National Fire Protection Association. 1 Batterymarch Park, Quincy, MA Phone: Fax:

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1 National Fire Protection Association 1 Batterymarch Park, Quincy, MA Phone: Fax: M E M O R A N D U M TO: NEC Code-Making Panel 14 FROM: Kimberly Shea DATE: December 4, 2012 SUBJECT: NFPA 70 CMP-14 ROC TC Letter Ballot (A2013) The ROC letter ballot for NFPA 70 CMP-14 is attached. The ballot is for formally voting on whether or not you concur with the panel s actions on the comments. Reasons must accompany all negative and abstention ballots. Please do not vote negatively because of editorial errors. However, please bring such errors to my attention for action. Please return your ballot as soon as possible but no later than January 11, Ballots may be returned via to panel14@nfpa.org or via fax to You may also mail your ballot to the attention of Kim Shea at NFPA, 1 Batterymarch Park, Quincy, MA The return of ballots is required by the Regulations Governing Committee Projects. Attachments: Comments Letter Ballot

2 Sort Listing Comment # Log# Comm. Action Tech. Comm. Section A NEC-P14 - ( ): R NEC-P14 - ( 500.2, (B)(4), (B)(4), ): R NEC-P14 - ( 500.2, (B)(4), (B)(4), ): APR NEC-P14 - ( 500.2, 504.2, 505.2, 506.2, 513.2, 515.2, and ): R NEC-P14 - ( Combustible Dust ): APR NEC-P14 - ( Combustible Dust ): 14-7 NEC-P R Electrical and Electronic Equipment - ( ): A NEC-P14 - ( 500.4(B), Informational Note 2 ): A NEC-P14 - ( 500.4(B), Informational Note 4 ): A NEC-P14 - ( (B)(1)(7) ): A NEC-P14 - ( (A)(1)(e) ): APR NEC-P14 - ( (A)(1)(e) (New) ): A NEC-P14 - ( (B)(2) ): A NEC-P14 - ( (B)(2), (B)(2)(6)(New) ): A NEC-P14 - ( (E)(1) ): A NEC-P14 - ( (E)(1) ): APP NEC-P14 - ( (B)(2) ): A NEC-P14 - ( (A)(4) ): A NEC-P14 - ( ): A NEC-P14 - ( (B)(6) ): A NEC-P14 - ( (B)(6)(1) ): A NEC-P14 - ( (B) Informational Note 4 ): A NEC-P14 - ( (B)(4) Exception ): R NEC-P14 - ( (B)(4) ): A NEC-P14 - ( (A)(1)(5) ): A NEC-P14 - ( (B)(1)(8) ): A NEC-P14 - ( (B)(2)(6) (New) ): A NEC-P14 - ( (A) ): A NEC-P14 - ( (B)(3) ): R NEC-P14 - ( (B)(4) ): A NEC-P14 - ( ): R NEC-P14 - ( (B)(4) ): A NEC-P14 - ( 504 ): APR NEC-P14 - ( Associated Apparatus ): R NEC-P14 - ( ): A NEC-P14 - ( (B) ): R NEC-P14 - ( and (5) ): A NEC-P14 - ( 505.5(A) ): A NEC-P14 - ( 505.6, Informational Note 2 ): A NEC-P14 - ( 505.7(F) (New) ): Cycle A2013 Page 1

3 Sort Listing Comment # Log# Comm. Action Tech. Comm. Section A NEC-P14 - ( ): A NEC-P14 - ( (B)(1)(g) ): APR NEC-P14 - ( (B)(1)(g) (New) ): APR NEC-P14 - ( (B)(1)(g) (New) ): A NEC-P14 - ( (C)(1)(h) ): A NEC-P14 - ( (B)(1) ): A NEC-P14 - ( , Informational Note ): A NEC-P14 - ( ): R NEC-P14 - ( ): A NEC-P14 - ( ): R NEC-P14 - ( and (5) ): APR NEC-P14 - ( Associated Nonincendive Field Wiring ): R NEC-P14 - ( Combustible Dust ): A NEC-P14 - ( Nonincendive Circuit, Nonincendive ): A NEC-P14 - ( Nonincendive Circuit, Informational Note; ): R NEC-P14 - ( ): R NEC-P14 - ( 506.9(C)(1) ): R NEC-P14 - ( 506.9(C)(2) ): A NEC-P14 - ( (A)(7) ): A NEC-P14 - ( (C)(9) ): R NEC-P14 - ( (D) ): A NEC-P14 - ( ): A NEC-P14 - ( 513.7(F) ): A NEC-P14 - ( (B) ): A NEC-P14 - ( (D)(1) ): A NEC-P14 - ( 516, Informational Note ): A NEC-P14 - ( ): R NEC-P14 - ( Spray Area ): R NEC-P14 - ( Spray Area and (New) ): A NEC-P14 - ( (B)(4) ): A NEC-P14 - ( ): Cycle A2013 Page 2

4 14-1 Log #392 NEC-P14 John L. Simmons, Florida East Coast Electrical JATC 14-3 Revise the text found in Sections 500.2, 504.2, 505.2, 506.2, 513.2, and as follows: Revise the parent text of to include all definitions in Articles that appear in more than one article. A new last sentence is added to make it clear that may have definitions that apply to Articles 505 and 506 but that no other sections of Article 500 apply to 505 or 506 unless they are specifically referenced in the article. This will clarify the intent of CMP14 that Articles 505 and 506 are not a part of the hazardous locations protection methods prescribed in Article 500. Relocate the term associated apparatus from to The term is used in Articles 500, 504, 505 and 506. Include the new term cord connector which was introduced in Proposal 14-11b and accepted by CMP14. Update the standard dates in the informational note for dust-ignitionproof. Change the term dusttight to dusttight (as applied to Hazardous (Classified) Locations). This will in essence remove the conflict between the definition in and Article 100 and it is consistent with the format used in Article 100 to allow two definitions for accessible (accessible (as applied to equipment) and accessible (as applied to wiring methods). Dusttight Informational Note see panel action on Proposal Electrical and Electronic Equipment Informational Note see panel action on Proposal Change the term explosionproof equipment to explosionproof equipment (as applied to Hazardous (Classified) Locations). This will in essence remove the conflict between the definition in and Article 100 and it is consistent with the format used in Article 100 to allow two definitions for accessible (accessible (as applied to equipment) and accessible (as applied to wiring methods). Hermetically Sealed Informational Note see panel action on Proposal Relocate the definition of intrinsically safe apparatus from to The term is found in Articles 500, 503, 504, 505 and 506. Nonincendive Circuit Informational Note see panel action on Proposal Nonincendive Component Informational Note see panel action on Proposal Nonincendive Equipment Informational Note see panel action on Proposal Nonincendive Field Wiring Apparatus Informational Note see panel action on Proposal Delete the Informational Note for Oil Immersion. UL 698 has been withdrawn. Relocate the definition of pressurized and the Informational Note for the definition from to The term is found in Articles 501, 505 and 506. Since the term is also used in Article 326, the phrase as applied to Hazardous (Classified) Locations has been added to make it perfectly clear that this definition is not intended to define the term as used in that article. Relocate the definition of simple apparatus and the Informational Note for the definition from to The term is found in Articles 500, 501, 502, 503, 504, 505 and 506. Create new section Definitions and refer back to This will add clarity to the use of definitions in Articles Create new section Definitions and refer back to This will add clarity to the use of definitions in Articles Create new section Definitions and refer back to This will add clarity to the use of definitions in Articles Create new parent text for The new text will make it perfectly clear that the defined terms in the section apply specifically to Article 504. Delete the definition of associated apparatus" from and relocate it to The term is used in Articles 500, 504, 505 and 506. Delete the control drawing reference to With the proposed restructuring of the definitions in Article it is perfectly clear that defined terms will be found in one of two locations; if the term is used in more than one article and the dot 2 section of the article it appears in, if it is only used in that article. Delete the definition of intrinsically safe apparatus from and relocate it to The term is used in Articles 500, 503, 504, 505, and 506. Update the standard date in the Informational Note for intrinsically safe circuit. Delete the definition of simple apparatus from and relocate it to The term is used in Articles 500, 501, 502, 503, 504, 505, and

5 Revise the parent text for to make it consistent with the new parent text of Delete the definition of combustible gas detection system from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500 and 505. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Delete the definition of electrical and electronic equipment and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500, 501, 502, 503, 505, and 506. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Revise Informational Note 1 and Note 2 for encapsulation 'm'. See the panel action on Proposal Revise the standard information in the Informational Note for flameproof d. See the panel action on Proposal Revise the standard information in the Informational Note for intrinsic safety 'i'. See the panel action on Proposal Oil Immersion o Informational Note: insert the standard date. Powder Filling q Informational Note: insert the standard date. Revise the standard information in the Informational Note for pressurization p. See the panel action on Proposal Revise the standard information in the Informational Note for type of protection n. See the panel action on Proposal Delete the definition of unclassified locations from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500, 501, 502, 503, 504, 505, 506, 513, 514, and 516. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Revise the parent text for to make it consistent with the new parent text of Delete the definition of associated nonincendive field wiring apparatus from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500, and 506. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Delete the definition of combustible dust from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500, 502, 504, 505, 506, and 516. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Delete the definition of dust-ignitionproof and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used Articles 500, 502, and 506. (Other than the definition in the term is only used one other time in 506 and that is in an informational note.) Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Delete the definition of dusttight from The term is defined in Article 100 and sections and in the current version of the NEC (2008). The term is used Articles 500, 502, 503, and 506. Under the proposed restructure, definitions of terms used in more than one article ( ) are being placed in Delete the definition of nonincendive circuit and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used in Articles 500, 501, 502, 503, and 506. Delete the definition of nonincendive equipment and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used in Articles 500, 506, and 516. Delete the definition of nonincendive field wiring from The term is defined in and in the current version of the NEC (2008). The term is used in Articles 500, 501, 502,503, 504, and 506. Delete the definition of nonincendive field wiring apparatus and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used in Articles 500, 501, 502, 503, and 506. Delete the definition of pressurized and its Informational Note from The term is defined in and in the current version of the NEC (2008). The term is used in Articles 501, 505 and 506. Change protection by encapsulation md to protection by encapsulation m and revise the standard in the Informational Note No. 1. Revise Informational Note No. 2. See panel action on Proposal Change protection by enclosure td to protection by encapsulation t and revise the standard in the Informational Note No. 1. Add new Informational Note No. 2. See panel action on Proposal Revise the parent text for to make it consistent with the new parent text of Change the term portable equipment to portable equipment (as applied to Article 513). The term portable equipment appears in Articles 250,368, 430, 490, 511, 513, 516, 517, 518, 520, 525, 530, 540, 640, 668, 675, and 680. The term is defined in Articles 513, 520, 530, 640, and 680. This proposed change makes it clear that the definition found in is specific to Article 513. Delete in its entirety. See Proposal

6 Revise the parent text for to make it consistent with the new parent text of A copy of the NEC code text with proposed changes follows: The definitions found in this section are specific to the Hazardous (Classified) Locations found in For purposes of Articles 500 through 504 and Articles 510 through 516 the following definitions apply. No other section of this Article shall apply to Article 505 or 506 unless it is specifically referenced in that article. Apparatus in which the circuits are not necessarily intrinsically safe themselves but that affect the energy in the intrinsically safe circuits and are relied on to maintain intrinsic safety. Associated apparatus may be either 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. 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. Associated nonincendive field wiring apparatus may be either 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. Any finely divided solid material that is 420 microns (0.017 in.) or smaller in diameter (material passing a U.S. No. 40 Standard Sieve) and presents a fire or explosion hazard when dispersed and ignited in air. [ 2008] A protection technique utilizing stationary gas detectors in industrial establishments. 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. A fitting intended to terminate a cord 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. 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 enclosures, see Type 9 enclosure in ANSI/NEMA ,, and ANSI/UL ,. Enclosures constructed so that dust will not enter under specified test conditions. Informational Note: See ANSI/ISA ,. ANSI/ISA , 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 ISA-RP , ANSI/ISA ,. Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor that may occur within it and of preventing the ignition of 3

7 a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited thereby. Informational Note: For further information, see ANSI/UL ,. 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 ,. ANSI/ISA , Apparatus in which all the circuits are intrinsically safe. 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 ,. ANSI/ISA , 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 , ANSI/ISA , 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 ,. ANSI/ISA , 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. Apparatus intended to be connected to nonincendive field wiring. Informational Note: For further information, see ANSI/ISA ,. ANSI/ISA , 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. Informational Note: For further information, see ANSI/UL ,. 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 ignitable fibers/flyings. Informational Note: For further information, see ANSI/NFPA , 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 ignitable fiber. Informational Note: For further information, see ANSI/NFPA ,. An electrical component or combination of components of simple construction with well defined 4

8 electrical parameters that does not generate more than 1.5 volts, 100 milliamps, and 25 milliwatts, 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: a) Passive components, for example, switches, junction boxes, resistance temperature devices, and simple semiconductor devices such as LEDs b) 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 c) Sources of generated energy, for example, thermocouples and photocells, which do not generate more than 1.5 V, 100 ma milliamps, and 25 mw milliwatts 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. See See See Definitions found in this section are specific to this Article. Apparatus in which the circuits are not necessarily intrinsically safe themselves but that affect the energy in the intrinsically safe circuits and are relied on to maintain intrinsic safety. Associated apparatus may be either of the following: (1) Electrical apparatus that has an alternative-type 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. See the definition in Intrinsically safe circuits in which the possible interconnections have not been evaluated and identified as intrinsically safe. Apparatus in which all the circuits are intrinsically safe. A circuit in which 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: Test conditions are described in ANSI/UL ,. 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. 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 milliamps, and 25 milliwatts, 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: d) Passive components, for example, switches, junction boxes, resistance temperature devices, and simple semiconductor devices such as LEDs e) 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 f) Sources of generated energy, for example, thermocouples and photocells, which do not generate more than 1.5 V, 100 ma, and 25 mw For purposes of this article, the following definitions apply. Definitions found in this section are specific to this Article. A protection technique utilizing stationary gas detectors in industrial establishments. 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 5

9 operated equipment, could potentially become an ignition source in hazardous (classified) locations. 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, ; IEC , and ANSI/UL , -2009, 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. 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 ( )-2008, ; ANSI/ISA ( ), and ANSI/UL , 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 ( ) , ; and ANSI/UL , 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 , ; ANSI/ISA ( )-2009, ; ANSI/ISA ( ), and ANSI/UL , 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). 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, ; and ANSI/UL , 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, ; and ANSI/UL , 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 ( )-2004, ; ANSI/ISA ( ), and IEC ,. Type of protection where electrical equipment, in normal operation, is not capable of igniting a 6

10 surrounding explosive gas atmosphere and a fault capable of causing ignition is not likely to occur. Informational Note: See ANSI/UL , ; and ANSI/ISA ( )-2008, ANSI/ISA ( )-2009, Locations determined to be neither Class I, Division 1; Class I, Division 2; Class I, Zone 0; Zone 1; Zone 2; Class II, Division 1; Class II, Division 2; Class III, Division 1; Class III, Division 2; or any combination thereof. For purposes of this article, the following definitions apply. Definitions found in this section are specific to this Article. Apparatus in which the circuits are not necessarily nonincendive themselves but that affects the energy in nonincendive field wiring circuits and are relied upon to maintain nonincendive energy levels. Associated nonincendive field wiring apparatus may be either 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. Any finely divided solid material that is 420 microns (0.017 in.) or smaller in diameter (material passing a U.S. No. 40 Standard Sieve) and presents a fire or explosion hazard when dispersed and ignited in air. [ 3.3.3] 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 enclosures, see Type 9 enclosure in ANSI/NEMA ,, and ANSI/UL ,. Enclosures constructed so that dust will not enter under specified test conditions. 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 ,. 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: Conditions are described in ANSI/ISA , 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. Apparatus intended to be connected to nonincendive field wiring. Informational Note: Conditions are described in ANSI/ISA , 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 ignitable fibers/flyings. Informational Note: For further information, see ANSI/NFPA , 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 ( )-2006, ANSI/ISA ( )-2009,, ANSI/UL ,, and ANSI/ISA ( )-2011, 7

11 . 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. 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 1: For additional information, see ANSI/ISA ( ) , ANSI/ISA ( )-2006,, and ANSI/ISA ( ) , 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. 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: For additional information, see ANSI/ISA ( ), 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 ( ),. An area where combustible dust or ignitable fibers/flyings are present continuously or for long periods of time in quantities sufficient to be hazardous, as classified by 506.5(B)(1). An area where combustible dust or ignitable fibers/flyings are likely to exist occasionally under normal operation in quantities sufficient to be hazardous, as classified by 506.5(B)(2). An area where combustible dust or ignitable fibers/flyings are not likely to occur under normal operation in quantities sufficient to be hazardous, as classified by 506.5(B)(3). For the purpose of this article, the following definitions shall apply. Definitions found in this section are specific to this Article. An aircraft hangar constructed for the express purpose of spray/coating/dipping applications and provided with dedicated ventilation supply and exhaust. 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. Equipment with electrical components suitable to be moved by a single person without mechanical aids. That portion of a property where liquids are received by tank vessel, pipelines, tank car, or tank vehicle and are stored or blended in bulk for the purpose of distributing such liquids by tank vessel, pipeline, tank car, tank vehicle, portable tank, or container. [ ] Informational Note: For further information, see NFPA ,. For the purpose of this article, the following definitions shall apply. Definitions found in this section are specific to this Article. Normally, locations outside of buildings or 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 shall be the maximum area in the direct path of spray operations. In manual operations, the area limits shall be the maximum area of spray when aimed at 180 degrees to the application surface. 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 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 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. This comment is the product of the task group request by the TCC (reference Proposal 14-3). The 8

12 group was appointed by the panel chair Robert Jones. The task group chair is John Simmons. Panel members are: William Lawrence, Edward Briesch, Jack Jamison, Mark Goodman, Larry Burns, and David Wechsler. The suggested changes resolve the issues surrounding any duplicate or conflicting definitions within the purview of CMP14. The revisions that are made involve relocating any definition used in more than one article ( ) to Definitions specific to any article remain in the article where they are used. Definitions found in Articles that are found in articles other than have been revised by changing the defined term (i.e. Dusttight (as applied to Hazardous (Classified) Locations)). The reorganization of the Article definitions will add clarity to the code. Revise the text found in Sections 500.2, 504.2, 505.2, 506.2, 513.2, and as follows: ***Insert Include for CMP-14-1 Here*** Also, change the edition date of NFPA 496 from 2008 to 2013 wherever NFPA 496 is referenced in Chapter 5. CMP-14 has reorganized the definitions in Article 500 through 516, as directed by the Correlating Committee. CMP-14 notes that the amended text reflects other actions taken by the panel, as reflected elsewhere in the ROC. These include the actions on Comments 14-4, 14-6, 14-34, 14-51, 14-52, 14-54, 14-55, and

13 500.2 Definitions. The definitions found in this section are specific to the Hazardous (Classified) Locations found in For purposes of Articles 500 through 504 and Articles 510 through 516 the following definitions apply. No other section of this Article shall apply to Article 505 or 506 unless it is specifically referenced in that article. Associated Apparatus. Apparatus in which the circuits are not necessarily intrinsically safe themselves but that affect the energy in the intrinsically safe circuits and are relied on to maintain intrinsic safety. Associated Such apparatus may be either 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 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. Associated Nonincendive Field Wiring Apparatus. 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. Associated nonincendive field wiring Such apparatus are one may be either 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. Combustible Dust. Any finely divided solid material that is 420 microns (0.017 in.) or smaller in diameter (material passing a U.S. No. 40 Standard Sieve) and presents a fire or explosion hazard when dispersed and ignited in air. [499, 2008] Combustible Dust. Dust particles that are 500 microns or smaller (material passing a U.S. No. 35 Standard Sieve as defined in ASTM E 11, 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 1226, 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. Combustible Gas Detection System. A protection technique utilizing stationary gas detectors in industrial establishments. Control Drawing. 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. Cord Connector. Cord Connector. A fitting intended to terminate a cord 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. 70_Log 392_Panel Action_ROC_A2013

14 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 dustignitionproof 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. Dusttight (as applied to Hazardous (Classified) Locations). 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. ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. 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 ISA-RP , Recommended Practice for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Zone 2 and Class III, Division 1 and 2 Hazardous (Classified) Locations. ANSI/ISA , Standard for Portable Electronic Products Suitable for Use in Class I and II, Division 2, Zone 2 and Class III, Division 1 and 2 Hazardous (Classified) Locations. Explosionproof Equipment (as applied to Hazardous (Classified) Locations). Equipment enclosed in a case that is capable of withstanding an explosion of a specified gas or vapor that may occur within it and of preventing the ignition of a specified gas or vapor surrounding the enclosure by sparks, flashes, or explosion of the gas or vapor within, and that operates at such an external temperature that a surrounding flammable atmosphere will not be ignited thereby. Informational Note: For further information, see ANSI/UL , Explosion-Proof and Dust- Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations. Hermetically Sealed. 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, Division 1 and 2 Hazardous (Classified) Locations. ANSI/ISA , Nonincendive Electrical Equipment for Use in Class I and II, Division 2, and Class III, Divisions 1 and 2 Hazardous (Classified) Locations. Intrinsically Safe Apparatus. Apparatus in which all the circuits are intrinsically safe. 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. 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. 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. 70_Log 392_Panel Action_ROC_A2013

15 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. 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 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. 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. 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. 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. Informational Note: For further information, see ANSI/UL , Industrial Control Equipment for Use in Hazardous (Classified) Locations. 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 ignitable fibers/flyings. Informational Note: For further information, see ANSI/NFPA , Standard for Purged and Pressurized Enclosures for Electrical Equipment. Purged and Pressurized. 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 ignitable fiber. Informational Note: For further information, see ANSI/NFPA , Purged and Pressurized Enclosures for Electrical Equipment. Simple Apparatus. 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 milliamps, and 25 milliwatts, 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: a) Passive components, for example, switches, junction boxes, resistance temperature devices, and simple semiconductor devices such as LEDs 70_Log 392_Panel Action_ROC_A2013