinary Unclassified Ordinary Area up to 450 mm (18 in.) above floor or grade level for entire storage or repair garage If there is any opening to these rooms within the extent of an outdoor classified location, the entire room shall be classified the same as the area classification at the point of the opening.

228 27 of 270 4/16/ :12 AM Location Inside rooms or storage lockers used for the storage of Class I liquids Indoor warehousing where there is no flammable liquid transfer Office and rest rooms NEC Class I Division Zone 2 2 Entire room or locker Unclassified Ordinary Ordinary Piers and wharves See Figure Extent of Classified Area If there is any opening to these rooms within the extent of an indoor classified location, the room shall be classified classified location shall extend through the opening to the same extent as if the wall, curb, or partition did not exist. If there is any opening to these rooms within the extent of an indoor classified location, the room shall be classified the same as if the wall, curb, or partition did not exist. 1 The release of Class I liquids may can generate vapors to the extent that the entire building, and possibly an area surrounding it, should be considered a Class I, Division 2 or Zone 2 location. 2 When classifying extent of area, consideration shall be given to the fact that tank cars or tank vehicles may can be spotted at varying points. Therefore, the extremities of the loading or unloading positions shall be used. [30: Table ] Figure Area Classification for a Marine Terminal Handling Flammable Liquids. [30:Figure ] Supplemental Information File Name 515.3_3953_BC.docx Description Submitter Information Verification Submitter Full Name: CMP 14 Organization: [ Not Specified ] Street Address: City: State: Zip: Submittal Date: Tue Jan 13 16:47:55 EST 2015 Committee Statement Committee Statement: The reference in Informational Note No. 2 was changed to provide a more direct reference. Section referred the user back to 514.3(C) through (E).

229 28 of 270 4/16/ :12 AM The extracts were updated. (First para. 30:7.3, 7.4; Table replaced with 30:Table 7.3.3) Response Message: Public Input No NFPA [Section No ] Ballot Results This item has passed ballot 16 Eligible Voters 1 Not Returned 14 Affirmative All 1 Affirmative with Comments 0 Negative with Comments 0 Abstention Not Returned Cahill, Corey Affirmative All Alexander, Harold G. Ankele, Donald W. Bernsen, Marc J. Blais, Steven J. Burns, Dave Jones, Robert A. Kines, Haywood Lawrence, Jr., William G. Massey, L. Evans McBride, William E. Neagle, Jeremy Parks, Ryan Simmons, John L. Wechsler, David B. Affirmative with Comment Wirfs, Mark C. NONE>

230 29 of 270 4/16/ :12 AM First Revision No NFPA [ Article 516 ] Article 516 Spray Application, Dipping, Coating, and Printing Processes Using Flammable or Combustible Materials Informational Note: Text that is followed by a reference in brackets has been extracted from NFPA , Standard for Spray Application Using Flammable and Combustible Materials, or NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids. Only editorial changes were made to the extracted text to make it consistent with this Code. Part I. General Scope. This article covers the regular or frequent application of flammable liquids, combustible liquids, and combustible powders by spray operations and the application of flammable liquids, or combustible liquids at temperatures above their flashpoint, by spraying, by dipping, coating, printing, or other means. Informational Note: For further information regarding safeguards for these processes, such as fire protection, posting of warning signs, and maintenance, see NFPA , Standard for Spray Application Using Flammable and Combustible Materials, and NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids. For additional information regarding ventilation, see NFPA , Standard for Exhaust Systems for Air Conveying of Vapors, Gases, Mists, and Noncombustible Particulate Solids Definitions. For the purpose of this article, the following definitions shall apply. Flash-Off Area. An open or enclosed area after a spray application process where vapors are released due to exposure to ambient air or a heated atmosphere. [ 33: ] Limited Finishing Workstation. An apparatus that is capable of confining the vapors, mists, residues, dusts, or deposits that are generated by a spray application process and that meets the requirements of Section 14.3 of NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, but does not meet the requirements of a spray booth or spray room, as herein defined. [ 33: ] An apparatus that is capable of confining the vapors, mists, residues, dusts, or deposits that are generated by a spray application process and that meets the requirements of Section 14.3 of NFPA 33, Standard for Spray Application Using Flammable or Combustible Materials, but does not meet the requirements of a spray booth or spray room, as herein defined. [ 33: ] Outdoor Spray Area. A spray area that is outside the confines of a building or that has a canopy or roof that does not limit the dissipation of the heat of a fire or dispersion of flammable vapors and does not restrict fire-fighting access and control. For the purpose of this standard, an outdoor spray area can be treated as an unenclosed spray area. [ 33: ] Resin Application Area. Any area in which polyester resins or gelcoats are spray applied. [ 33: ]

231 Spray Area. Any fully enclosed, partly enclosed, or unenclosed area in which ignitible quantities of flammable or combustible vapors, mists, residues, dusts, or deposits are present due to the operation of spray processes, including (1) any area in the direct path of a spray application process; (2) the interior of a spray booth or spray room or limited finishing workstation, as herein defined; (3) the interior of any exhaust plenum, eliminator section, or scrubber section; (4) the interior of any exhaust duct or exhaust stack leading from a spray application process; (5) the interior of any air recirculation filter house or enclosure, including secondary recirculation particulate filters; (6) any solvent concentrator (pollution abatement) unit or solvent recovery (distillation) unit. The following are not considered to be a part of the spray area: (1) fresh air make-up units; (2) air supply ducts and air supply plenums; (3) recirculation air supply ducts downstream of secondary filters; (4) exhaust ducts from solvent concentrator (pollution abatement) units. [ 33: ] Informational Note: Unenclosed spray areas are locations outside of buildings or are localized operations within a larger room or space. Such are normally provided with some local vapor extraction/ventilation system. In automated operations, the area limits are the maximum area in the direct path of spray operations. In manual operations, the area limits are the maximum area of spray when aimed at 90 degrees to the application surface. Any fully enclosed, partly enclosed, or unenclosed area in which dangerous quantities of flammable or combustible vapors, mists, residues, dusts, or deposits are present due to the operation of spray processes, including (1) any area in the direct path of a spray application process; (2) the interior of a spray booth, spray room, or limited finishing workstation, as herein defined; (3) the interior of any exhaust plenum, eliminator section, or scrubber section; (4) the interior of any exhaust duct or exhaust stack leading from a spray application process; (5) the interior of any air recirculation path up to and including recirculation particulate filters; (6) any solvent concentrator (pollution abatement) unit or solvent recovery (distillation) unit; and (7) the inside of a membrane enclosure. The following are not part of the spray area: (1) fresh air make-up units; (2) air supply ducts and air supply plenums; (3) recirculation air supply ducts downstream of recirculation particulate filters; and (4) exhaust ducts from solvent concentrator (pollution abatement) units. [ 33: ] Informational Note: Unenclosed spray areas are locations outside of buildings or are localized operations within a larger room or space. Such are normally provided with some local vapor extraction/ventilation system. In automated operations, the area limits are the maximum area in the direct path of spray operations. In manual operations, the area limits are the maximum area of spray when aimed at 90 degrees to the application surface. Spray Booth. A power-ventilated enclosure for a spray application operation or process that confines and limits the escape of the material being sprayed, including vapors, mists, dusts, and residues that are produced by the spraying operation and conducts or directs these materials to an exhaust system. [ 33: ] Informational Note: A spray booth is an enclosure or insert within a larger room used for spray/coating/dipping applications. A spray booth may be fully enclosed or have open front or face and may include a separate conveyor entrance and exit. The spray booth is provided with a dedicated ventilation exhaust but may draw supply air from the larger room or have a dedicated air supply. A power-ventilated enclosure for a spray application operation or process that confines and limits the escape of the material being sprayed, including vapors, mists, dusts, and residues that are produced by the spraying operation and conducts or directs these materials to an exhaust system. [ 33: ] Informational Note: A spray booth is an enclosure or insert within a larger room used for spray/coating/dipping applications. A spray booth can be fully enclosed or have open front or face and can include separate conveyor entrance and exit. The spray booth is provided with a dedicated ventilation exhaust with supply air from the larger room or from a dedicated air supply. Spray Room. A power-ventilated fully enclosed room used exclusively for open spraying of flammable or combustible materials. A spray room is a purposefully enclosed room built for spray/coating/dipping applications provided with dedicated ventilation supply and exhaust. Normally the room is configured to house the item to be painted, providing reasonable access around the item/process. Depending on the size of the item being painted, such rooms may actually be the entire building or the major portion thereof. [ 33: ] A power-ventilated fully enclosed room used exclusively for open spraying of flammable or combustible materials. [ 33: ] 30 of 270 4/16/ :12 AM

232 Unenclosed Spray Area. Any spray area that is not confined by a limited finishing workstation, spray booth, or spray room, as herein defined. [ 33: ] Any spray area that is not confined by a limited finishing workstation, spray booth, or spray room, as herein defined. [ 33: ] Classification of Locations. Classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitible or explosive mixtures with air. (A) Zone Classification of Locations. (0) For the purposes of this article, the zone system of electrical area classification shall be applied as follows: 0. The inside of open or closed containers or vessels shall be considered a Class I, Zone 0 location. 0. A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1 location. 0. A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2 location. 0. A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location. 0. A Class II, Division 2 location shall be permitted to be alternatively classified as a Zone 22 location. [ 33: 6.2.2] (0) For the purposes of electrical area classification, the division system and the zone system shall not be intermixed for any given source of release. [ 33: 6.2.3] (0) In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Class I, Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [ 33: 6.2.4] (0) Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceed the autoignition temperature of the material being sprayed shall not be located in a spray area or in any surrounding area that is classified as Division 2, Zone 2, or Zone 22. Exception: This requirement shall not apply to drying, curing, or fusing apparatus. [ 33: 6.2.5] (0) Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and that is located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal. [ 33: 6.2.6] (B) Class I, Division 1 or Class I, Zone 0 Locations. The following spaces shall be considered Class I, Division 1, or Class I, Zone 0, as applicable: (0) The interior of any open or closed container or vessel of a flammable liquid (0) The interior of any dip tank or coating tank (0) The interior of any ink fountain, ink reservoir, or ink tank Informational Note: For additional guidance, see Chapter 6 of NFPA , Standard for Spray Application Using Flammable or Combustible Materials, and Chapter 6 of NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids. 31 of 270 4/16/ :12 AM

233 32 of 270 4/16/ :12 AM (C) Class I, Division 1; Class I, Zone 1; Class II, Division 1; or Zone 21 Locations. The following spaces shall be considered Class I, Division 1, or Class I, Zone 1, Class II, Division 1, or Zone 21 locations, as applicable: (0) The interior of spray booths and rooms except as specifically provided in 516.3(D)(7). (0) The interior of exhaust ducts. (0) Any area in the direct path of spray operations. (0) For open dipping and coating operations, all spaces within a 1.5-m (5-ft) radial distance from the vapor sources extending from these surfaces to the floor. The vapor source shall be the liquid exposed in the process and the drainboard, and any dipped or coated object from which it is possible to measure vapor concentrations exceeding 25 percent of the lower flammable limit at a distance of 300 mm (1 ft), in any direction, from the object as in Figure 516.3(D)(1). (0) Sumps, pits, or belowgrade channels within 7.5 m (25 ft) horizontally of a vapor source. If the sump, pit, or channel extends beyond 7.5 m (25 ft) from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 for its entire length. (0) All space in all directions outside of but within 900 mm (3 ft) of open containers, supply containers, spray gun cleaners, and solvent distillation units containing flammable liquids. (0) For limited finishing workstations, the area inside the curtains or partitions. See Figure 516.3(D)(5). (D) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations. The following spaces shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22, as applicable.

234 33 of 270 4/16/ :12 AM (1) Unenclosed Spray Processes. For unenclosed spraying, all space outside of but within 6 m (20 ft) horizontally and 3 m (10 ft) vertically of the Class I, Division 1 or Class I, Zone 1 location as defined in 516.3(A) and not separated from it by partitions. See Figure 516.3(D)(1). [ 33: 6.5.1] Figure 516.3(D)(1) Electrical Area Classification for Unenclosed Spray Areas. [33:Figure 6.5.1]

235 (2) Closed-Top, Open-Face, and Open-Front Spray Booths and Spray Rooms. If spray application operations are conducted within a closed-top, open-face, or open-front booth or room, as shown in Figure 516.3(D)(2), any electrical wiring or utilization equipment located outside of the booth or room but within 915 mm (3 ft) of any opening shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. The Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations shown in Figure 516.3(D)(2) shall extend from the edges of the open face or open front of the booth or room in accordance with the following: Informational Note: For both interlocked and non-interlocked exhaust ventilation systems, the Division 2, Zone 2 or Zone 22 location extends 915 mm (3 ft) horizontally and 915 mm (3 ft) vertically from the open face or open front of the booth or room, as shown in Figure 516.3(D)(2). Figure 516.3(D)(2) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. (3) Open-Top Spray Booths. For spraying operations conducted within an open top spray booth, the space 915 mm (3 ft) vertically above the booth and within 915 mm (3 ft) of other booth openings shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22. [ 33: 6.5.3] 34 of 270 4/16/ :12 AM

236 35 of 270 4/16/ :12 AM (4) Enclosed Spray Booths and Spray Rooms. For spraying operations confined to an enclosed spray booth or room, electrical area classification shall be as follows: [ 33: 6.5.4] (0) The area within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, as shown in Figure 516.3(D)(4)(1). (0) Where exhaust air is recirculated, both of the following shall apply: 0. The interior of any recirculation path from the secondary particulate filters up to and including the air supply plenum shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. 0. The interior of fresh air supply ducts shall be unclassified. (0) Where exhaust air is not recirculated, the interior of fresh air supply ducts and fresh air supply plenums shall be unclassified. Figure 516.3(D)(4)(1) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4]

237 36 of 270 4/16/ :12 AM (5) Limited Finishing Workstations. For limited finishing workstations, the area inside the 915-mm (3-ft) space horizontally and vertically beyond the volume enclosed by the outside surface of the curtains or partitions shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22, as shown in Figure 516.3(D)(5). Figure 516.3(D)(5) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Limited Finishing Workstation. [33:Figure ]

238 37 of 270 4/16/ :12 AM (6) Areas Adjacent to Open Dipping and Coating Processes.

239 Electrical wiring and electrical utilization equipment located adjacent to open processes shall meet the requirements of 516.3(D)(6)(1) through (4) and Figure 516.3(D)(6)(a), Figure 516.3(D)(6)(b), Figure 516.3(D)(6)(c), Figure 516.3(D)(6)(d), or Figure 516.3(D)(6)(e), whichever is applicable. [ 34: 6.4] (0) Electrical wiring and electrical utilization equipment located in any sump, pit, or below grade channel that is within 7620 mm (25 ft) horizontally of a vapor source, as defined by this standard, shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. If the sump, pit, or channel extends beyond 7620 mm (25 ft) of the vapor source, it shall be provided with a vapor stop, or it shall be classified as Class I, Division 1 or Class I, Zone 1 for its entire length. [ 34: 6.4.1] (0) Electrical wiring and electrical utilization equipment located within 1525 mm (5 ft) of a vapor source shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The space inside a dip tank, ink fountain, ink reservoir, or ink tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable. [ 34: 6.4.2] (0) Electrical wiring and electrical utilization equipment located within 915 mm (3 ft) of the Class I, Division 1 or Class I, Zone 1 location described in 516.3(D)(6)(2) shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable. [ 34: 6.4.3] (0) The space 915 mm (3 ft) above the floor and extending 6100 mm (20 ft) horizontally in all directions from the Class I, Division 1 or Class I, Zone 1 location described in 516.3(D)(6)(2) shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable. [ 34: 6.4.4] Exception: This space shall be permitted to be unclassified for purposes of electrical installations if the surface area of the vapor source does not exceed 0.5 m 2 (5 ft 2 ), the contents of the dip tank, ink fountain, ink reservoir, or ink tank do not exceed 19 L (5 gal), and the vapor concentration during operating and shutdown periods does not exceed 25 percent of the lower flammable limit. Figure 516.3(D)(6)(a) Electrical Area Classification for Open Dipping and Coating Processes Without Vapor Containment or Ventilation. [34:Figure 6.4(a)] Figure 516.3(D)(6)(b) Electrical Area Classification for Open Dipping and Coating Processes with Peripheral Vapor Containment and Ventilation Vapors Confined to Process Equipment. [34:Figure 6.4(b)] 38 of 270 4/16/ :12 AM

240 39 of 270 4/16/ :12 AM Figure 516.3(D)(6)(c) Electrical Area Classification for Open Dipping and Coating Processes with Partial Peripheral Vapor Containment and Ventilation Vapors NOT Confined to Process Equipment. [34:Figure 6.4(c)] Figure 516.3(D)(6)(d) Electrical Area Classification for Open Dipping and Coating Processes with Partial Peripheral Vapor Containment and Ventilation Vapors Confined to Process Equipment. [34:Figure 6.4(d)]

241 40 of 270 4/16/ :12 AM Figure 516.3(D)(6)(e) Electrical Area Classification for a Typical Printing Process. [34:Figure 6.4(e)]

242 41 of 270 4/16/ :12 AM (7) Enclosed Coating and Dipping Operations. Areas adjacent to enclosed dipping and coating processes shall be classified in accordance with 516.3(D)(7) and Figure 516.3(D)(7). The space adjacent to an enclosed dipping or coating process or apparatus shall be considered unclassified. [ 34: 6.5.3] Exception: The space within 915 mm (3 ft) in all directions from any opening in the enclosures shall be classified as Class I, Division 2 or Class I, Zone 2, as applicable. [34:6.5.2] The interior of any enclosed dipping or coating process or apparatus shall be a Class I, Division 1 or Class I, Zone 1 location, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 1 or Class I, Zone 1 locations, whichever is applicable. The area inside the dip tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable. [ 34: 6.5.1] Figure 516.3(D)(7) Electrical Area Classification Around an Enclosed Dipping or Coating Process. [34:Figure 6.5] (8) Open Containers. All space in all directions within 600 mm (2 ft) of the Division 1 or Zone 1 area surrounding open containers, supply containers, spray gun cleaners, and solvent distillation units containing flammable liquids, as well as the area extending 1.5 m (5 ft) beyond the Division 1 or Zone 1 area up to a height of 460 mm (18 in.) above the floor or grade level. [ 33: 6.5.5] (E) Adjacent Locations. Adjacent locations that are cut off from the defined Class I or Class II locations by tight partitions without communicating openings, and within which flammable vapors or combustible powders are not likely to be released, shall be unclassified. (F) Unclassified Locations. Locations using drying, curing, or fusion apparatus and provided with positive mechanical ventilation adequate to prevent accumulation of flammable concentrations of vapors, and provided with effective interlocks to de-energize all electrical equipment (other than equipment identified for Class I locations) in case the ventilating equipment is inoperative, shall be permitted to be unclassified where the authority having jurisdiction so judges. Informational Note: For further information regarding safeguards, see NFPA , Standard for Ovens and Furnaces Wiring and Equipment in Class I Locations. (A) Wiring and Equipment Vapors. All electrical wiring and equipment within the Class I location (containing vapor only not residues) defined in shall comply with the applicable provisions of Article 501 or Article 505, as applicable. (B) Wiring and Equipment Vapors and Residues. Unless specifically listed for locations containing deposits of dangerous quantities of flammable or combustible vapors, mists, residues, dusts, or deposits (as applicable), there shall be no electrical equipment in any spray area as herein defined whereon deposits of combustible residue may readily accumulate. All electrical wiring shall be comply with 516.4(A).

243 42 of 270 4/16/ :12 AM (C) Illumination.

244 43 of 270 4/16/ :12 AM (0) Luminaires, like that shown in Figure 516.4(C)(1), that are attached to the walls or ceiling of a spray area but that are outside any classified area and are separated from the spray area by glass panels shall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the spray area. [ 33: 6.6.1] (0) Luminaires, like that shown in Figure 516.4(C)(1), that are attached to the walls or ceiling of a spray area; that are separated from the spray area by glass panels and that are located within a Class I, Division 2; a Class I, Zone 2; a Class II, Division 2; or a Zone 22 location shall be suitable for such location. Such fixtures shall be serviced from outside the spray area. [ 33: 6.6.2] (0) Luminaires, like that shown in Figure 516.4(C)(3), that are an integral part of the walls or ceiling of a spray area shall be permitted to be separated from the spray area by glass panels that are an integral part of the fixture. Such fixtures shall be listed for use in Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, and also shall be listed for accumulations of deposits of combustible residues. Such fixtures shall be permitted to be serviced from inside the spray area. [ 33: 6.6.3] (0) Glass panels used to separate luminaires from the spray area or that are an integral part of the luminaire shall meet the following requirements. 0. Panels for light fixtures or for observation shall be of heat-treated glass, laminated glass, wired glass, or hammered-wired glass and shall be sealed to confine vapors, mists, residues, dusts, and deposits to the spray area. [ 33: 5.5.1] Exception: Listed spray booth assemblies that have vision panels constructed of other materials shall be permitted. 0. Panels for light fixtures shall be separated from the fixture to prevent the surface temperature of the panel from exceeding 93 C (200 F). [ 33: 5.5.2] 0. The panel frame and method of attachment shall be designed to not fail under fire exposure before the vision panel fails. [ 33: 5.5.3] Figure 516.4(C)(1) Example of a Luminaire that is Mounted Outside of the Spray Area and is Serviced from Outside the Spray Area. [33:Figure 6.6.1] Figure 516.4(C)(3) Example of a Luminaire that is an Integral Part of the Spray Area and is Serviced from Inside the Spray Area. [33:Figure 6.6.3]

245 44 of 270 4/16/ :12 AM (D) Portable Equipment. Portable electric luminaires or other utilization equipment shall not be used in a spray area during spray operations. Exception No. 1: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type identified for Class I, Division 1 or Class 1, Zone 1 locations where readily ignitible residues may be present. [ 33: 6.9 Exception] Exception No. 2: Where portable electric drying apparatus is used in spray booths and the following requirements are met: (0) The apparatus and its electrical connections are not located within the spray enclosure during spray operations. (0) Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I, Zone 2 locations. (0) All metallic parts of the drying apparatus are electrically bonded and grounded. (0) Interlocks are provided to prevent the operation of spray equipment while drying apparatus is within the spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the drying apparatus and to shut off drying apparatus on failure of ventilation system. (E) Electrostatic Equipment. Electrostatic spraying or detearing equipment shall be installed and used only as provided in Informational Note: For further information, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials. (F) Static Electric Discharges. (0) All persons and all electrically conductive objects, including any metal parts of the process equipment or apparatus, containers of material, exhaust ducts, and piping systems that convey flammable or combustible liquids, shall be electrically grounded. [ 34: 6.8.1] (0) Provision shall be made to dissipate static electric charges from all nonconductive substrates in printing processes Wiring and Equipment Not Within Classified Locations.

246 45 of 270 4/16/ :12 AM (A) Wiring. All fixed wiring above the Class I and II locations shall be in metal raceways, Type PVC conduit, Type RTRC conduit, or electrical nonmetallic tubing; where cables are used, they shall be Type MI, Type TC, or Type MC cable. Cellular metal floor raceways shall only be permitted to supply ceiling outlets or as extensions to the area below the floor of a Class I or II location. Where cellular metal raceways are used, they shall not have connections leading into or passing through the Class I or II location unless suitable seals are provided. (B) Equipment. Equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed so as to prevent the escape of sparks or hot metal particles Special Equipment. (A) Fixed Electrostatic Equipment. This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, and/or precipitation of hazardous materials for coatings on articles or for other similar purposes in which the charging or atomizing device is attached to a mechanical support or manipulator. This shall include robotic devices. This section shall not apply to devices that are held or manipulated by hand. Where robot or programming procedures involve manual manipulation of the robot arm while spraying with the high voltage on, the provisions of (B) shall apply. The installation of electrostatic spraying equipment shall comply with (A)(1) through (A)(10). Spray equipment shall be listed except as otherwise permitted. All automatic electrostatic equipment systems shall comply with 516.4(A) (1) through (A)(9). [ 33: 11.5] Informational Note: For more information on listing and approval of electrostatic spray equipment, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials, Section NFPA 33 permits certain electrostatic spray equipment to be approved for use when additional mitigation equipment is employed. (1) Power and Control Equipment. Transformers, high-voltage supplies, control apparatus, and all other electrical portions of the equipment shall be installed outside of the Class I location as defined in or be of a type identified for the location. Exception: High-voltage grids, electrodes, electrostatic atomizing heads, and their connections shall be permitted within the Class I location. (2) Electrostatic Equipment. Electrodes and electrostatic atomizing heads shall be adequately supported in permanent locations and shall be effectively insulated from ground. Electrodes and electrostatic atomizing heads that are permanently attached to their bases, supports, reciprocators, or robots shall be deemed to comply with this section. (3) High-Voltage Leads. High-voltage leads shall be properly insulated and protected from mechanical damage or exposure to destructive chemicals. Any exposed element at high voltage shall be effectively and permanently supported on suitable insulators and shall be effectively guarded against accidental contact or grounding. (4) Support of Goods. Goods being coated using this process shall be supported on conveyors or hangers. The conveyors or hangers shall be arranged (1) to ensure that the parts being coated are electrically connected to ground with a resistance of 1 megohm or less and (2) to prevent parts from swinging.

247 (5) Automatic Controls. Electrostatic apparatus shall be equipped with automatic means that will rapidly de-energize the high-voltage elements under any of the following conditions: (0) Stoppage of ventilating fans or failure of ventilating equipment from any cause (0) Stoppage of the conveyor carrying goods through the high-voltage field unless stoppage is required by the spray process (0) Occurrence of excessive current leakage at any point in the high-voltage system (0) De-energizing the primary voltage input to the power supply (6) Grounding. All electrically conductive objects in the spray area, except those objects required by the process to be at high voltage, shall be adequately grounded. This requirement shall apply to paint containers, wash cans, guards, hose connectors, brackets, and any other electrically conductive objects or devices in the area. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. (7) Isolation. Safeguards such as adequate booths, fencing, railings, interlocks, or other means shall be placed about the equipment or incorporated therein so that they, either by their location, character, or both, ensure that a safe separation of the process is maintained. (8) Signs. Signs shall be conspicuously posted to convey the following: (0) Designate the process zone as dangerous with regard to fire and accident (0) Identify the grounding requirements for all electrically conductive objects in the spray area (0) Restrict access to qualified personnel only (9) Insulators. All insulators shall be kept clean and dry. (10) Other Than Nonincendive Equipment. Spray equipment that cannot be classified as nonincendive shall comply with (A)(10)(a) and (A)(10)(b). (0) Conveyors, hangers, and application equipment shall be arranged so that a minimum separation of at least twice the sparking distance is maintained between the workpiece or material being sprayed and electrodes, electrostatic atomizing heads, or charged conductors. Warnings defining this safe distance shall be posted. [ 33: ] (0) The equipment shall provide an automatic means of rapidly de-energizing the high-voltage elements in the event the distance between the goods being painted and the electrodes or electrostatic atomizing heads falls below that specified in (a). [ 33: ] (B) Electrostatic Hand-Spraying Equipment. This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, or precipitation of flammable and combustible materials for coatings on articles, or for other similar purposes in which the charging or atomizing device is hand-held and manipulated during the spraying operation. Electrostatic hand-spraying equipment and devices used in connection with paintspraying operations shall be of listed types and shall comply with (B)(1) through (B)(5). 46 of 270 4/16/ :12 AM

248 (1) General. The high-voltage circuits shall be designed so as not to produce a spark of sufficient intensity to ignite the most readily ignitible of those vapor air mixtures likely to be encountered, or result in appreciable shock hazard upon coming in contact with a grounded object under all normal operating conditions. The electrostatically charged exposed elements of the handgun shall be capable of being energized only by an actuator that also controls the coating material supply. (2) Power Equipment. Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside of the Class I location or be identified for the location. Exception: The handgun itself and its connections to the power supply shall be permitted within the Class I location. (3) Handle. The handle of the spraying gun shall be electrically connected to ground by a conductive material and be constructed so that the operator in normal operating position is in direct electrical contact with the grounded handle with a resistance of not more than 1 megohm to prevent buildup of a static charge on the operator s body. Signs indicating the necessity for grounding other persons entering the spray area shall be conspicuously posted. (4) Electrostatic Equipment. All electrically conductive objects in the spraying area, except those objects required by the process to be at high voltage, shall be electrically connected to ground with a resistance of not more than 1 megohm. This requirement shall apply to paint containers, wash cans, and any other electrical conductive objects or devices in the area. The equipment shall carry a prominent, permanently installed warning regarding the necessity for this grounding feature. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. (5) Support of Objects. Objects being painted shall be maintained in electrical contact with the conveyor or other grounded support. Hooks shall be regularly cleaned to ensure adequate grounding of 1 megohm or less. Areas of contact shall be sharp points or knife edges where possible. Points of support of the object shall be concealed from random spray where feasible; and, where the objects being sprayed are supported from a conveyor, the point of attachment to the conveyor shall be located so as to not collect spray material during normal operation. [ 33: Chapter 12] (C) Powder Coating. This section shall apply to processes in which combustible dry powders are applied. The hazards associated with combustible dusts are present in such a process to a degree, depending on the chemical composition of the material, particle size, shape, and distribution. (1) Electrical Equipment and Sources of Ignition. Electrical equipment and other sources of ignition shall comply with the requirements of Article 502. Portable electric luminaires and other utilization equipment shall not be used within a Class II location during operation of the finishing processes. Where such luminaires or utilization equipment are used during cleaning or repairing operations, they shall be of a type identified for Class II, Division 1 locations, and all exposed metal parts shall be connected to an equipment grounding conductor. Exception: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type listed for Class II, Division 1 locations where readily ignitible residues may be present. (2) Fixed Electrostatic Spraying Equipment. The provisions of (A) and (C)(1) shall apply to fixed electrostatic spraying equipment. (3) Electrostatic Hand-Spraying Equipment. The provisions of (B) and (C)(1) shall apply to electrostatic hand-spraying equipment. 47 of 270 4/16/ :12 AM

249 (4) Electrostatic Fluidized Beds. Electrostatic fluidized beds and associated equipment shall be of identified types. The high-voltage circuits shall be designed such that any discharge produced when the charging electrodes of the bed are approached or contacted by a grounded object shall not be of sufficient intensity to ignite any powder air mixture likely to be encountered or to result in an appreciable shock hazard. (0) Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside the powder-coating area or shall otherwise comply with the requirements of (C)(1). Exception: The charging electrodes and their connections to the power supply shall be permitted within the powder-coating area. (0) All electrically conductive objects within the powder-coating area shall be adequately grounded. The powder-coating equipment shall carry a prominent, permanently installed warning regarding the necessity for grounding these objects. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. (0) Objects being coated shall be maintained in electrical contact (less than 1 megohm) with the conveyor or other support in order to ensure proper grounding. Hangers shall be regularly cleaned to ensure effective electrical contact. Areas of electrical contact shall be sharp points or knife edges where possible. (0) The electrical equipment and compressed air supplies shall be interlocked with a ventilation system so that the equipment cannot be operated unless the ventilating fans are in operation. [ 33: Chapter 15] Grounding. All metal raceways, the metal armors or metallic sheath on cables, and all non current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding shall comply with , , or , as applicable. Part II. Open Containers 48 of 270 4/16/ :12 AM

250 49 of 270 4/16/ :12 AM Area Classification. For open containers, supply containers, waste containers, spray gun cleaners, and solvent distillation units that contain Class I liquids that are located in ventilated areas, electrical area classification shall be in accordance with the following: (1) The area within 915 mm (3 ft) in all directions from any such container or equipment and extending to the floor or grade level shall be classified as Class I, Division 1 or Class I, Zone 1, whichever is applicable. [ 33: ] (2) The area extending 610 mm (2 ft) beyond the Division 1 or Zone 1 location shall be classified as Class I, Division 2 or Class I, Zone 2, whichever is applicable. [ 33: ] (3) The area extending 1525 mm (5 ft) horizontally beyond the area described in (b) up to a height of 460 mm (18 in.) above the floor or grade level shall be classified as Class I, Division 2 or Class I, Zone 2, whichever is applicable. [ 33: ] (4) The area inside any tank or container shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable. [ 33: ] (5) Sumps, pits, or below grade channels within 3.5 m (10 ft) horizontally of a vapor source shall be classified as Class I, Division 1 or Zone 1. If the sump, pit, or channel extends beyond 3.5 m (10 ft) from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 or Zone 1 for its entire length. For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [ 33: 6.2.3] Electrical wiring and utilization equipment installed in these areas shall be suitable for the location, as shown in Figure [ 33: ] Figure Electrical Area Classification for Class I Liquid Operations Around Open Containers, Supply Containers, Waste Containers, Spray Gun Cleaners, and Solvent Distillation Units. [ 33: Figure ] Part III. Spray Application Processes Area Classification. For spray application processes, the area classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitable or explosive mixtures with air. (A) Zone Classification of Locations.

251 (1) Classification of Locations. The Zone system of electrical area classification shall be applied as follows: (1) The inside of closed containers or vessels shall be considered a Class I, Zone 0 location. (2) A Class I, Division 1 location shall be permitted to be alternatively classified as a Class I, Zone 1 location. (3) A Class I, Division 2 location shall be permitted to be alternatively classified as a Class I, Zone 2 location. (4) A Class II, Division 1 location shall be permitted to be alternatively classified as a Zone 21 location. (5) A Class II, Division 2 location shall be permitted to be alternatively classified as a Zone 22 location. [ 33: 6.2.2] (2) For the purposes of electrical area classification, the Division system and the Zone system shall not be intermixed for any given source of release. [ 33: 6.2.3] (3) In instances of areas within the same facility classified separately, Class I, Zone 2 locations shall be permitted to abut, but not overlap, Class I, Division 2 locations. Class I, Zone 0 or Zone 1 locations shall not abut Class I, Division 1 or Division 2 locations. [ 70: 505.7(B)] [ 33: 6.2.4] (4) Open flames, spark-producing equipment or processes, and equipment whose exposed surfaces exceed the autoignition temperature of the material being sprayed shall not be located in a spray area or in any surrounding area that is classified as Division 2, Zone 2, or Zone 22. [ 33: 6.2.5] Exception: This requirement shall not apply to drying, curing, or fusing apparatus. (5) Any utilization equipment or apparatus that is capable of producing sparks or particles of hot metal and that is located above or adjacent to either the spray area or the surrounding Division 2, Zone 2, or Zone 22 areas shall be of the totally enclosed type or shall be constructed to prevent the escape of sparks or particles of hot metal. [ 33: 6.2.6] (B) Class I, Division 1 or Class I, Zone 0 Locations. The interior of any open or closed container or vessel of a flammable liquid shall be considered Class I, Division 1, or Class I, Zone 0, as applicable: Informational Note: For additional guidance, see Chapter 6 of NFPA , Standard for Spray Application Using Flammable or Combustible Materials. (C) Class I, Division 1; Class I, Zone 1; Class II, Division 1; or Zone 21 Locations. The following spaces shall be considered Class I, Division 1; Class I, Zone 1; Class II, Division 1; or Zone 21 locations, as applicable: (1) The interior of spray booths and rooms except as specifically provided in 516.5(D). (2) The interior of exhaust ducts. (3) Any area in the direct path of spray operations. (4) Sumps, pits, or below grade channels within 7.5 m (25 ft) horizontally of a vapor source. If the sump, pit, or channel extends beyond 7.5 m (25 ft) from the vapor source, it shall be provided with a vapor stop or it shall be classified as Class I, Division 1 for its entire length. [ 34: 6.4.1] (5) All space in all directions outside of but within 900 mm (3 ft) of open containers, supply containers, spray gun cleaners, and solvent distillation units containing flammable liquids. (6) For limited finishing workstations, the area inside the curtains or partitions. [See Figure 516.5(D)(5).] (D) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations. The spaces listed in 516.5(D)(1) through (D)(5) shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 as applicable. 50 of 270 4/16/ :12 AM

252 51 of 270 4/16/ :12 AM (1) Unenclosed Spray Processes. For unenclosed spraying, all space outside of but within 6 m (20 ft) horizontally and 3 m (10 ft) vertically of the Class I, Division 1 or Class I, Zone 1 location as defined in 516.5(A) and not separated from it by partitions. [See Figure 516.5(D)(1).] [ 33: 6.5.1] Figure 516.5(D)(1) Electrical Area Classification for Unenclosed Spray Areas. [33:Figure 6.5.1] (2) Closed-Top, Open-Face, and Open-Front Spray Booths and Spray Rooms. If spray application operations are conducted within a closed-top, open-face, or open-front booth or room, as shown in Figure 516.5(D)(2), any electrical wiring or utilization equipment located outside of the booth or room but within 915 mm (3 ft) of any opening shall be suitable for Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. The Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations shown in Figure 516.5(D)(2) shall extend from the edges of the open face or open front of the booth or room. Figure 516.5(D)(2) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to a Closed Top, Open Face, or Open Front Spray Booth or Room. [33:Figure 6.5.2] (3) Open-Top Spray Booths. For spraying operations conducted within an open top spray booth, the space 915 mm (3 ft) vertically above the booth and within 915 mm (3 ft) of other booth openings shall be considered Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 whichever is applicable. [ 33: 6.5.3]

253 52 of 270 4/16/ :12 AM (4) Enclosed Spray Booths and Spray Rooms. For spray application operations confined to an enclosed spray booth or room, electrical area classification shall be as follows: [ 33: 6.5.4] (1) The area within 915 mm (3 ft) of any opening shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, as shown in Figure 516.5(D)(4). (2) Where automated spray application equipment is used, the area outside the access doors shall be unclassified provided the door interlock prevents the spray application operations when the door is open. (3) Where exhaust air is permitted to be recirculated, both of the following shall apply: a. The interior of any recirculation path from the secondary particulate filters up to and including the air supply plenum shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable. b. The interior of fresh air supply ducts shall be unclassified. [ 33: 6.5.4] (4) Where exhaust air is not recirculated, the interior of fresh air supply ducts and fresh air supply plenums shall be unclassified. [ 33: 6.5.4]

254 53 of 270 4/16/ :12 AM (5) Limited Finishing Workstations. For limited finishing workstations, the area inside the 915 mm (3 ft) space horizontally and vertically beyond the volume enclosed by the outside surface of the curtains or partitions shall be classified as Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22, as shown in Figure 516.5(D)(5). Figure 516.5(D)(4) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure 6.5.4] Figure 516.5(D)(5) Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 Locations Adjacent to an Enclosed Spray Booth or Spray Room. [33:Figure ] Wiring and Equipment in Class I Locations. (A) Wiring and Equipment Vapors. All electrical wiring and equipment within the Class I location (containing vapor only not residues) defined in shall comply with the applicable provisions of Article 501 or Article 505, as applicable.

255 54 of 270 4/16/ :12 AM (B) Wiring and Equipment Vapors and Residues. Unless specifically listed for locations containing deposits of dangerous quantities of flammable or combustible vapors, mists, residues, dusts, or deposits (as applicable), there shall be no electrical equipment in any spray area as herein defined whereon deposits of combustible residue may readily accumulate, except wiring in rigid metal conduit, intermediate metal conduit, Type MI cable, or in metal boxes or fittings containing no taps, splices, or terminal connections. [ 33: 6.4.2]

256 55 of 270 4/16/ :12 AM (C) Illumination.

257 Luminaires shall be permitted to be installed as follows: (1) Luminaires, like that shown in Figure 516.6(C)(a), that are attached to the walls or ceiling of a spray area but that are outside any classified area and are separated from the spray area by glass panels shall be suitable for use in unclassified locations. Such fixtures shall be serviced from outside the spray area. [ 33: 6.6.1] (2) Luminaires, like that shown in Figure 516.6(C)(a), that are attached to the walls or ceiling of a spray area; that are separated from the spray area by glass panels and that are located within a Class I, Division 2; a Class I, Zone 2; a Class II, Division 2; or a Zone 22 location shall be suitable for such location. Such fixtures shall be serviced from outside the spray area. [ 33: 6.6.2] (3) Luminaires, like that shown in Figure 516.6(C)(b), that are an integral part of the walls or ceiling of a spray area shall be permitted to be separated from the spray area by glass panels that are an integral part of the fixture. Such fixtures shall be listed for use in Class I, Division 2; Class I, Zone 2; Class II, Division 2; or Zone 22 locations, whichever is applicable, and also shall be listed for accumulations of deposits of combustible residues. Such fixtures shall be permitted to be serviced from inside the spray area. [ 33: 6.6.3] (4) Glass panels used to separate luminaires from the spray area or that are an integral part of the luminaire shall meet the following requirements. a. Panels for light fixtures or for observation shall be of heat-treated glass, laminated glass, wired glass, or hammered-wired glass and shall be sealed to confine vapors, mists, residues, dusts, and deposits to the spray area. [ 33: 5.5.1] Exception: Listed spray booth assemblies that have vision panels constructed of other materials shall be permitted. b. Panels for light fixtures shall be separated from the fixture to prevent the surface temperature of the panel from exceeding 93 C (200 F). [ 33: 5.5.2] c. The panel frame and method of attachment shall be designed to not fail under fire exposure before the vision panel fails. [ 33: 5.5.3] Figure 516.6(C)(a) Example of a Luminaire that is Mounted Outside of the Spray Area and is Serviced from Outside the Spray Area. [33:Figure 6.6.1] Figure 516.6(C)(b) Example of a Luminaire that is an Integral Part of the Spray Area and is Serviced from Inside the Spray Area. [33:Figure 6.6.3] 56 of 270 4/16/ :12 AM

258 57 of 270 4/16/ :12 AM (D) Portable Equipment. Portable electric luminaires or other utilization equipment shall not be used in a spray area during spray operations. Exception No. 1: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type identified for Class I, Division 1 or Class 1, Zone 1 locations where readily ignitible residues may be present. [ 33: 6.9 Exception] Exception No. 2: Where portable electric drying apparatus is used in spray booths and the following requirements are met: (a) (b) (c) (d) The apparatus and its electrical connections are not located within the spray enclosure during spray operations. Electrical equipment within 450 mm (18 in.) of the floor is identified for Class I, Division 2 or Class I, Zone 2 locations. All metallic parts of the drying apparatus are electrically bonded and grounded. Interlocks are provided to prevent the operation of spray equipment while drying apparatus is within the spray enclosure, to allow for a 3-minute purge of the enclosure before energizing the drying apparatus and to shut off drying apparatus on failure of ventilation system. (E) Electrostatic Equipment. Electrostatic spraying or detearing equipment shall be installed and used only as provided in Informational Note: For further information, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials. (F) Static Electric Discharges. All persons and all electrically conductive objects, including any metal parts of the process equipment or apparatus, containers of material, exhaust ducts, and piping systems that convey flammable or combustible liquids, shall be electrically grounded. [ 34: 6.8.1] Wiring and Equipment Not Within Classified Locations.

259 58 of 270 4/16/ :12 AM (A) Wiring. All fixed wiring above the Class I and II locations shall be in metal raceways, Type PVC conduit, Type RTRC conduit, or electrical nonmetallic tubing; where cables are used, they shall be Type MI, Type TC, or Type MC cable. Cellular metal floor raceways shall only be permitted to supply ceiling outlets or as extensions to the area below the floor of a Class I or II location. Where cellular metal raceways, are used, they shall not have connections leading into or passing through the Class I or II location unless suitable seals are provided. (B) Equipment. Equipment that may produce arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed so as to prevent the escape of sparks or hot metal particles Special Equipment. (A) Fixed Electrostatic Equipment. This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, and/or precipitation of hazardous materials for coatings on articles or for other similar purposes in which the charging or atomizing device is attached to a mechanical support or manipulator. This shall include robotic devices. This section shall not apply to devices that are held or manipulated by hand. Where robot or programming procedures involve manual manipulation of the robot arm while spraying with the high voltage on, the provisions of (B) shall apply. The installation of electrostatic spraying equipment shall comply with (A)(1) through (A)(10). Spray equipment shall be listed. All automatic electrostatic equipment systems shall comply with 516.6(A) through (E). (1) Power and Control Equipment. Transformers, high-voltage supplies, control apparatus, and all other electrical portions of the equipment shall be installed outside of the Class I location or be of a type identified for the location. Exception: High-voltage grids, electrodes, electrostatic atomizing heads, and their connections shall be permitted within the Class I location. (2) Electrostatic Equipment. Electrodes and electrostatic atomizing heads shall be adequately supported in permanent locations and shall be effectively insulated from ground. Electrodes and electrostatic atomizing heads that are permanently attached to their bases, supports, reciprocators, or robots shall be deemed to comply with this section. (3) High-Voltage Leads. High-voltage leads shall be properly insulated and protected from mechanical damage or exposure to destructive chemicals. Any exposed element at high voltage shall be effectively and permanently supported on suitable insulators and shall be effectively guarded against accidental contact or grounding. (4) Support of Goods. Goods being coated using this process shall be supported on conveyors or hangers. The conveyors or hangers shall be arranged (1) to ensure that the parts being coated are electrically connected to ground with a resistance of 1 megohm or less and (2) to prevent parts from swinging. (5) Automatic Controls. Electrostatic apparatus shall be equipped with automatic means that will rapidly de-energize the high-voltage elements under any of the following conditions: (1) Stoppage of ventilating fans or failure of ventilating equipment from any cause (2) Stoppage of the conveyor carrying goods through the high-voltage field unless stoppage is required by the spray process (3) Occurrence of excessive current leakage at any point in the high-voltage system (4) De-energizing the primary voltage input to the power supply

260 (6) Grounding. All electrically conductive objects in the spray area, except those objects required by the process to be at high voltage, shall be adequately grounded. This requirement shall apply to paint containers, wash cans, guards, hose connectors, brackets, and any other electrically conductive objects or devices in the area. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. (7) Isolation. Safeguards such as adequate booths, fencing, railings, interlocks, or other means shall be placed about the equipment or incorporated therein so that they, either by their location, character, or both, ensure that a safe separation of the process is maintained. (8) Signs. Signs shall be conspicuously posted to convey the following: (1) Designate the process zone as dangerous with regard to fire and accident (2) Identify the grounding requirements for all electrically conductive objects in the spray area (3) Restrict access to qualified personnel only (9) Insulators. All insulators shall be kept clean and dry. (10) Other Than Nonincendive Equipment. Spray equipment that cannot be classified as nonincendive shall comply with (A)(10)(a) and (A)(10)(b). (a) (b) Conveyors, hangers, and application equipment shall be arranged so that a minimum separation of at least twice the sparking distance is maintained between the workpiece or material being sprayed and electrodes, electrostatic atomizing heads, or charged conductors. Warnings defining this safe distance shall be posted. [ 33: ] The equipment shall provide an automatic means of rapidly de-energizing the high-voltage elements in the event the distance between the goods being painted and the electrodes or electrostatic atomizing heads falls below that specified in (a). [ 33: ] (B) Hand-Spraying Electrostatic Equipment. This section shall apply to any equipment using electrostatically charged elements for the atomization, charging, or precipitation of flammable and combustible materials for coatings on articles, or for other similar purposes in which the charging or atomizing device is hand-held and manipulated during the spraying operation. Electrostatic hand-spraying equipment and devices used in connection with paintspraying operations shall be of listed types and shall comply with (B)(1) through (B)(5). (1) General. The high-voltage circuits shall be designed so as not to produce a spark of sufficient intensity to ignite the most readily ignitible of those vapor air mixtures likely to be encountered, or result in appreciable shock hazard upon coming in contact with a grounded object under all normal operating conditions. The electrostatically charged exposed elements of the handgun shall be capable of being energized only by an actuator that also controls the coating material supply. (2) Power Equipment. Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside of the Class I location or be identified for the location. Exception: The handgun itself and its connections to the power supply shall be permitted within the Class I location. 59 of 270 4/16/ :12 AM

261 60 of 270 4/16/ :12 AM (3) Handle. The handle of the spraying gun shall be electrically connected to ground by a conductive material and be constructed so that the operator in normal operating position is in electrical contact with the grounded handle with a resistance of not more than 1 megohm to prevent buildup of a static charge on the operator s body. Signs indicating the necessity for grounding other persons entering the spray area shall be conspicuously posted. (4) Electrostatic Equipment. All electrically conductive objects in the spraying area, except those objects required by the process to be at high voltage shall be electrically connected to ground with a resistance of not more than 1 megohm. This requirement shall apply to paint containers, wash cans, and any other electrical conductive objects or devices in the area. The equipment shall carry a prominent, permanently installed warning regarding the necessity for this grounding feature. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. (5) Support of Objects. Objects being painted shall be maintained in electrical contact with the conveyor or other grounded support. Hooks shall be regularly cleaned to ensure adequate grounding of 1 megohm or less. Areas of contact shall be sharp points or knife edges where possible. Points of support of the object shall be concealed from random spray where feasible; and, where the objects being sprayed are supported from a conveyor, the point of attachment to the conveyor shall be located so as to not collect spray material during normal operation. (C) Powder Coating. This section shall apply to processes in which combustible dry powders are applied. The hazards associated with combustible dusts are present in such a process to a degree, depending on the chemical composition of the material, particle size, shape, and distribution. (1) Electrical Equipment and Sources of Ignition. Electrical equipment and other sources of ignition shall comply with the requirements of Article 502. Portable electric luminaires and other utilization equipment shall not be used within a Class II location during operation of the finishing processes. Where such luminaires or utilization equipment are used during cleaning or repairing operations, they shall be of a type identified for Class II, Division 1 locations, and all exposed metal parts shall be connected to an equipment grounding conductor. Exception: Where portable electric luminaires are required for operations in spaces not readily illuminated by fixed lighting within the spraying area, they shall be of the type listed for Class II, Division 1 locations where readily ignitible residues may be present. (2) Fixed Electrostatic Spraying Equipment. The provisions of (A) and (C)(1) shall apply to fixed electrostatic spraying equipment. (3) Electrostatic Hand-Spraying Equipment. The provisions of (B) and (C)(1) shall apply to electrostatic hand-spraying equipment.

262 61 of 270 4/16/ :12 AM (4) Electrostatic Fluidized Beds. Electrostatic fluidized beds and associated equipment shall be of identified types. The high-voltage circuits shall be designed such that any discharge produced when the charging electrodes of the bed are approached or contacted by a grounded object shall not be of sufficient intensity to ignite any powder air mixture likely to be encountered or to result in an appreciable shock hazard. (a) (b) (c) (d) Transformers, power packs, control apparatus, and all other electrical portions of the equipment shall be located outside the powder-coating area or shall otherwise comply with the requirements of (C)(1). Exception: The charging electrodes and their connections to the power supply shall be permitted within the powder-coating area. All electrically conductive objects within the powder-coating area shall be adequately grounded. The powder-coating equipment shall carry a prominent, permanently installed warning regarding the necessity for grounding these objects. Informational Note: For more information on grounding and bonding for static electricity purposes, see NFPA , Standard for Spray Application Using Flammable or Combustible Materials ; NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids ; and NFPA , Recommended Practice on Static Electricity. Objects being coated shall be maintained in electrical contact (less than 1 megohm) with the conveyor or other support in order to ensure proper grounding. Hangers shall be regularly cleaned to ensure effective electrical contact. Areas of electrical contact shall be sharp points or knife edges where possible. The electrical equipment and compressed air supplies shall be interlocked with a ventilation system so that the equipment cannot be operated unless the ventilating fans are in operation. [ 33: Chapter 15] Grounding. All metal raceways, the metal armors or metallic sheath on cables, and all non current-carrying metal parts of fixed or portable electrical equipment, regardless of voltage, shall be grounded and bonded. Grounding and bonding shall comply with , , or , as applicable. Part IV. Spray Application Operations in Membrane Enclosures Membrane Enclosure Use. Spray application operations within both outdoor and indoor temporary membrane enclosures shall be limited to workpieces that cannot be moved into a spray booth and where open spraying is not practical due to the proximity to other operations, finish quality, or concerns such as the collection of overspray. (1) Spray application operations and processes within the enclosure shall only be permitted for the workpiece for which the enclosure was erected. (2) Spray application operations for parts removed from the workpiece shall be conducted in accordance with applicable requirements of this standard. (3) Membrane enclosures shall be erected for 180 days or less. (4) Enclosures erected under this chapter shall only be used for the duration of a spray operation at a fixed location which can involve multiple coats for a single workpiece. (5) Membrane material shall not be reused for any other spray application operations. (6) Operations conducted within the enclosure other than spray applications shall meet the fire and safety requirements for those operations. (7) These operations shall not take place while the spray application operation is in progress. Informational Note: For additional guidance, see Chapter 18 of NFPA , Standard for Spray Application Using Flammable or Combustible Materials Location of Temporary Membrane Enclosures. Temporary membrane enclosures shall be permitted to be located in accordance with (A) and (B).

263 (A) Outside of Buildings. The spray area shall be separated from permanent structures by a minimum of 4.6 m (15 ft). (B) Inside of Buildings. Membrane enclosures for spray painting shall be permitted to be installed in buildings provided all of the requirements are met Membrane Material. Membrane materials shall comply with the following requirements: (1) Material used in a vertical plane for membrane enclosures shall have been tested and passed the NFPA , Standard Methods of Fire Tests for Flame Propagation of Textiles and Films, Test 2 requirements. (2) Other than material in a vertical plane, the membrane material shall be listed for installation beneath sprinklers and in installed to meet the requirements of of NFPA , Standard for the Installation of Sprinkler Systems. (3) Where a listed membrane material is used, it shall be considered a drop-out ceiling in NFPA , Standard for the Installation of Sprinkler Systems, and follow the applicable requirements for those assemblies. Informational Note: Buildings in which membrane enclosures are installed are provided with automatic sprinkler systems in accordance with the requirements for indoor membrane enclosures of NFPA , Standard for Spray Application Using Flammable or Combustible Materials Area Classification for Temporary Membrane Enclosures. The area classification shall be as given in (A)(1) through (A)(8) and is illustrated by Figure of 270 4/16/ :12 AM

264 63 of 270 4/16/ :12 AM (A) Classification of Locations. The zone system of electrical area classification shall be applied as follows: (1) A 1.5 m (5 ft) zone outside of the membrane enclosure shall be considered Class I, Division 2, as shown in Figure (2) All lighting, electrical power cords, and any related equipment within the membrane enclosure shall be rated for Class I Division 1 as defined by NFPA 70 when used during spray paint operations. (3) All lighting, electrical power cords, and any related equipment within the 1.5 m (5 ft) distance horizontally from the exterior of the membrane enclosure shall be listed for Class I Division 2 as defined by NFPA 70 when used during spray paint operations. (4) All power to the workpiece shall be removed during spray painting (5) Workpieces shall be grounded. (6) Scaffolding shall be bonded to the workpiece and grounded to an appropriate grounding rod or other approved method consistent with referenced requirements. (7) Spray paint equipment shall be grounded. (8) Equipment used to monitor the concentration of solvent vapors shall be calibrated for the solvents used. The calibration frequency shall be per the manufacturer s recommendations. Figure Electrical Classifications for Temporary Outdoor Membrane Enclosures [33:Figure ] Electrical and Other Sources of Ignition. Electrical wiring and utilization equipment used in membrane enclosures during spray painting shall comply with 516.5(A)(1).

265 64 of 270 4/16/ :12 AM Ventilation. Each membrane enclosure shall be provided with mechanical ventilation consistent with the following: (1) The ventilation system shall be designed and installed to ensure that the enclosure is maintained at a pressure that is negative relative to the surrounding environs. (2) The concentration of the vapors and mists in the exhaust stream of the ventilation system during spray operations and ambient air drying operations shall not exceed 10 percent of the lower flammable limit. (3) All spray operations within the membrane enclosure shall cease operations when the concentration of the vapors and mists in the exhaust stream of the ventilation system reaches or exceeds 10 percent of the lower flammable limit. (4) An interlock shall be provided so that the spray apparatus is automatically stopped if the ventilation system fails to maintain the concentration of the vapors and mists in the exhaust stream below 10 percent of the lower flammable limit. (5) Where interlocks cannot be effectively provided for ventilation equipment that uses plant air, large air storage tanks, or equipment that cannot be instantly shut off, an audible alarm upon loss of ventilation that will alert all spray paint operators shall be permitted with authority having jurisdiction approval. (6) Exhaust air shall be taken from one or more points within 300 mm (12 in.) of the floor of the enclosure. (7) An adequate supply of clean make-up air shall be provided per the requirements of NFPA , Standard for Spray Application Using Flammable or Combustible Materials. (8) The location of both the exhaust and make-up air openings shall be arranged to provide air movement throughout the enclosure and across all portions of the floor to prevent accumulation of flammable vapors. Each membrane spray enclosure shall be provided with mechanical ventilation that is capable of confining and removing vapors and mists to a safe location and is capable of confining and controlling combustible residues, dusts, and deposits. The concentration of the vapors and mists in the exhaust stream of the ventilation system shall not exceed 25 percent of the lower flammable limit. (9) Air exhausted from the membrane enclosure shall not be recirculated. Air exhausted to the atmosphere from liquid spray operations shall be conducted by ducts directly to the outside of the building. Exhaust ducts shall follow the most direct route to the point of discharge but shall not penetrate a fire wall. The exhaust discharge shall be directed away from any fresh air intakes. The exhaust duct discharge point shall be at least 1830 mm (6 ft) from any exterior wall or roof. The exhaust duct shall not discharge in the direction of any combustible construction that is within 7625 mm (25 ft) of the exhaust duct discharge point, nor shall it discharge in the direction of any unprotected opening in any noncombustible or limitedcombustible construction that is within 7625 mm (25 ft) of the exhaust duct discharge point Drying. Membrane enclosures used for spray application of flammable or combustible materials shall not be used for drying, curing, or fusing operations at elevated temperature. Freshly sprayed workpieces shall be dried only in spaces that are ventilated to prevent the concentration of vapors from exceeding 10 percent of the lower flammable limit Facilities Compliance Permitting. Spray application within temporary membrane enclosures shall be permitted and approved. Informational Note: Spray application within temporary membrane enclosures can occur only after the requirements of Chapter 18 of NFPA , Standard for Spray Application Using Flammable or Combustible Materials, are met. Part V. Printing, Dipping, and Coating Processes

266 65 of 270 4/16/ :12 AM Classification of Locations.

267 66 of 270 4/16/ :12 AM Classification is based on quantities of flammable vapors, combustible mists, residues, dusts, or deposits that are present or might be present in quantities sufficient to produce ignitable or explosive mixtures with air. Electrical wiring and electrical utilization equipment located adjacent to open processes shall comply with the requirements as follows. Examples of these requirements are illustrated in Figure (a), Figure (b), Figure (c), and Figure (d). Informational Note: For additional guidance, see Chapter 6 of NFPA , Standard for Spray Application Using Flammable or Combustible Materials, and Chapter 6 of NFPA , Standard for Dipping, Coating, and Printing Processes Using Flammable or Combustible Liquids. (1) Electrical wiring and electrical utilization equipment located in any sump, pit, or below grade channel that is within 7620 mm (25 ft) horizontally of a vapor source, as defined by this standard, shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. If the sump, pit, or channel extends beyond 7620 mm (25 ft) of the vapor source, it shall be provided with a vapor stop, or it shall be classified as Class I, Division 1 or Class I, Zone 1 for its entire length. [ 34: 6.4.1] (2) Electrical wiring and electrical utilization equipment located within 1525 mm (5 ft) of a vapor source shall be suitable for Class I, Division 1 or Class I, Zone 1 locations. The space inside a dip tank, ink fountain, ink reservoir, or ink tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable. (3) Electrical wiring and electrical utilization equipment located within 915 mm (3 ft) of the Class I, Division 1 or Class I, Zone 1 location shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable. (4) The space 915 mm (3 ft) above the floor and extending 6100 mm (20 ft) horizontally in all directions from the Class I, Division 1 or Class I, Zone 1 location shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 or Class I, Zone 2 locations, whichever is applicable. (5) This space shall be permitted to be nonclassified for purposes of electrical installations if the surface area of the vapor source does not exceed 0.5 m 2 (5 ft 2 ), the contents of the dip tank, ink fountain, ink reservoir, or ink tank do not exceed 19 L (5 gal), and the vapor concentration during operating and shutdown periods does not exceed 25 percent of the lower flammable limit. Figure (a) Electrical Area Classification for Open Dipping and Coating Processes Without Vapor Containment or Ventilation. [34:Figure 6.4(a)] Figure (b) Electrical Area Classification for Open Dipping and Coating Processes with Peripheral Vapor Containment and Ventilation Vapors Confined to Process Equipment. [34:Figure 6.4(b)]

268 67 of 270 4/16/ :12 AM Figure (c) Electrical Area Classification for Open Dipping and Coating Processes with Partial Peripheral Vapor Containment and Ventilation Vapors NOT Confined to Process Equipment. [34:Figure 6.4(c)] Figure (d) Electrical Area Classification for a Typical Printing Process. [34:Figure 6.4(d)]

269 Areas Adjacent to Enclosed Dipping and Coating Processes. Areas adjacent to enclosed dipping and coating processes are illustrated by Figure and shall be classified as follows: (1) The interior of any enclosed dipping or coating process or apparatus shall be a Class I, Division 1 or Class I, Zone 1 location, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 1 or Class I, Zone 1 locations, whichever is applicable. The area inside the dip tank shall be classified as Class I, Division 1 or Class I, Zone 0, whichever is applicable. (2) The space within 915 mm (3 ft) in all directions from any opening in the enclosure and extending to the floor or grade level shall be classified as Class I, Division 2 or Class I, Zone 2, and electrical wiring and electrical utilization equipment located within this space shall be suitable for Class I, Division 2 locations or Class I, Zone 2 locations, whichever is applicable. (3) All other spaces adjacent to an enclosed dipping or coating process or apparatus shall be classified as nonhazardous for purposes of electrical installations. Figure Electrical Area Classification Around Enclosed Dipping and Coating Processes. [34:Figure 6.5] Equipment and Containers in Ventilated Areas. Open containers, supply containers, waste containers, and solvent distillation units that contain Class I liquids shall be located in areas ventilated in accordance with Luminaires. For printing, coating and dipping equipment where the process area is enclosed by glass panels that are sealed to confine vapors and mists to the inside of the enclosure, luminaires that are attached to the walls or ceilings of a process enclosure and that are located outside of any classified area shall be permitted to be of general purpose construction. Such luminaires shall be serviced from outside the enclosure. Luminaires that are attached to the walls or ceilings of a process enclosure, are located within the Class I, Division 2 or Class I, Zone 2 location, and are separated from the process area by glass panels that are sealed to confine vapors and mists shall be suitable for use in that location. Such fixtures shall be serviced from outside the enclosure Wiring and Equipment Not Within Classified Locations. (A) Wiring. All fixed wiring above the Class I and II locations shall be in metal raceways, Type PVC conduit, Type RTRC conduit, or electrical nonmetallic tubing; where cables are used, they shall be Type MI, Type TC, or Type MC cable. Cellular metal floor raceways shall only be permitted to supply ceiling outlets or as extensions to the area below the floor of a Class I or II location. Where cellular metal raceways, are used, they shall not have connections leading into or passing through the Class I or II location unless suitable seals are provided. (B) Equipment. Equipment that is capable of producing arcs, sparks, or particles of hot metal, such as lamps and lampholders for fixed lighting, cutouts, switches, receptacles, motors, or other equipment having make-and-break or sliding contacts, where installed above a classified location or above a location where freshly finished goods are handled, shall be of the totally enclosed type or be constructed so as to prevent the escape of sparks or hot metal particles. 68 of 270 4/16/ :12 AM