National Fire Protection Association 1 Batterymarch Park, Quincy, MA 02169-7471 Phone: 617-770-3000 Fax: 617-770-0700 www.nfpa.org M E M O R A N D U M TO: NEC Code-Making Panel 12 FROM: Kimberly Shea DATE: December 5, 2012 SUBJECT: NFPA 70 CMP-12 ROC TC Letter Ballot () The ROC letter ballot for NFPA 70 CMP-12 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, 2013. Ballots may be returned via e-mail to panel12@nfpa.org or via fax to 617-984-7070. You may also mail your ballot to the attention of Kim Shea at NFPA, 1 Batterymarch Park, Quincy, MA 02169. The return of ballots is required by the Regulations Governing Committee Projects. Attachments: Comments Letter Ballot
Sort Listing Comm # Log# Seq# Comm. Action Tech. Comm. Section 12-1 165 1 A NEC-P12 - ( 610.31 ): 12-2 1031 2 R NEC-P12 - ( 620.2 ): 12-3 611 3 R NEC-P12 - ( 620.2.Signal Equipment ): 12-4 604 4 R NEC-P12 - ( 620.2 and 2, Informational Note 1 ): 12-5 748 5 A NEC-P12 - ( 620.3(A) and (C) ): 12-6 749 6 A NEC-P12 - ( 620.4 ): 12-7 166 7 A NEC-P12 - ( 620.5(B) ): 12-8 348 8 APR NEC-P12 - ( 620.5(B) ): 12-9 612 9 APR NEC-P12 - ( 620.13 ): 12-10 349 10 A NEC-P12 - ( Table 620.14 ): 12-11 167 11 A NEC-P12 - ( 620.14, Informational Note ): 12-12 168 12 A NEC-P12 - ( 620.21 Exception (New) ): 12-13 347 13 A NEC-P12 - ( 620.21 Exception (New) ): 12-14 613 14 R NEC-P12 - ( 620.21 Exception ): 12-15 750 15 A NEC-P12 - ( 620.36 ): 12-16 169 16 A NEC-P12 - ( 620.51(C)(1) ): 12-17 350 17 A NEC-P12 - ( 620.51(C)(1) ): 12-18 1235 18 R NEC-P12 - ( 620.54 ): 12-19 796 19 APR NEC-P12 - ( 625.1, Informational Note 2 ): 12-20 776 20 APR NEC-P12 - ( 625.2.Cable Management System ): 12-21 480 21 R NEC-P12 - ( 625.2.Electric Vehicle and 625.3 (New) ): 12-22 481 22 R NEC-P12 - ( 625.2.Electric Vehicle Connector and 625.3 ): 12-23 774 23 A NEC-P12 - ( 625.2.Electric Vehicle Connector ): 12-24 482 24 R NEC-P12 - ( 625.2.Electric Vehicle Inlet and 625.3 (New) ): 12-25 1375 25 APR NEC-P12 - ( 625.2.Fastened in Place (New) ): 12-26 775 26 APR NEC-P12 - ( 625.2.Power Supply Cord ): 12-27 797 27 APR NEC-P12 - ( 625.10(A) and Exception (New) ): 12-27a CC1202 27 a A NEC-P12 - ( 625.14 ): 12-28 515 28 R NEC-P12 - ( 625.14 ): 12-29 798 29 A NEC-P12 - ( 625.15(B) ): 12-30 359 30 A NEC-P12 - ( 625.17(A)(1) Exception ): 12-31 363 31 APR NEC-P12 - ( 625.17(B)(1) ): 12-31a CC1201 31 a A NEC-P12 - ( 625.17(B)(2) ): 12-32 360 32 A NEC-P12 - ( 625.17(B)(2) Exception ): 12-33 361 33 APR NEC-P12 - ( 625.17(C)(2) ): 12-34 170 34 A NEC-P12 - ( 625.18 ): 12-35 516 35 R NEC-P12 - ( 625.21 ): 12-36 783 36 R NEC-P12 - ( 625.22 ): 12-37 799 37 R NEC-P12 - ( 625.22 ): 12-38 1087 38 R NEC-P12 - ( 625.22 ): Cycle Page 1
Sort Listing Comm # Log# Seq# Comm. Action Tech. Comm. Section 12-39 362 39 APR NEC-P12 - ( 625.44 ): 12-40 823 40 R NEC-P12 - ( 625.44 ): 12-41 777 41 APA NEC-P12 - ( 625.44(A) ): 12-42 778 42 APP NEC-P12 - ( 625.44(B)(2) ): 12-43 779 43 APR NEC-P12 - ( 625.44(B)(2) ): 12-43a CC1200 43 a A NEC-P12 - ( 625.44(B)(3), 625.17(C)(1), and 625.17(C)(2) ): 12-44 364 44 R NEC-P12 - ( 625.44(C) ): 12-45 785 45 R NEC-P12 - ( 625.48 ): 12-46 780 46 A NEC-P12 - ( 625.52 ): 12-47 781 47 APR NEC-P12 - ( 625.52 ): 12-48 782 48 APR NEC-P12 - ( 625.52 ): 12-48a CC1203 48 a A NEC-P12 - ( 626.2 ): 12-49 483 49 R NEC-P12 - ( 626.2.Cord Connector and 626.4 (New) ): 12-50 484 50 R NEC-P12 - ( 626.2.Truck Flanged Surface Inlet ): 12-51 1376 51 A NEC-P12 - ( 626.5 ): 12-52 784 52 A NEC-P12 - ( 626.24(B)(1) ): 12-53 614 53 APR NEC-P12 - ( 630.13 ): 12-54 575 54 A NEC-P12 - ( 640.9, Informational Note 2 ): 12-55 171 55 A NEC-P12 - ( 645 ): 12-56 389 56 R NEC-P12 - ( 645 ): 12-56a CC1204 56 a A NEC-P12 - ( 645.2 ): 12-57 576 57 A NEC-P12 - ( 645.2, Informational Note ): 12-58 312 58 APR NEC-P12 - ( 645.3(B) and 645.32 (New) ): 12-59 390 59 APR NEC-P12 - ( 645.4 ): 12-60 1458 60 R NEC-P12 - ( 645.4(2) Exception ): 12-61 1459 61 R NEC-P12 - ( 645.4(8) ): 12-62 1570 62 A NEC-P12 - ( 645.5(10) ): 12-63 577 63 A NEC-P12 - ( 645.5(B) ): 12-64 172 64 A NEC-P12 - ( 645.5(E)(3) ): 12-65 1446 65 R NEC-P12 - ( 645.10(B) ): 12-66 173 66 A NEC-P12 - ( 645.10(B)(5) ): 12-67 391 67 R NEC-P12 - ( 645.10(B)(5) ): 12-68 388 68 APR NEC-P12 - ( 645.15 ): 12-69 174 69 A NEC-P12 - ( 646X (New) ): 12-70 1379 70 R NEC-P12 - ( 646 ): 12-71 1467 71 APR NEC-P12 - ( 646 (New) ): 12-72 485 72 APR NEC-P12 - ( 646.2.Modular Data Center ): 12-73 605 73 R NEC-P12 - ( 646.2.Premises Transformer and Service ): 12-74 606 74 APP NEC-P12 - ( 646.8 ): 12-75 607 75 APR NEC-P12 - ( 646.9(A) ): Cycle Page 2
Sort Listing Comm # Log# Seq# Comm. Action Tech. Comm. Section 12-76 608 76 APR NEC-P12 - ( 646.11 ): 12-77 1525 77 A NEC-P12 - ( 646.19 ): 12-78 609 78 APR NEC-P12 - ( 646.19 Exception ): 12-79 610 79 R NEC-P12 - ( 646.20 ): 12-80 1526 80 A NEC-P12 - ( 646.21 ): 12-81 384 81 APR NEC-P12 - ( 646.26 Exception ): 12-82 426 82 APR NEC-P12 - ( 646.26(C) (New) ): 12-83 425 83 APR NEC-P12 - ( 646.26(D) (New) ): 12-84 1457 84 R NEC-P12 - ( 647 ): 12-85 751 85 A NEC-P12 - ( 660.4(C) ): 12-86 486 86 R NEC-P12 - ( 665.2.Converting Device and 665.3 (New) ): 12-87 616 87 A NEC-P12 - ( 665.2.Converting Device ): 12-88 175 88 A NEC-P12 - ( 665.2.Heating Equipment Applicator ): 12-89 176 89 A NEC-P12 - ( 665.23 ): 12-90 487 90 R NEC-P12 - ( 668.2.Cell Line Attachments and Auxiliary ): 12-91 752 91 A NEC-P12 - ( 668.21(A) ): 12-92 753 92 A NEC-P12 - ( 670.4 ): 12-93 1584 93 APR NEC-P12 - ( 670.4(A), Informational Note ): Cycle Page 3
12-1 Log #165 NEC-P12 Technical Correlating Committee on National Electrical Code, 12-10 The Correlating Committee directs that the panel clarify the panel action with regard to the specific text that is to be added and deleted in 610.31. This is a direction from the National Electrical Code Technical Correlating Committee in accordance with 3.4.2 and 3.4.3 of the Regulations Governing Committee Projects. 610.31 Runway Conductor Disconnecting Means. A disconnecting means that has a continuous ampere rating not less than that calculated in 610.14(E) and (F) shall be provided between the runway contact conductors and the power supply. The disconnecting means shall comply with 430.109. This disconnecting means shall be as follows: (1) Readily accessible and operable from the ground or floor level (2) Lockable open in accordance with 110.25 (3) Open all ungrounded conductors simultaneously (4) Placed within view of the runway contact conductors Exception: The runway conductor disconnecting means for electrolytic cell lines shall be permitted to be placed out of view of the runway contact conductors where either of the following conditions are met: (a) Where a location in view of the contact conductors is impracticable or introduces additional or increased hazards to persons or property (b) In industrial installations, with written safety procedures, where conditions of maintenance and supervision ensure that only qualified persons service the equipment CMP-12 accepts the direction of the Correlating Committee to clarify the panel action with regard to the specific text that is to be added and deleted in 610.31. 12-2 Log #1031 NEC-P12 Mike Holt, Mike Hold Enterprises 12-15a Reject the addition of the second informational note. This informational note is unnecessary. Do we really need a note that tells me that a different note is a note? When does it end? Should we add this note in front of all of the informational notes in the Code? Informational Note No. 2 is existing and is only being relocated. It is important to recognize that the figure is for information only and not part of the requirements. 1
12-3 Log #611 NEC-P12 James F. Williams, Fairmont, WV 12-15a Includes audible and visual equipment such as chimes, gongs, lights, and displays, and voice output that convey information to the user. A lot of modern (and not so modern) elevator equipment uses recorded or generated speech to alert passengers. The text for this definition should be coordinated with the requirements of ASME A17.1. 12-4 Log #604 NEC-P12 James F. Williams, Fairmont, WV 12-15a Informational Note No. 1: The motor controller, motion controller, and operation controller are located in a single enclosure or a combination of enclosures. Informational Note No. 2: Informational Note Figure 620.2 is for information only. If the reader doesn't understand that is informational only, then how does this Informational Note help? See panel action and statement on Comment 12-2. 2
12-5 Log #748 NEC-P12 James T. Dollard, Jr., IBEW Local 98 12-17 Continue to Accept. This comment is submitted on behalf of the high voltage task to provide additional substantiation as directed by the Correlating Committee. The High Voltage Task Group (HVTG) was charged with developing recommendations throughout the NEC to provide the code user with prescriptive requirements for high voltage installations. The task group charge was to identify holes in the code with respect to installations operating at over 600-volts and address them with recommended requirements to allow for uniform installation and enforcement. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are currently being installed at DC voltages over 600V up to and including 1000V, 1200V, 1500V, and 2000V DC. These DC systems are expanding and have become a more integral part of many structures. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are employed regularly in, and on all types of structures from dwellings units, to large retail and high rise construction. The first direction that the HVTG took was to simply suggest revisions in Chapter 6 for Special Equipment. It is extremely important to fully understand the outline form of the NEC. Section 90.3 mandates that Chapters 1 through 4 apply generally and Chapters 5, 6 and 7 are special and serve only to modify or supplement the rules in Chapters 1 through 4. The HVTG quickly realized that it was not feasible to address all of the installation requirements in Chapter 6. The work needs to be done throughout the NEC. The special systems in Chapter 6 are built primarily upon Chapters 1 through 4 with the Chapter 6 requirements providing only modifications or supplemental requirements. A quick review of the UL White-book for electrical products will uncover that UL has many products that are utilized in these systems rated at and above 600-volts including but not limited to, 600Vdc terminal blocks, 1000Vdc PV switches, 1500Vdc PV fuses, and 2000V PV wiring. Product listings provide permitted uses and restrictions on a given product. The NEC must recognize those products through installation requirements. Electrical safety in the home, workplace and in all venues depends upon installation requirements to ensure that all persons and property are not exposed to the hazards of electricity. The success of this code hinges on three things (1) product standards, (2) installation requirements and (3) enforcement. The NEC needs to recognize emerging technologies that are operating at over 600-volts. Everyone needs to play a role in this transition. The present NEC requirements would literally require that a PV system operating at 750-volts DC utilize a disconnecting means rated at 5 kv. The manufacturers, research and testing laboratories and the NEC must work together to develop installation requirements and product standards to support these emerging technologies. Moving the NEC threshold from 600 volts to 1000 volts will not, by itself, allow the immediate installation of systems at 1000-volts. Equipment must first be tested and found acceptable for use at the higher voltage(s). The testing and listing of equipment will not, by itself, allow for the installation of 1000 volt-systems. The NEC must include prescriptive requirements to permit the installation of these 1000-volt systems. It will take both tested/listed equipment and an installation code to meet the needs of these emerging technologies that society demands. The installation code should be the NEC. Moving the NEC to 1000 volts is just the beginning. The desire to keep increasing efficiencies will continue to drive up the system voltages. We are beginning to see 1200, 1500, and 2000-volt systems. 2500 volts cannot be far down the road. Most equipment standards are still at 600 volts and will need to be upgraded also. If the NEC does not adequately address systems over 600 volts, some other standard will. If we want to control the future safety of installations over 600 volts we need to address these issues today. 3
12-6 Log #749 NEC-P12 James T. Dollard, Jr., IBEW Local 98 12-18 Continue to Accept in Principle. This comment is submitted on behalf of the high voltage task to provide additional substantiation as directed by the Correlating Committee. The High Voltage Task Group (HVTG) was charged with developing recommendations throughout the NEC to provide the code user with prescriptive requirements for high voltage installations. The task group charge was to identify holes in the code with respect to installations operating at over 600-volts and address them with recommended requirements to allow for uniform installation and enforcement. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are currently being installed at DC voltages over 600V up to and including 1000V, 1200V, 1500V, and 2000V DC. These DC systems are expanding and have become a more integral part of many structures. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are employed regularly in, and on all types of structures from dwellings units, to large retail and high rise construction. The first direction that the HVTG took was to simply suggest revisions in Chapter 6 for Special Equipment. It is extremely important to fully understand the outline form of the NEC. Section 90.3 mandates that Chapters 1 through 4 apply generally and Chapters 5, 6 and 7 are special and serve only to modify or supplement the rules in Chapters 1 through 4. The HVTG quickly realized that it was not feasible to address all of the installation requirements in Chapter 6. The work needs to be done throughout the NEC. The special systems in Chapter 6 are built primarily upon Chapters 1 through 4 with the Chapter 6 requirements providing only modifications or supplemental requirements. A quick review of the UL White-book for electrical products will uncover that UL has many products that are utilized in these systems rated at and above 600-volts including but not limited to, 600Vdc terminal blocks, 1000Vdc PV switches, 1500Vdc PV fuses, and 2000V PV wiring. Product listings provide permitted uses and restrictions on a given product. The NEC must recognize those products through installation requirements. Electrical safety in the home, workplace and in all venues depends upon installation requirements to ensure that all persons and property are not exposed to the hazards of electricity. The success of this code hinges on three things (1) product standards, (2) installation requirements and (3) enforcement. The NEC needs to recognize emerging technologies that are operating at over 600-volts. Everyone needs to play a role in this transition. The present NEC requirements would literally require that a PV system operating at 750-volts DC utilize a disconnecting means rated at 5 kv. The manufacturers, research and testing laboratories and the NEC must work together to develop installation requirements and product standards to support these emerging technologies. Moving the NEC threshold from 600 volts to 1000 volts will not, by itself, allow the immediate installation of systems at 1000-volts. Equipment must first be tested and found acceptable for use at the higher voltage(s). The testing and listing of equipment will not, by itself, allow for the installation of 1000 volt-systems. The NEC must include prescriptive requirements to permit the installation of these 1000-volt systems. It will take both tested/listed equipment and an installation code to meet the needs of these emerging technologies that society demands. The installation code should be the NEC. Moving the NEC to 1000 volts is just the beginning. The desire to keep increasing efficiencies will continue to drive up the system voltages. We are beginning to see 1200, 1500, and 2000-volt systems. 2500 volts cannot be far down the road. Most equipment standards are still at 600 volts and will need to be upgraded also. If the NEC does not adequately address systems over 600 volts, some other standard will. If we want to control the future safety of installations over 600 volts we need to address these issues today. 4
12-7 Log #166 NEC-P12 Technical Correlating Committee on National Electrical Code, 12-18a The Correlating Committee directs that 620.5 be rewritten in mandatory language to comply with the NEC Style Manual. In addition, the text as proposed conflicts with the Article 100 definition of "Exposed Live Parts" since exposed live parts are not suitably guarded or insulated. This is a direction from the National Electrical Code Technical Correlating Committee in accordance with 3.4.2 and 3.4.3 of the Regulations Governing Committee Projects. CMP-12 accepts the direction of the Correlating Committee to review 620.5(B). See panel action and statement on Comment 12-8 where "exposed" is deleted and 620.5 is rewritten to comply with the NEC Style Manual. 5
12-8 Log #348 NEC-P12 Andy Juhasz, Kone, Inc. 12-18a 620.5 Working Clearances. Working space shall be provided about controllers, disconnecting means, and other electrical equipemnt. The mimimum working space shall be not less thant hat specified in 110.26(A). The clearance requirements of 110.26(A) shall be waived Wwhere conditions of maintenance and supervision ensure that only qualified persons examine, adjust, service and maintain the equipment, the clearance requirements of 110.26(A) shall be waived as permitted in 620.5(A) through (D) and: (A) Flexible Connections to Equipment. Electrical equipment in (A)(1) through (A)(4) shall be permitted to be is provided with flexible leads to all external connections so that it can be repositioned to meet the clear working space requirements of 110.26(A): (1) Controllers and disconnecting means for dumbwaiters, escalators, moving walks, platform lifts and stairway chairlifts installed in the same space witht he driving machine (23) Controllers and disconnecting means for elevators installed in the hoistway or on the care (3) Controllers for door operators (4) Other electrical equipment installed in the hoistway or on the car; or (B) Guards. Live parts of the electrical equipment are suitably guarded, isolated, or insulated, and the equipment can be examined, adjusted, serviced, or maintained while energized without removal of this protection. or Informational Note: See definition of Exposed in Article 100 (C) Examination, Adjusting, and Servicing. Electrical equipment is not required to be examined, adjusted, serviced, or maintained while energized. or (D) Low Voltage. Uninsulated parts are at a voltage not greater than 30 volts rms, 42 volts peak, or 60 volts dc. 620.5 has been rewritten in mandatory language to comply with the NEC Style Manual and has not added the word "exposed" so as not to create any conflicts with the definitions in Article 100. This is being submitted on behalf of Andy Juhasz and Tim Croushore to address the comments of the TCC. Working space shall be provided about controllers, disconnecting means, and other electrical equipment in accordance with 110.26(A). Where conditions of maintenance and supervision ensure that only qualified persons examine, adjust, service, and maintain the equipment, the clearance requirements of 110.26(A) shall be waived where any of the following conditions exist: Electrical equipment in (A)(1) through (A)(4) is provided with flexible leads to all external connections so that it can be repositioned to meet the clear working space requirements of 110.26(A): (1) Controllers and disconnecting means for dumbwaiters, escalators, moving walks, platform lifts and stairway chairlifts installed in the same space with the driving machine (2) Controllers and disconnecting means for elevators installed in the hoistway or on the car (3) Controllers for door operators (4) Other electrical equipment installed in the hoistway or on the car Live parts of the electrical equipment are suitably guarded, isolated, or insulated, and the equipment can be examined, adjusted, serviced, or maintained while energized without removal of this protection Electrical equipment is not required to be examined, adjusted, serviced, or maintained while energized Uninsulated parts are at a voltage not greater than 30 volts rms, 42 volts peak, or 60 volts dc CMP-12 clarifies the submitter's text and removes the informational note. The titles to A, B, C and D are retained. 6
12-9 Log #612 NEC-P12 James F. Williams, Fairmont, WV 12-19a Conductors shall have an ampacity in accordance with 620.13(A) through (D). With generator field control, the conductor ampacity shall be based on the nameplate current rating of the driving motor of the motor-generator set that supplies power to the elevator motor. Informational Note No. 1: The heating of conductors depends on root-mean-square current values, which, with generator field control, are reflected by the nameplate current rating of the motor-generator driving motor rather than by the rating of the elevator motor, which represents actual but short-time and intermittent full-load current values. Conductors supplying a single motor shall have an ampacity not less than the percentage of motor nameplate current determined from 430.22(A) and (E). Informational Note: Some elevator motor currents, or those of similar functions, exceed the nameplate value, but because they are inherently intermittent duty and the heating of the motor and conductors is dependent on the root-mean-square (rms) current value, conductors are sized for duty cycle service as shown in Table 430.22(E). Conductors supplying a single motor controller shall have an ampacity not less than the motor controller nameplate current rating, plus all other connected loads. Motor controller nameplate current rating shall be permitted to be derived based on the rms value of the motor current using an intermittent duty cycle and other control system loads, if present. Conductors shall have an ampacity in accordance with 620.13(A) through (D). With generator field control, the conductor ampacity shall be based on the nameplate current rating of the driving motor of the motor-generator set that supplies power to the elevator motor. Informational Note No. 1: The heating of conductors depends on root-mean-square rms current values, which, with generator field control, are reflected by the nameplate current rating of the motor-generator driving motor rather than by the rating of the elevator motor, which represents actual but short-time and intermittent full-load current values. Conductors supplying a single motor shall have an ampacity not less than the percentage of motor nameplate current determined from 430.22(A) and (E). Informational Note: Some elevator motor currents, or those of similar functions, exceed the nameplate value, but because they are inherently intermittent duty and the heating of the motor and conductors is dependent on the root-mean-square (rms) current value, conductors are sized for duty cycle service as shown in Table 430.22(E). Conductors supplying a single motor controller shall have an ampacity not less than the motor controller nameplate current rating, plus all other connected loads. Motor controller nameplate current rating shall be permitted to be derived based on the rms value of the motor current using an intermittent duty cycle and other control system loads, if present 'rms' is never referenced in the rest of the text in connection with current, only with voltage. 'rms' is not really related to duty cycle as suggested in (A). OR The dominate form of reference to root-mean-square is rms in the rest of the text. Revise the informational note to read as follows: Informational Note: Some elevator motor currents, or those motor currents of similar function, exceed the motor nameplate value. Heating of the motor and conductors is dependent of the root-mean square (rms) current value and the length of operation time. Because this motor application is inherently intermittent duty, conductors are sized for duty cycle service as shown in Table 430.22(E). CMP-12 understands the issue of the submitter with regard to the informational note after 620.13(A). CMP-12 revises the text of the informational note. 7
12-10 Log #349 NEC-P12 Andy Juhasz, Kone, Inc. 12-19b Add an asterisk in the second column title as follows "Demand Factor*" and revise the Information Note as follows: Informational Note: *Demand factors are based on 50 percent duty cycle (i.e., half time on and half time off) The note to Table 620.14 has been clarified as shown in the proposal. This is being submitted on behalf of Andy Juhasz and Tim Croushore to address the comments of the TCC. 12-11 Log #167 NEC-P12 Technical Correlating Committee on National Electrical Code, 12-19b The Correlating Committee directs the panel clarify the note based upon 2.3.1 and 3.1.1 of the NEC Style Manual with respect to mandatory text. This is a direction from the National Electrical Code Technical Correlating Committee in accordance with 3.4.2 and 3.4.3 of the Regulations Governing Committee Projects. CMP-12 accepts the direction of the Correlating Committee to clarify the note. See panel action on Comment 12-10. 12-12 Log #168 NEC-P12 Technical Correlating Committee on National Electrical Code, 12-28 The Correlating Committee directs that the panel write the Exception in a complete sentence to comply with the last sentence in 3.1.4.1 of the NEC Style Manual. This is a direction from the National Electrical Code Technical Correlating Committee in accordance with 3.4.2 and 3.4.3 of the Regulations Governing Committee Projects. CMP-12 accepts the direction of the Correlating Committee to rewrite the exception in a complete sentence. See action on Comment 12-13. 8
12-13 Log #347 NEC-P12 Andy Juhasz, Kone, Inc. 12-28 620.21 Wiring Methods. Conductors and optical fibers located in hoistways, in escalator and moving walk wellways, in platform lifts, stairway chairlift runways, machinery spaces, control spaces, in or on cars, in machine rooms and control rooms, not including the traveling cables connecting the car or counterweight and hoistway wiring, shall be installed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, rigid nonmetallic conduit, or wireways, or shall be Type MC, MI, or AC cable unless otherwise permitted in 620.21(A) through (C). Exception: Cords and cables of Llisted cord and plug connected equipment shall not be required to be installed in a raceway. (A) Elevators. (1) Hoistways. (a) Cables used in Class 2 power-limited circuits shall be permitted to be installed between risers and signal equipment and operating devices, provided the cables are supported and protected...". The exception to 620.21 has been written as a complete sentence. This is being submitted on behalf of Andy Juhasz and Tim Croushore to address the comments of the TCC. 12-14 Log #613 NEC-P12 James F. Williams, Fairmont, WV 12-28 Conductors and optical fibers located in hoistways, in escalator and moving walk wellways, in platform lifts, stairway chairlift runways, machinery spaces, control spaces, in or on cars, in machine rooms and control rooms, not including the traveling cables connecting the car or counterweight and hoistway wiring, shall be installed in rigid metal conduit, intermediate metal conduit, electrical metallic tubing, rigid nonmetallic conduit, or wireways, or shall be Type MC, MI, or AC cable unless otherwise permitted in 620.21(A) through (C). The new exception is the size of a barn door. It would allow microwaves, curling irons, and blenders in elevator shafts with standard cordage. It is completely out of line with the almost 3 pages of requirements for wiring in 620.21. It is not a matter of whether the equipment can be placed in these spaces. It is a matter of whether the conductors must be placed in a raceway, which has been misinterpreted. ASME A17.1 does not permit microwaves, curling irons, and blenders in elevator spaces. See action on Comment 12-13 which writes the exception in a complete sentence. 9
12-15 Log #750 NEC-P12 James T. Dollard, Jr., IBEW Local 98 12-32 Continue to Accept. This comment is submitted on behalf of the high voltage task to provide additional substantiation as directed by the Correlating Committee. The High Voltage Task Group (HVTG) was charged with developing recommendations throughout the NEC to provide the code user with prescriptive requirements for high voltage installations. The task group charge was to identify holes in the code with respect to installations operating at over 600-volts and address them with recommended requirements to allow for uniform installation and enforcement. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are currently being installed at DC voltages over 600V up to and including 1000V, 1200V, 1500V, and 2000V DC. These DC systems are expanding and have become a more integral part of many structures. Small Wind Electric Systems and Solar Photovoltaic (PV) Systems are employed regularly in, and on all types of structures from dwellings units, to large retail and high rise construction. The first direction that the HVTG took was to simply suggest revisions in Chapter 6 for Special Equipment. It is extremely important to fully understand the outline form of the NEC. Section 90.3 mandates that Chapters 1 through 4 apply generally and Chapters 5, 6 and 7 are special and serve only to modify or supplement the rules in Chapters 1 through 4. The HVTG quickly realized that it was not feasible to address all of the installation requirements in Chapter 6. The work needs to be done throughout the NEC. The special systems in Chapter 6 are built primarily upon Chapters 1 through 4 with the Chapter 6 requirements providing only modifications or supplemental requirements. A quick review of the UL White-book for electrical products will uncover that UL has many products that are utilized in these systems rated at and above 600-volts including but not limited to, 600Vdc terminal blocks, 1000Vdc PV switches, 1500Vdc PV fuses, and 2000V PV wiring. Product listings provide permitted uses and restrictions on a given product. The NEC must recognize those products through installation requirements. Electrical safety in the home, workplace and in all venues depends upon installation requirements to ensure that all persons and property are not exposed to the hazards of electricity. The success of this code hinges on three things (1) product standards, (2) installation requirements and (3) enforcement. The NEC needs to recognize emerging technologies that are operating at over 600-volts. Everyone needs to play a role in this transition. The present NEC requirements would literally require that a PV system operating at 750-volts DC utilize a disconnecting means rated at 5 kv. The manufacturers, research and testing laboratories and the NEC must work together to develop installation requirements and product standards to support these emerging technologies. Moving the NEC threshold from 600 volts to 1000 volts will not, by itself, allow the immediate installation of systems at 1000-volts. Equipment must first be tested and found acceptable for use at the higher voltage(s). The testing and listing of equipment will not, by itself, allow for the installation of 1000 volt-systems. The NEC must include prescriptive requirements to permit the installation of these 1000-volt systems. It will take both tested/listed equipment and an installation code to meet the needs of these emerging technologies that society demands. The installation code should be the NEC. Moving the NEC to 1000 volts is just the beginning. The desire to keep increasing efficiencies will continue to drive up the system voltages. We are beginning to see 1200, 1500, and 2000-volt systems. 2500 volts cannot be far down the road. Most equipment standards are still at 600 volts and will need to be upgraded also. If the NEC does not adequately address systems over 600 volts, some other standard will. If we want to control the future safety of installations over 600 volts we need to address these issues today. 10
12-16 Log #169 NEC-P12 Technical Correlating Committee on National Electrical Code, 12-37 The Correlating Committee directs that this proposal be reconsidered and correlated with the action taken on Proposal 12-39. This is a direction from the National Electrical Code Technical Correlating Committee in accordance with 3.4.2 and 3.4.3 of the Regulations Governing Committee Projects. CMP-12 accepts the direction of the Correlating Committee to reconsider and correlate with the action taken on Proposal 12-39. See panel action on Comment 12-17. 12-17 Log #350 NEC-P12 Andy Juhasz, Kone, Inc. 12-37 (1) On Elevators Without Generator Field Control. On elevators without generator field control, the disconnecting means shall be located within sight of the motor field controller. Where the motor controller is located in the elevator hoistway, the disconnecting means required by 620.51(A) shall be located in a machinery space, machine room, control space or control room outside the hoistway; and an additional, fused or non-fused externally operable motor circuit switch that is lockable open in accordance with 110.25 capable of being locked in the open position to disconnect all ungrounded main power-supply conductors shall be located within sight of the motor controller. The additional switch shall be a listed device and shall comply with 620.91(C). The provision for locking or adding a lock to the disconnecting means, required by this section, shall be installed on or at the switch or circuit breaker used as the disconnecting means and shall remain in place with or without the lock installed. Portable means for adding a lock to the switch or circuit breaker shall not be permitted. Driving machines or motion and operation controllers not within sight of the disconnecting means shall be provided with a manually operated switch installed in the control circuit to prevent starting. The manually operated switch(es) shall be installed adjacent to this equipment. Where the driving machine of an electric elevator or the hydraulic machine of a hydraulic elevator is located in a remote machine room or remote machinery space, a single means for disconnecting all ungrounded main power supply conductors shall be provided and be lockable open in accordance with 110.25. capable of being locked in the open position. Proposal 12-37 has been correlated with proposal 12-39 to show the complete final wording. This is being submitted on behalf of Andy Juhasz and Tim Croushore to address the comments of the TCC. 11
12-18 Log #1235 NEC-P12 Richard E. Loyd, Sun Lakes, AZ 2-46 Reconsider and Accept this proposal or accept in part. accept The disconnecting means shall be an enclosed externally operable fused motor circuit switch or circuit breaker capable of being locked in the open position and shall be located in the machine room or control room for that elevator car. While attending the Southern section IAEI meeting this change was explained and it seems the proposed text from the submitter is much clearer than the wording revised by the committee. CMP-12 notes that the submitter is referring to Proposal 12-46. CMP-12 reaffirms its position to accept the localization of lockable disconnecting means requirements to a new 110.25. The text is clear as written and is harmonized with like requirements in 620.51(A), 620.51(C)(1), 620.51(C)(2), 620.53, 620.54 and 620.55. 12-19 Log #796 NEC-P12 Joseph M. Bablo, UL LLC 12-52 Informational Note No. 2: UL 2594-20112012,, is a safety standard for Electric Vehicle Supply Equipment. UL 2202-2009,, is a safety standard for Electric Vehicle Charging Equipment. The referenced date in the proposal would not be correct. The actual date for the standard would be 2012. Informational Note No. 2: UL 2594-20112013,, is a safety standard for Electric Vehicle Supply Equipment. UL 2202-2009,, is a safety standard for electric vehicle charging equipment. CMP-12 requests that the Correlating Committee verify that the standard has been published. As information, UL 2594-2012 is not yet published and is proposed to have a date of 2013. 12
12-20 Log #776 NEC-P12 Gregory C. Nieminski, Gregory C. Nieminski, LLC 12-52 An apparatus designed to control and organize unused lengths of cable or cord at electric vehicle charging sites. The term "cable management system has been used in the new Article 62.5.17(C) but is not defined. The term is presently used and defined in Article 626. It is proposed that the same definition be added to 625.2 or, alternatively, that the term be defined commonly in Article 100. This comment is submitted on behalf of the EPRI Electric Transportation Infrastructure Working Council's NEC Task Force. An apparatus designed to control and organize unused lengths of output cable to the electric vehicle. CMP-12 edits the submitter's definition to add clarity. As information to the Correlating Committee, CMP-12 considered and dismissed a single definition in Article 100. A similar, but not identical, definition is placed in Article 626 for that equipment. 13
12-21 Log #480 NEC-P12 Marcelo M. Hirschler, GBH International 12-54 An automotive-type vehicle for on-road use, such as passenger automobiles, buses, trucks, vans, neighborhood electric vehicles, electric motorcycles, and the like, primarily powered by an electric motor that draws current from a rechargeable storage battery, fuel cell, photovoltaic array, or other source of electric current. Plug-in hybrid electric vehicles (PHEV) are considered electric vehicles. For the purpose of this article, off-road, self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included. Plug-in hybrid electric vehicles (PHEV) shall be considered electric vehicles. For the purpose of this article, off-road, self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included. Both the electric vehicle connector and the electric vehicle inlet shall be considered a part of the electric vehicle coupler. For the purposes of this Code, the electric vehicle inlet shall be considered to be part of the of the electric vehicle and not part of the electric vehicle supply equipment. I accept the concept that NEC definitions are not required to be in single sentences. However this definition contains a list of examples and such examples are not usually contained in definitions. Moreover, the information included should really be considered a requirement. If the CMP agrees that this is a requirement it should be placed somewhere else in Article 625, and a new section 625.3, on general requirements, is the perfect location, since NEC definitions shall not contain requirements. Moreover, the NEC manual of style does not permit the definition to contain the defined term and the second sentence of the definition contains the term electric vehicle. The sections in 625.3.3 and 625.3.4 are associated with the comments to proposals 12-55 and 12.56. The NEC Manual of Style states as follows: Definitions. Definitions shall be in alphabetical order and shall not contain the term that is being defined. Definitions shall not contain requirements or recommendations. CMP-12 rejects changing the definition. The current definition does comply with the NEC Style Manual because it just states what an electrical vehicle is and what it is not. In addition, the submitter's text does not add clarity to the article. 14
12-22 Log #481 NEC-P12 Marcelo M. Hirschler, GBH International 12-55 A device that, by insertion into an electric vehicle inlet, establishes an electrical connection to the electric vehicle for the purpose of power transfer and information exchange. This device is part of the electric vehicle coupler. Plug-in hybrid electric vehicles (PHEV) shall be considered electric vehicles. For the purpose of this article, off-road, self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included. Both the electric vehicle connector and the electric vehicle inlet shall be considered a part of the electric vehicle coupler. For the purposes of this Code, the electric vehicle inlet shall be considered to be part of the of the electric vehicle and not part of the electric vehicle supply equipment. I accept the concept that NEC definitions are not required to be in single sentences. However this definition contains a requirement. If the CMP agrees that this is a requirement it should be placed somewhere else in Article 625, and a new section 625.3, on general requirements, is the perfect location, since NEC definitions shall not contain requirements. Moreover, the NEC manual of style does not permit the definition to contain the defined term. The sections in 625.3.1 through 625.3.4 are associated with the comments to proposals 12-54 and 12.56 also. The NEC Manual of Style states as follows: Definitions. Definitions shall be in alphabetical order and shall not contain the term that is being defined. Definitions shall not contain requirements or recommendations. CMP-12 rejects changing the definition. The current definition does comply with the NEC Style Manual because it just states what an electrical vehicle connector is and what it is not. In addition, the submitter's text does not add clarity to the article. 12-23 Log #774 NEC-P12 Gregory C. Nieminski, Gregory C. Nieminski, LLC 12-52 Electric Vehicle Connector Electric Vehicle Connector It appears that the term was crossed out inadvertently in the NEC Committee Report on Proposals, (page 70-658,printed version), and should remain. This comment is submitted on behalf of the EPRI Electric Transportation Infrastructure Working Council's NEC Task Force. The submitter's text clarifies that the text of the ROP Draft is correct. However, the text of the Proposal 12-52 has electric vehicle connector struckthrough. CMP-12 accepts that electric vehicle connector is the intended title for this definition. 15
12-24 Log #482 NEC-P12 Marcelo M. Hirschler, GBH International 12-56 The device on the electric vehicle into which the electric vehicle connector is inserted for power transfer and information exchange. This device is part of the electric vehicle coupler. For the purposes of this the electric vehicle inlet is considered to be part of the electric vehicle and not part of the electric vehicle supply equipment. Plug-in hybrid electric vehicles (PHEV) shall be considered electric vehicles. For the purpose of this article, off-road, self-propelled electric vehicles, such as industrial trucks, hoists, lifts, transports, golf carts, airline ground support equipment, tractors, boats, and the like, are not included. Both the electric vehicle connector and the electric vehicle inlet shall be considered a part of the electric vehicle coupler. For the purposes of this Code, the electric vehicle inlet shall be considered to be part of the of the electric vehicle and not part of the electric vehicle supply equipment. I accept the concept that NEC definitions are not required to be in single sentences. However this definition contains a set of requirements. If the CMP agrees that this is a requirement it should be placed somewhere else in Article 625, and a new section 625.3, on general requirements, is the perfect location, since NEC definitions shall not contain requirements. Moreover, the NEC manual of style does not permit the definition to contain the defined term and the second sentence of the definition contains the term electric vehicle inlet. The sections in 625.3.1 through 625.3.4 are associated with the comments to proposals 12-54 and 12.55 also. The NEC Manual of Style states as follows: Definitions. Definitions shall be in alphabetical order and shall not contain the term that is being defined. Definitions shall not contain requirements or recommendations. CMP-12 rejects changing the definition. The current definition does comply with the NEC Style Manual because it just states what an electrical vehicle Inlet is and what it is not. In addition, the submitter's text does not add clarity to the article. 12-25 Log #1375 NEC-P12 Vince Baclawski, National Electrical Manufacturers Association (NEMA) 12-52 Add new definition: Fastened In Place: equipment attached to a structure but removable without the use of tools, where the fastening means are specifically designed to facilitate the following: a. Ready removal for interchange b. Facilitate maintenance and repair c. Repositioning to another location The term or phrase fastened in place is not defined and subject to misinterpretation. The definition is needed for consistency throughout article 625. Add new definition to 625.2 that reads as follows: Equipment attached to a structure either permanently or where the fastening means is specifically designed to facilitate removal for interchange, maintenance and repair, and repositioning to another location. CMP-12 agrees with the need to add a definition for "fastened in place" and has revised the submitter's text to comply with the NEC Style Manual. Tools are not requisite for equipment to be fastened in place. Since "fastened in place" is used several times in Article 625, CMP-12 defines the term to clarify for the users of the code the specific criteria to allow cord and plug connected equipment above 125 volts and 20 amps without permitting portable equipment above 125 volts and 20 amps. 16
12-26 Log #775 NEC-P12 Gregory C. Nieminski, Gregory C. Nieminski, LLC 12-52 An assembly consisting of an attachment plug cap and length of flexible cord that connects the equipment (E SE) to a receptacle. The term "attachment plug cap" appears only once in Article 625 in this definition. The primary term "attachment plug" is used everywhere else in Article 625 and should be used here for consistency. It is also the predominant term used in the NEC and defined in Article 100: Attachment Plug (Plug Cap) (Plug). A device that, by insertion in a receptacle, establishes a connection between the conductors of the attached flexible cord and the conductors connected permanently to the receptacle. Attachment plug cap is a term referring to an older design of an attachment plug that permitted the flexible cord to be knotted for strain relief purposes and covered by a "cap" that was part of the attachment plug assembly. The term is not used in LZ 191. Standard for Attachment Plugs and Receptacles, nor is the method of using a knot for strain relief purposes included in the Standard. This comment is submitted on behalf of the EPRI Electric Transportation Infrastructure Working Council's NEC Task Force. An assembly consisting of an attachment plug and length of flexible cord that connects the electric vehicle supply equipment (EVSE) to a receptacle. CMP-12 revises the submitter's text to remove "cap," add "electric vehicle supply" and editorially correct EVSE. 12-27 Log #797 NEC-P12 Joseph M. Bablo, UL LLC 12-52 The electric vehicle coupler shall comply with 625.10(A) through (F). The electric vehicle coupler shall be polarized unless part of a listed electric vehicle charging system or an electric vehicle supply equipment system. Exception: A coupler that is listed as part of the electric vehicle supply equipment. The intent of this clause would be that the coupler shall be polarized, but a non-polarized version is acceptable if part of a system that is listed. The word unless as indicated in the original proposal would infer that the coupler shall be polarized if part of a system that is not listed and non-polarized if part of a listed system. That is not the intent of the requirement. The proposed wording eliminates this possible interpretation of the clause by adding an exception that is identical to the format used in other parts of the article (see 625.17(A)(1) for example). The electric vehicle coupler shall be polarized. Exception: A coupler that is part of a listed electric vehicle supply equipment. CMP-12 accepts the change to (A). CMP-12 revises the submitter's exception text for clarity. 17
12-27a Log #CC1202 NEC-P12 Code-Making Panel 12, 12-52 Renumber existing 625.14 to 625.41(New). In Table 220.3 Additional Load Calculation References, change 625.14 to 625.41 in the column titled Section (or Part). CMP-12 appropriately relocates text from 625.14 to 625.41 (New). 625.14 Rating correctly applies to Part III Installation rather than Part II Equipment Construction. CMP-12 requests the CC review the correlation of 625.14 to 625.41 with CMP-2. 18
12-28 Log #515 NEC-P12 Ken Jensen, Portland, OR 12-52 Revise 625.14 as follows: "625.14 Rating. Electrical vehicle supply equipment shall have sufficient rating to supply the load served. Electric vehicle charging loads shall be considered to be continuous loads for the purposes of this article. Where an automatic load management system is used, the maximum electric vehicle supply equipment load on a service or feeder or branch circuit shall be the maximum load permitted setting in use or communicated by the automatic load management system. The original TIA sentence in question is copied below: "Where an automatic load management system is used, the maximum electric vehicle supply equipment load on a service or feeder shall be the maximum load permitted by the automatic load management system." The first use of the word "maximum" is clear but, the second use of the word "maximum" is confusing when applied to Electric Vehicle Supply Equipment. Replacing the words "maximum load permitted" with "setting in use or communicated" clarify the intent of the NEC. I found there are two (2) ways of understanding or interpreting this "maximum load permitted" wording within TIA 1038 for NEC 625.14. Today many EVSEs on-board chargers are built to use the standard called "Society of Automotive Engineers J1772". This standard addresses the problem that different premises EVSEs will have different rated ampacities and different electric vehicles will have different loads. SAE J1772 allows many combinations to interconnect with each other by having the premises EVSE communicate or provide to the electric vehicle on-board charger how much ampacity is available from that premises EVSE. Then the electric vehicle on-board charger must adjust or regulate the load so that is less than or equal to the available premises EVSE ampacity. The following text is copied from two (2) revisions of that standard. SAE J1772 2001 "5.3.5 EVSE Current Capacity - The EVSE provides the maximum available continuous current capacity, and by inference the rating of the protective circuit breaker, to the EV by modulating the pulse width..." SAE J1772 2010 "5.3.5 EVSE Current capacity - The EVSE communicates the maximum available continuous current capacity to the EV/HEV by modulating the pilot duty cycle..." Some EVSEs are built to offer a single fixed large communicated available current. However many EVSEs offer multiple or adjustable settings of communicated available current. One common EVSE I know of offers 15amp or 8amp settings. A second common EVSE I know of offers 12 amp, 16 amp, 24 amp, or 30 amp settings. Every single one of these different values is a maximum current value. So an EVSE with multiple settings has a group of maximum current values. The group also has a maximum of all the maximum current values. Which meaning does TIA 1038 NEC 625.14 maximum mean? Is the maximum electric vehicle supply equipment load the real setting of the EVSE? Is the maximum electric vehicle supply equipment load the largest possible, worst case setting of the EVSE? Replacing "maximum load permitted" with "setting or communicated" means the NEC 625.14 will allow a versatile installation of low demand low ampacity or medium demand medium ampacity, or high demand high ampacity. Adding the wording "or branch circuit" to NEC 625.14 text simply reflect a common practice. EVSEs are often installed on a branch circuit. CMP-12 does not agree that the proposed wording will provide clarity. The use of the term "maximum load" is commonly understood in the NEC and is used in several sections. CMP-12 does not agree with the addition of branch circuit because the automatic load management system pertains only to the sizing of a service or feeder. Sizing of branch circuits are required to be sized for continuous loads. 19