NEC Code-Making Panel 4 Second Draft Meeting Agenda November 2-7, 2015 San Diego, CA ...

379 Pages·2015·3.5 MB·English

National Fire Protection Association
1 Batterymarch Park, Quincy, MA 02169-7471
Phone: [phone] • Fax: [phone] • www.nfpa.org

NEC Code-Making Panel 4

Second Draft Meeting Agenda

November 2-7, 2015

San Diego, CA

Item No. Subject

15-11 -1 Call to Order

15-11-2 Introduction of Members and Guests

15-11-3 Approval of A2016 First Draft Meeting Minutes

15-11-4 Review of Meeting Procedures and Revision Schedule

15-11-5 Task Group Reports

15-11-6 Process Public Comments and Develop Second Revisions

15-11-7 Fire Protection Research Foundation Requests

15-11-8 Old Business

15-11-9 New Business

15-11-10 Adjournment
Public Comment No. 1063 Global Input submitted
Public Comment No. 626 Section No. 100,  Field Labeled (as MARVIN HAMON
Public Comment No. 715 Section No. 100,  Field Labeled (as Scott Humphrey
Public Comment No. 917 Section No. 100,  Field Labeled (as MARK BALDASSARI
Public Comment No. 1258 100, Energy Storage System, Pre‐esubmitted
Public Comment No. 125 Article 225 Aaron Adamczyk
Public Comment No. 1754 Section No. 225.10 submitted
Public Comment No. 526 Section No. 225.18 J. Grant Hammett
Public Comment No. 527 Section No. 225.19(D)(2) J. Grant Hammett
Public Comment No. 332 Section No. 225.22 DON GANIERE
Public Comment No. 1134 Section No. 225.27
Public Comment No. 306 Section No. 225.27 TIMOTHY CROUSHORE
Public Comment No. 1755 Section No. 225.30 submitted
Public Comment No. 37 Section No. 225.30(F) J GRANT HAMMETT
Public Comment No. 793 Section No. 225.30(F) JOHN MASARICK
Public Comment No. 813 Section No. 225.32 James Dollard
Public Comment No. 1756 Section No. 225.38(C) submitted
Public Comment No. 1091  Section after 225.40 Vincent Saporita
Public Comment No. 823  Section after 225.40 VINCE BACLAWSKI
Public Comment No. 304 Section after 230.2(A) TIMOTHY CROUSHORE
Public Comment No. 346 Section after 230.3 DARRELL SUMBERA
Public Comment No. 1757 Section No. 230.7 submitted
Public Comment No. 528 Section No. 230.9(B) J. Grant Hammett
Public Comment No. 1680 Section No. 230.29 submitted
Public Comment No. 360 Section No. 230.29 MIKE HOLT
Public Comment No. 967 Section No. 230.29 Christine Porter
Public Comment No. 1758 Section No. 230.30(A) submitted
Public Comment No. 1759 Section No. 230.41 submitted
Public Comment No. 858 Section No. 230.41 L. Keith Lofland
Public Comment No. 1120 Section No. 230.42(A) JEFFREY FECTEAU
Public Comment No. 1555 Section No. 230.42(A) submitted
Public Comment No. 1760 Section No. 230.42(A) submitted
Public Comment No. 1148 Section No. 230.44 Christel Hunter
Public Comment No. 1762 Section No. 230.44 submitted
Public Comment No. 700 Section No. 230.44 Richard Loyd
Public Comment No. 864 Section No. 230.53 L. Keith Lofland
Public Comment No. 333 Section No. 230.54(C) DON GANIERE
Public Comment No. 1122 Section No. 230.66 JEFFREY FECTEAU
Public Comment No. 1384 Section No. 230.66 submitted
Public Comment No. 1724 Section No. 230.66 submitted
Public Comment No. 1763 Section No. 230.66 submitted
Public Comment No. 362 Section No. 230.66 MIKE HOLT
Public Comment No. 363 Section No. 230.66 MIKE HOLT
Public Comment No. 406 Section No. 230.66 ROLAND DEIKE
Public Comment No. 772 Section No. 230.66 JOHN MASARICK
Public Comment No. 1265  Section after 230.66 submitted
Public Comment No. 979 Section after 230.70(A)(1) Matthew Paiss
Public Comment No. 1082 Section No. 230.70(A)(1) Vincent Saporita
Public Comment No. 1591 Section No. 230.70(A)(1) submitted
Public Comment No. 1661 Section No. 230.70(A)(1) submitted
Public Comment No. 1764 Section No. 230.71(A) submitted
Public Comment No. 334 Section No. 230.95(C) DON GANIERE
Public Comment No. 126 Section No. 230.200 Aaron Adamczyk
Public Comment No. 643 Section No. 690, Part VIII. Ward Bower
Public Comment No. 1299 Section No. 690.1 submitted
Public Comment No. 1845 Section No. 690.1 submitted
Public Comment No. 647 Section No. 690.1 Ward Bower
Public Comment No. 1360 691.2, Engineering Supervision. submitted
Public Comment No. 1495 690.2, Engineering Supervision. submitted
Public Comment No. 1633 691.2,  Engineering Supervision. submitted
Public Comment No. 1726 690.2, Engineering Supervision. submitted
Public Comment No. 1846 690.2, Engineering Supervision. submitted
Public Comment No. 648 Section No. 690.2, Generating CapWard Bower
Public Comment No. 1847 690.2, Photovoltaic System Voltagesubmitted
Public Comment No. 1018 Section No. 690.2, Reference GrouBill Brooks
Public Comment No. 1324 Section No. 690.4(B) submitted
Public Comment No. 586 Section No. 690.4(B) MARK BALDASSARI
Public Comment No. 649 Section No. 690.4(D) Ward Bower
Public Comment No. 889 Section No. 690.4(D) MARK BALDASSARI
Public Comment No. 101 Section No. 690.7 Aaron Adamczyk
Public Comment No. 477 Section No. 690.7 MIKE HOLT
Public Comment No. 651 Section No. 690.7 Ward Bower
Public Comment No. 1074 Section No. 690.7  JIM EICHNER
Public Comment No. 1883 Section No. 690.7
Public Comment No. 587 Section No. 690.7  MARK BALDASSARI
Public Comment No. 1198 Section No. 690.7(A) BRIAN LYDIC
Public Comment No. 276 Section No. 690.7(A) MARVIN HAMON
Public Comment No. 588 Section No. 690.7(A) MARK BALDASSARI
Public Comment No. 995 Section No. 690.7(A) Bill Brooks
Public Comment No. 492 Section No. 690.7(B) MARVIN HAMON
Public Comment No. 1362 Section No. 690.7(C) submitted
Public Comment No. 1169 Section No. 690.10 Bill Brooks
Public Comment No. 499 Section No. 690.10 MARVIN HAMON
Public Comment No. 1318 Section No. 690.11 submitted
Public Comment No. 1703 Section No. 690.11 submitted
Public Comment No. 1849 Section No. 690.11 submitted
Public Comment No. 500 Section No. 690.11 MARVIN HAMON
Public Comment No. 890 Section No. 690.11 MARK BALDASSARI
Public Comment No. 1081 Section No. 690.12 P Cocker
Public Comment No. 1210 Section No. 690.12 Richard Davis
Public Comment No. 1255 Section No. 690.12 submitted
Public Comment No. 1266 Section No. 690.12 submitted
Public Comment No. 1332 Section No. 690.12 submitted
Public Comment No. 1391 Section No. 690.12 submitted
Public Comment No. 1394 Section No. 690.12 submitted
Public Comment No. 1408 Section No. 690.12 submitted
Public Comment No. 1410 Section No. 690.12 submitted
Public Comment No. 1438 Section No. 690.12 submitted
Public Comment No. 1444 Section No. 690.12 submitted
Public Comment No. 1536 Section No. 690.12 submitted
Public Comment No. 1850 Section No. 690.12 submitted
Public Comment No. 483 Section No. 690.12 Corey Condren
Public Comment No. 585 Section No. 690.12 MARK BALDASSARI
Public Comment No. 887 Section No. 690.12 JOHN JUSTICE
Public Comment No. 1338 Section No. 690.12(A) submitted
Public Comment No. 1413 Section No. 690.12(A) submitted
Public Comment No. 1104 Section No. 690.12(B) Geoffrey Kinsey
Public Comment No. 1342 Section No. 690.12(B) submitted
Public Comment No. 1382 Section No. 690.12(B) submitted
Public Comment No. 1386 Section No. 690.12(B) submitted
Public Comment No. 1388 Section No. 690.12(B) submitted
Public Comment No. 1407 Section No. 690.12(B) submitted
Public Comment No. 1433 Section No. 690.12(B) submitted
Public Comment No. 1503 Section No. 690.12(B) submitted
Public Comment No. 1569 Section No. 690.12(B) submitted
Public Comment No. 1664 Section No. 690.12(B) submitted
Public Comment No. 1696 Section No. 690.12(B) submitted
Public Comment No. 516 Section No. 690.12(B) MARVIN HAMON
Public Comment No. 518 Section No. 690.12(B) MARVIN HAMON
Public Comment No. 1224 Section No. 690.12(B) CHARLES PICARD
Public Comment No. 1693 Section No. 690.12(E) submitted
Public Comment No. 502 Section No. 690.12(F)(2) MARVIN HAMON
Public Comment No. 891 Section after 690.12(F)(2) James Penn
Public Comment No. 1851 Section No. 690.13 submitted
Public Comment No. 1000 Section No. 690.13(A) Bill Brooks
Public Comment No. 924 Section No. 690.13(B) Todd Fries
Public Comment No. 927 Section No. 690.13(B) MARIA BAYLIS
Public Comment No. 653 Section No. 690.13(C) Ward Bower
Public Comment No. 1692 Section No. 690.13(E) submitted
Public Comment No.1001 Section No. 690.13(F)
Public Comment No. 922 Section No. 690.15  Todd Fries
Public Comment No. 1269 Section No. 690.15 [Excluding any submitted
Public Comment No. 1852 Section No. 690.15 [Excluding any submitted
Public Comment No. 1727 Section No. 690.15(B) submitted
Public Comment No. 1225 Section No. 690.15(C) submitted
Public Comment No. 1728 Section No. 690.15(C) submitted
Public Comment No. 1002 Section No. 690.15(D) Bill Brooks
Public Comment No. 1598 Section No. 690.15(D) submitted
Public Comment No. 654 Section No. 690.15(D) Ward Bower
Public Comment No. 925 Section No. 690.15(D) Todd Fries
Public Comment No. 503 Section No. 690.31(A) MARVIN HAMON
Public Comment No. 511 Section No. 690.31(B)(1) MARVIN HAMON
Public Comment No. 1003 Section No. 690.31(C) Bill Brooks
Public Comment No. 1163 Section No. 690.31(C) Christel Hunter
Public Comment No. 1320 Section No. 690.31(C) submitted
Public Comment No. 1853 Section No. 690.31(C) submitted
Public Comment No. 478 Section No. 690.31(C) MIKE HOLT
Public Comment No. 479 Section No. 690.31(C) MIKE HOLT
Public Comment No. 1163 Section No. 690.31(C) Christel Hunter
Public Comment No. 1398 Section No. 690.31(D) submitted
Public Comment No. 1601 Section No. 690.31(E) submitted
Public Comment No. 1854 Section No. 690.31(E) submitted
Public Comment No. 670 Section No. 690.31(E) Ward Bower
Public Comment No. 1004 Section No. 690.31(G) Bill Brooks
Public Comment No. 897 Section No. 690.31(G)(3) MARK BALDASSARI
Public Comment No. 898 Section No. 690.31(G)(4) MARK BALDASSARI
Public Comment No. 519 Section No. 690.31(J) MARVIN HAMON
Public Comment No. 1855 Section No. 690.33 [Excluding any submitted
Public Comment No. 1610 Section No. 690.33(C) submitted
Public Comment No. 513 Section No. 690.34 JEFFREY FECTEAU
Public Comment No. 1590 Section No. 690.8(A)(1) submitted
Public Comment No. 1723 Section No. 690.8(A)(1) submitted
Public Comment No. 493 Section No. 690.8(A)(1) MARVIN HAMON
Public Comment No. 996 Section No. 690.8(A)(1) Bill Brooks
Public Comment No. 1085 Section No. 690.8(B) JIM EICHNER
Public Comment No. 1848 Section No. 690.9 submitted
Public Comment No. 998 Section No. 690.9(A) Bill Brooks
Public Comment No. 1090 Section No. 690.9(B) JIM EICHNER
Public Comment No. 1314 Section No. 690.9(B) submitted
Public Comment No. 989 Section No. 690.9(B) PHIL UNDERCUFFLER
Public Comment No. 1710 Section No. 690.9(C) submitted
Public Comment No. 999 Section No. 690.9(C) Bill Brooks
Public Comment No. 1013 Section No. 690.41 Bill Brooks
Public Comment No. 521 Section No. 690.41(A) MARVIN HAMON
Public Comment No. 1562 Section No. 690.41(B)(1) submitted
Public Comment No. 1631 Section No. 690.41(B)(2) submitted
Public Comment No. 671 Section No. 690.41(B)(2) Ward Bower
Public Comment No. 900 Section No. 690.41(B)(2) MARK BALDASSARI
Public Comment No. 1007 Section No. 690.42 Bill Brooks
Public Comment No. 1008 Section No. 690.45 Bill Brooks
Public Comment No. 1611 Section No. 690.45 submitted
Public Comment No. 1856 Section No. 690.45 submitted
Public Comment No. 522 Section No. 690.45 MARVIN HAMON
Public Comment No. 672 Section No. 690.45 Ward Bower
Public Comment No. 1363 Section No. 690.47(A) submitted
Public Comment No. 936 Section No. 690.47(A) MARK BALDASSARI
Public Comment No. 1179 Section No. 690.47(B) DAVID CLEMENTS
Public Comment No. 1857 Section No. 690.53 submitted
Public Comment No. 903 Section No. 690.53 MARK BALDASSARI
Public Comment No. 1009 Section No. 690.55 Bill Brooks
Public Comment No. 673 Section No. 690.56 Ward Bower
Public Comment No. 1858 Section No. 690.56(B) submitted
Public Comment No. 1355 Section No. 690.56(C) submitted
Public Comment No. 1658 Section No. 690.56(C) submitted
Public Comment No. 619 Section No. 690.56(C) MARVIN HAMON
Public Comment No. 997 Section No. 690.56(C) PHIL UNDERCUFFLER
Public Comment No. 1337 Section No. 690.60 submitted
Public Comment No. 1158 Section No. 690.61 PHIL UNDERCUFFLER
Public Comment No. 905 Section No. 690.63 MARK BALDASSARI
Public Comment No. 906 Section No. 690.64 MARK BALDASSARI
Public Comment No. 644 Section No. 690.71 Ward Bower
Public Comment No. 1010 Section No. 690.72 Bill Brooks
Public Comment No. 645 Section No. 690.72 Ward Bower
Public Comment No. 1146 Sections 690.72(B), 690.72(C) PHIL UNDERCUFFLER
Public Comment No. 915 Section No. 690.72(B)(3) MARK BALDASSARI
Public Comment No. 1011 Section No. 690.74 Bill Brooks
Public Comment No. 1152 Section No. 690.74 PHIL UNDERCUFFLER
Public Comment No. 646 Section No. 690.74 Ward Bower
Public Comment No. 1859 Section No. 690.74(A) submitted
Public Comment No. 1290  Section after 690.61 submitted
Public Comment No. 1711 Article 691 submitted
Public Comment No. 102 Section No. 691.1 Aaron Adamczyk
Public Comment No. 1613 Section No. 691.1 submitted
Public Comment No. 557 Section No. 691.1 JIM EICHNER
Public Comment No. 624 Section No. 691.1 MARVIN HAMON
Public Comment No. 730 Section No. 691.1 Scott Humphrey
Public Comment No. 702 691.2, Engineering Supervision. Scott Humphrey
Public Comment No. 713 691.2, Engineering Supervision. Scott Humphrey
Public Comment No. 1149 Section No. 691.2,  Engineering SupBill Brooks
Public Comment No. 620 Section No. 691.2, Engineering SupMARVIN HAMON
Public Comment No. 621 Section No. 691.2, Generating CapMARVIN HAMON
Public Comment No. 628 Section No.691.2, Generating StatiMARVIN HAMON
Public Comment No. 716 Section No. 691.2, Utility DistributiScott Humphrey
Public Comment No. 622 Section No.691.2, Utility Dis... to UMARVIN HAMON
Public Comment No. 717 Section No. 691.2, Utility TransmisScott Humphrey
Public Comment No. 625 Section No. 691.4 MARVIN HAMON
Public Comment No. 627 Section No. 691.4 MARVIN HAMON
Public Comment No. 718 Section No. 691.4 Scott Humphrey
Public Comment No. 719 Section No. 691.5 Scott Humphrey
Public Comment No. 1399 Section No. 692.6 submitted
Public Comment No. 1524 Section No. 691.6 submitted
Public Comment No. 721 Section No. 691.6 Scott Humphrey
Public Comment No. 1556 Section No. 691.7 submitted
Public Comment No. 629 Section No. 691.7 MARVIN HAMON
Public Comment No. 723 Section No. 691.7 Scott Humphrey
Public Comment No. 1083 Section No. 691.8 JIM EICHNER
Public Comment No. 1564 Section No. 691.8 submitted
Public Comment No. 725 Section No. 691.8 Scott Humphrey
Public Comment No. 726 Section No. 691.9 Scott Humphrey
Public Comment No. 728 Section No. 691.10 Scott Humphrey
Public Comment No. 1668 Section No. 691.11 submitted
Public Comment No. 729 Section No. 691.11 Scott Humphrey
Public Comment No. 1860 Section No. 692.1 submitted
Public Comment No. 1708  Section No. 694, Part after I. submitted
Public Comment No. 1066 Section No. 694.1 MARVIN HAMON
Public Comment No. 1861 Section No. 694.1 submitted
Public Comment No. 656 Section No. 694.1 Robert Wills
Public Comment No. 809 Section No. 694.2 Tower Marcelo Hirschler
Public Comment No. 808 Section No.694.2, Guy+B278 Marcelo Hirschler
Public Comment No. 1371 Section No. 694.7(B) submitted
Public Comment No. 1403 Section No. 694.7(F) submitted
Public Comment No. 1862  Section after 694.15 submitted
Public Comment No. 1405 Section No. 694.15(C) submitted
Public Comment No. 1521 Section No. 705, Part IV. submitted
Public Comment No. 1213 Section No. 705.1 PHIL UNDERCUFFLER
Public Comment No. 351 Section No. 705.1 TIMOTHY CROUSHORE
Public Comment No. 1638 705.2 Intentionally Islanded Systemsubmitted
Public Comment No. 1864 705.2, Intentionally Islanded Systesubmitted
Public Comment No. 1457 705.2, Island Interconnection Devicsubmitted
Public Comment No. 1484 705.2, Island Interconnection Devicsubmitted
Public Comment No. 1006 Section No. 705.2, Intentionally IslaPHIL UNDERCUFFLER
Public Comment No. 919 Section No. 705.2, Multimode InveMARK BALDASSARI
Public Comment No. 1506 705.2,  Stand‐Alone System. submitted
Public Comment No. 1516 Section No. 705.3 submitted
Public Comment No. 1865 Section No. 705.3 submitted
Public Comment No. 1012 Section No. 705.6 PHIL UNDERCUFFLER
Public Comment No. 1335 Section No. 705.6 submitted
Public Comment No. 1866 Section No. 705.6 submitted
Public Comment No. 480 Section No. 705.6 MIKE HOLT
Public Comment No. 674 Section No. 705.6 Ward Bower
Public Comment No. 921 Section No. 705.6 MARK BALDASSARI
Public Comment No. 1651 Section No. 705.8 submitted
Public Comment No. 1072 Section No. 705.12 MARVIN HAMON
Public Comment No. 1076 Section No. 705.12(D) [Excluding aMARVIN HAMON
Public Comment No. 1162 Section No. 705.12(D)(2) Bill Brooks
Public Comment No. 1164 Section No. 705.12(D)(2) JOEL FRANGQUIST]
Public Comment No. 1356 Section No. 705.12(D)(2) submitted
Public Comment No. 1164 Section No. 705.12(D)(2) [ Not Specified ]
Public Comment No. 1079 Section No. 705.12(D)(5) MARVIN HAMON
Public Comment No. 1867 Section No. 705.22 submitted
Public Comment No. 348 Section No. 705.23 TIMOTHY CROUSHORE
Public Comment No. 1105 Section No. 705.31 MARVIN HAMON
Public Comment No. 1868 Section No. 705.65 submitted
Public Comment No. 1227 Section No. 705.155 submitted
Public Comment No. 1208 Section No. 705.170 PHIL UNDERCUFFLER
Public Comment No. 1209 Section No. 705.170 PHIL UNDERCUFFLER
Public Comment No. 1531 Section No. 705.170 submitted
Public Comment No. 1015 Section No. 705.175 PHIL UNDERCUFFLER
Public Comment No. 1535 Section No. 705.175 submitted
Public Comment No. 349 Section No. 705.175 TIMOTHY CROUSHORE
Public Comment No. 1014 Section No. 705.175 [Excluding anyPHIL UNDERCUFFLER
National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
Public Comment No. 1063-NFPA 70-2015 [ Global Input ]
Article 100 Definitions
Voltage, Nominal…..
Informational Note No. 3: Certain 48-volt DC battery units have a charging float voltage up to 58 volts. In DC
applications 60 volts is used to cover the entire range of float voltages.
Article 110
110.27 Guarding of Live Part
(A) Live Parts Guarded Against Accidental Contact. Except as elsewhere required or permitted by this Code, live parts of
electrical equipment operating at 50 volts AC/60 volts DCor more shall be guarded against accidental contact by approved
enclosures or by any of the following means:
Article 200 Use and Identification of Grounded Conductors
200.7
(B) Circuits of Less Than 50 VoltsAC. A conductor with white or gray color insulation or three continuous white stripes or
having a marking of white or gray at the termination for circuits of less than 50 volts ACshall be required to be grounded only as
required by 250.20(A).
C) Circuits of 50 Volts AC or More. The use of insulation that is white or gray or that has three continuous white or gray stripes
for other than a grounded conductor for circuits of 50 volts ACor more shall be permitted only as in (1) and (2).
Article 215 Feeders
215.12(C)(2) Feeders Supplied from Direct-Current Systems.
Where a feeder is supplied from a dc system operating at more than 50 60 volts, each ungrounded conductor of 4 AWG or
larger shall be identi?ed by polarity at all termination, connection, and splice points by marking tape, tagging, or other
approved means; each ungrounded conductor of 6 AWG or smaller shall be identi?ed by polarity at all termination,
connection, and splice points in compliance with 215.12(C)(2)(a) and (b). The identi?cation methods utilized for
conductors originating within each feeder panelboard or similar feeder distribution equipment shall be documented in
a manner that is readily available or shall be permanently posted at each feeder panelboard or similar feeder
distribution equipment.
Article 430 Motors, Motor Circuits, and Controllers
430.232 Where Required. Exposed live parts of motors and controllers operating at 50 volts DCor more between terminals
shall be guarded against accidental contact by enclosure or by location as follows:
430.233 Guards for Attendants. Where live parts of motors or controllers operating at over 50 volts ACto ground are guarded
against accidental contact only by location as specified in 430.232, and where adjustment or other attendance may be
necessary during the operation of the apparatus, suitable insulating mats or platforms shall be provided so that the attendant
cannot readily touch live parts unless standing on the mats or platforms.
Article 445 Generators
445.14 Protection of Live Parts. Live parts of generators operated at more than 50 volts AC/60 volts DCto ground shall not
be exposed to accidental contact where accessible to unquali?ed persons.
Article 460 Capacitors
460.6(A) Time of Discharge. The residual voltage of a capacitor shall be reduced to 50 volts DC , nominal, or less within 1
minute after the capacitor is disconnected from the source of supply.
460.28(A) Means for Discharge. A means shall be provided to reduce the residual voltage of a capacitor to 50 volts DCor less
within 5 minutes after the capacitor is disconnected from the source of supply.
Article 480 Storage Batteries
480.5 Overcurrent Protection for Prime Movers. Overcurrent protection shall not be required for conductors from a battery
with a nominal voltage of 60 volts DC or less if the battery provides power for starting, ignition, or control of prime
movers. Section 300.3 shall not apply to these conductors.
480.6 DC Disconnect Methods. (A) Disconnecting Means. A disconnecting means shall be provided for all ungrounded
conductors derived from a stationary battery system with a nominal voltage over 60 volts DC. A disconnecting means
shall be readily accessible and located within sight of the battery system.
Article 522 Control Systems for Permanent Amusement Attractions
522.25 Ungrounded Control Circuits. Separately derived ac and 2-wire dc circuits and systems 50 volts AC/60 volts DCor
greater shall be permitted to be ungrounded, provided that all the following conditions are met:
Article 625
625.18 Interlock. Electric vehicle supply equipment shall be provided with an interlock that de-energizes the electric
vehicle connector whenever the electrical connector is uncoupled from the electric vehicle. An interlock shall not be
required for portable cord-and-plug-connected electric vehicle supply equipment intended for connection to
1 of 2079 10/1/2015 11:02 AM
National Fire Protection Association Report http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
receptacle outlets rated at 125 volts, single phase, 15 and 20 amperes. An interlock shall not be required for dc
supplies less than5060volts dc.
625.19 Automatic De-Energization of Cable. The electric vehicle supply equipment or the cable-connector
combination of the equipment shall be provided with an automatic means to de-energize the cable conductors and
electric vehicle connector upon exposure to strain that could result in either cable rupture or separation of the cable
from the electric connector and exposure of live parts. Automatic means to de-energize the cable conductors and
electric vehicle connector shall not be required for portable cord-and-plug-connected electric vehicle supply
equipment intended for connection to receptacle outlets rated at 125 volts, single phase, 15 and 20 amperes. An
interlock shall not be required for dc supplies less than 5060volts dc.
625.44 Electric Vehicle Supply Equipment Connection.
Electric vehicle supply equipment shall be permitted to be cord and plug-connected to the premises wiring system in
accordance with one of the following:
(A) Connections to 125-Volt, Single-Phase, 15 and 20-Ampere Receptacle Outlets. Electric vehicle supply equipment intended
for connection to non-locking, 2-pole,3-wire grounding-type receptacle outlets rated at 125 V, single phase, 15 and 20 amperes
or from a supply of less than 5060 volts dc.
(4) Supply Circuits. The supply circuit to the mechanical ventilation equipment shall be electrically interlocked with
the electric vehicle supply equipment and shall remain energized during the entire electric vehicle charging cycle.
Electric vehicle supply equipment shall be marked in accordance with625.15. Electric vehicle supply equipment
receptacles rated at 125 volts, single phase, 15 and 20 amperes shall be marked in accordance with 625.15 and
shall be switched, and the mechanical ventilation system shall be electrically interlocked through the switch supply
power to the receptacle. Electric vehicle supply equipment supplied from less than5060 volts dc shall be marked in
accordance with 625.15(C) and shall be switched, and the mechanical ventilation system shall be electrically
interlocked through the switch supply power to the electric vehicle supply equipment.
Article 669 Electroplating
669.6 Wiring Methods. Conductors connecting the electrolyte tank equipment to the conversion equipment shall be
in accordance with 669.6(A) and (B).
(A) Systems Not Exceeding 5060Volts Direct Current. Insulated conductors shall be permitted to be run without insulated
support, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permitted where
supported on insulators.
(B) Systems Exceeding 50 60 Volts Direct Current. Insulated conductors shall be permitted to be run on insulated
supports, provided they are protected from physical damage. Bare copper or aluminum conductors shall be permitted
where supported on insulators and guarded against accidental contact up to the point of termination in accordance
with 110.27.
Article720 Circuits and Equipment Operating at Less than 50 Volts
Circuits and Equipment Operating at Less Than 50 Volts AC/60 Volts DC.
720.1 Scope. This article covers installations operating at less than 50 volts, alternating current, or 60 voltsdirectcurrentor
alternating current.
720.11 Mechanical Execution of Work.Circuits operating at less than 50 voltsAC or 60 volts DCshall be installed
in a neat and workmanlike manner. Cables shall be supported by the building structure in such a manner that the
cable will not be damaged by normal building use.Type your content here ...
Statement of Problem and Substantiation for Public Comment
Over the past decade numerous code articles have been placed into the NEC as a result of the increased resurgence of DC systems.
These systems, similar to their AC counterpart, have mandated code requirements that must be met when the system voltage exceeds
a certain threshold. For years the system threshold for many of the requirements has been kept at the 50 volt level. While this is
appropriate for AC systems, it can create confusion to the user of the document when applied to a 48 DC batteries during charging
where a “float voltage” is common at 58 volts. The float voltage can vary significantly depending on battery chemistry, battery
construction, and the actual ambient temperature. This voltage may be constant for the entire duration of the charge or can fluctuate.
Some 48 volt DC systems stay above the 50 volt threshold for 99% of the time for applications such as telecommunications, UPS
systems and emergency lighting.
This elevated voltage may create confusion since various AHJ’s might see 58 volts and mandate that a code rule must be followed
since the 50 volt threshold has been increased. To resolve these issues a DC task group was formed to research the DC systems
found in the NEC and to correlate the various DC topics that were being added to the NEC. The task group recommended the use of
60 volt DC throughout the code to eliminate the confusion that could arise from the elevated float voltage. The intent of the task group
was to provide a consistent use of the voltage threshold within the NEC document.
For the 2017 NEC Revision Cycle, a task group was formed to correlate the use of the 50/60V threshold and provide public comments
for the second draft. The task group members Larry Ayer (Chair), Bill Cantor, Donny Cook, Jim Dollard (Co-Chair), John Kovacik (DC
Task Group Chair), Ernie Gallo, Vince Saporita, and Jim White provided input and guidance for these recommendations.
To correlate the use of 50 volts for AC systems and 60 volts for DC systems, the recommended NEC changes are based on the
following:
2 of 2079 10/1/2015 11:02 AM