Table Of ContentNational Fire Protection Association
1 Batterymarch Park, Quincy, MA 02169-7471
Phone: 617-770-3000 • Fax: 617-770-0700 • www.nfpa.org
NEC Code-Making Panel 13
Second Draft Meeting Agenda
November 9-14, 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 Lawrence Ayer
Public Comment No. 761 Section No. 445.6 (new) ALFIO TORRISI
Public Comment No. 253 Section No. 445.10 GARY OLSON
Public Comment No. 1215 Section No. 445.11 Timothy Windey
Public Comment No. 1466 Section No. 445.11 submitted
Public Comment No. 252 Section No. 445.11 GARY OLSON
Public Comment No. 325 Section No. 445.11 TIMOTHY CROUSHORE
Public Comment No. 508 Section No. 445.11 Joseph Harding
Public Comment No. 509 Section No. 445.13(B) Joseph Harding
Public Comment No. 254 Section No. 445.18(A) GARY OLSON
Public Comment No. 784 Section No. 445.18(A) JOHN MASARICK
Public Comment No. 1200 Section No. 445.18(B) Timothy Windey
Public Comment No. 1494 Section No. 445.18(B) submitted
Public Comment No. 510 Section No. 445.18(C) Joseph Harding
Public Comment No. 1170 Section No. 445.20 JEFF JONAS
Public Comment No. 512 Section No. 445.20 Joseph Harding
Public Comment No. 837 Section No. 445.20 VINCE BACLAWSKI
Public Comment No. 956 Section No. 445.20 James Dollard
Public Comment No. 1144 Article 480 PHIL UNDERCUFFLER
Public Comment No. 167 Section No. 480.1 Aaron Adamczyk
Public Comment No. 1490 Section No. 480.2 Terminal. submitted
Public Comment No. 1863 Section No. 695.4(B) submitted
Public Comment No. 1412 Section No. 695.4(B)(1) submitted
Public Comment No. 210 Section No. 695.4(B)(3) LAWRENCE FORSHNER
Public Comment No. 963 Section No. 695.4(B)(3) James Dollard
Public Comment No. 838 Section No. 695.6(A)(2) VINCE BACLAWSKI
Public Comment No. 211 Section No. 695.6(G) LAWRENCE FORSHNER
Public Comment No. 658 Section No. 695.14(E) Raymond Horner
Public Comment No. 1201 Section No. 695.14(F) Timothy Windey
Public Comment No. 1171 700.2, Luminaire, Directly ContMitchell Hefter
Public Comment No. 666 700.2, Luminaire, Directly ContMICHAEL SHULMAN
Public Comment No. 1666 Sections 700.3(B), 700.3(C), 700submitted
Public Comment No. 347 Section No. 700.3(C) TIMOTHY CROUSHORE
Public Comment No. 317 Section No. 700.3(F) DANIEL CARON
Public Comment No. 788 Section No. 700.3(F) JOHN MASARICK
Public Comment No. 1417 Section after 700.4 submitted
Public Comment No. 982 Section No. 700.4 Phil Simmons
Public Comment No. 1424 Section No. 700.4(A) submitted
Public Comment No. 318 Section No. 700.4(B) DANIEL CARON
Public Comment No. 1416 Section No. 700.5(C) submitted
Public Comment No. 749 Section No. 700.5(E) JOHN MASARICK
Public Comment No. 1129 Section No. 700.10(A) james dorsey
Public Comment No. 395 Section No. 700.10(D) [ExcludinLAWRENCE FORSHNER
Public Comment No. 603 Section No. 700.10(D)(1) DON TREMAGLIO
Public Comment No. 786 Section No. 700.10(D)(1) JOHN MASARICK
Public Comment No. 840 Section No. 700.10(D)(1) VINCE BACLAWSKI
Public Comment No. 1203 Section No. 700.10(D)(3) Timothy Windey
Public Comment No. 563 Section No. 700.12 [Excluding aJEFFREY FECTEAU
Public Comment No. 431 Section No. 700.12(A) MICHAEL SHULMAN
Public Comment No. 433 Section No. 700.12(F)(2) MICHAEL SHULMAN
Public Comment No. 434 Section No. 700.12(F)(2) MICHAEL SHULMAN
Public Comment No. 258 Section No. 700.32 GARY OLSON
Public Comment No. 750 Section No. 701.5(D) JOHN MASARICK
Public Comment No. 257 Section No. 701.6(D) GARY OLSON
Public Comment No. 432 Section No. 701.12(A) MICHAEL SHULMAN
Public Comment No. 435 Section No. 701.12(G) MICHAEL SHULMAN
Public Comment No. 436 Section No. 701.12(G) MICHAEL SHULMAN
Public Comment No. 259 Section No. 701.27 GARY OLSON
Public Comment No. 124 Section No. 702.5 BRIAN BAUGHMAN
Public Comment No. 751 Section No. 702.5 JOHN MASARICK
Public Comment No. 256 Section after 702.6 GARY OLSON
Public Comment No. 664 Section No. 702.7(C) ALFIO TORRISI
Public Comment No. 547 Section No. 702.12(B) ALFIO TORRISI
Public Comment No. 974 Section No. 702.12(C) Travis Foster
Public Comment No. 1096 Article 706 MARVIN HAMON
Public Comment No. 1187 Article 706 STEPHEN MCCLUER
Public Comment No. 1195 Article 706, Part III STEPHEN MCCLUER
Public Comment No. 1088 706.2, Battery MARVIN HAMON
Public Comment No. 1712 706.2, Battery Terminal. submitted
Public Comment No. 1478 706.2, Electrochemical Battery submitted
Public Comment No. 1116 706.2, Electrolyte... to Energy SMARVIN HAMON
Public Comment No. 1049 Section No. 706.2 ,Energy StoraSTEPHEN MCCLUER
Public Comment No. 1482 Section No. 706, Part III. submitted
Public Comment No. 1504 Section No. 706, Part III. submitted
Public Comment No. 1480 Section No. 706.3 submitted
Public Comment No. 1682 Section No. 706.3 submitted
Public Comment No. 1115 Section No. 706.4 MARVIN HAMON
Public Comment No. 1729 Section No. 706.3 submitted
Public Comment No. 1557 Section No. 706.5 submitted
Public Comment No. 1637 Section No. 706.5 submitted
Public Comment No. 1725 Section No. 706.7 submitted
Public Comment No. 1101 Section No. 706.7(B) MARVIN HAMON
Public Comment No. 1102 Section No. 706.7(D) MARVIN HAMON
Public Comment No. 1137 Section No. 706.7(D) PHIL UNDERCUFFLER
Public Comment No. 1138 Section No. 706.7(D) PHIL UNDERCUFFLER
Public Comment No. 1184 Section No. 706.7(D) STEPHEN MCCLUER
Public Comment No. 1596 Section No. 706.7(D) submitted
Public Comment No. 1714 Section No. 706.7(D) submitted
Public Comment No. 1117 Section No. 706.7(E) MARVIN HAMON
Public Comment No. 1119 Section No. 706.7(E) MARVIN HAMON
Public Comment No. 1186 Section No. 706.7(E) STEPHEN MCCLUER
Public Comment No. 1270 Section No. 706.7(E) submitted
Public Comment No. 1271 Section No. 706.8 [Excluding ansubmitted
Public Comment No. 1646 Section No. 706.8(B) submitted
Public Comment No. 1273 Section No. 706.8(C) submitted
Public Comment No. 314 Section No. 706.8(C) Richard Hockney
Public Comment No. 842 Section No. 708.10(C)(2) VINCE BACLAWSKI
Public Comment No. 1189 Section No. 706.10(A) STEPHEN MCCLUER
Public Comment No. 1190 Section after 706.10(C) STEPHEN MCCLUER
Public Comment No. 1191 Section after 706.10(E) STEPHEN MCCLUER
Public Comment No. 1277 Section No. 706.10(D) submitted
Public Comment No. 1139 Section No. 706.20(A) PHIL UNDERCUFFLER
Public Comment No. 1715 Section No. 706.20(A) submitted
Public Comment No. 1192 Section No. 706.20(A)(3) STEPHEN MCCLUER
Public Comment No. 1121 Section No. 706.21 MARVIN HAMON
Public Comment No. 1605 Sections 706.21(A), 706.21(B), submitted
Public Comment No. 1112 Section No. 706.21(A) MARVIN HAMON
Public Comment No. 1193 Section No. 706.21(A) STEPHEN MCCLUER
Public Comment No. 1194 Section No. 706.21(B) STEPHEN MCCLUER
Public Comment No. 1629 Section No. 706.21(C) submitted
Public Comment No. 1196 Section No. 706.21(E) STEPHEN MCCLUER
Public Comment No. 1280 Section No. 706.21(E) submitted
Public Comment No. 1393 Section No. 706.21(E) submitted
Public Comment No. 1281 Section No. 706.22 submitted
Public Comment No. 1124 Section No. 706.23(B)(3) MARVIN HAMON
Public Comment No. 315 Section No. 706.23(B)(3) Richard Hockney
Public Comment No. 1140 Section No. 706.23(C) PHIL UNDERCUFFLER
Public Comment No. 1720 Section No. 706.23(C) submitted
Public Comment No. 1526 Section No. 706.30 submitted
Public Comment No. 1283 Section No. 706.30(A) submitted
Public Comment No. 1533 Section No. 706.30(A) submitted
Public Comment No. 1507 Section No. 706.30(B) submitted
Public Comment No. 1284 Section No. 706.30(D) submitted
Public Comment No. 1512 Section No. 706.30(D) submitted
Public Comment No. 1257 Section No. 706.30(E) submitted
Public Comment No. 1286 Section No. 706.30(E) submitted
Public Comment No. 1485 Section No. 706.30(E) submitted
Public Comment No. 1736 Section No. 706.30(E) submitted
Public Comment No. 1487 Section No. 706.34 [Excluding asubmitted
Public Comment No. 1493 Section No. 706.34(B) submitted
Public Comment No. 1498 Section No. 706.34(C) submitted
Public Comment No. 1539 Section No. 706.35 submitted
Public Comment No. 1197 Section No. 706.42 STEPHEN MCCLUER
Public Comment No. 1554 Section No. 706.43 submitted
Public Comment No. 1565 Section No. 706.44 submitted
Public Comment No. 752 Section No. 708.24(E) JOHN MASARICK
Public Comment No. 1174 Article 712 Timothy Croushore
Public Comment No. 1675 Article 712 submitted
Public Comment No. 1374 Section No. 712.2 submitted
Public Comment No. 1016 Section No. 712.4 PHIL UNDERCUFFLER
Public Comment No. 1086 Section No. 712.25(A) MARVIN HAMON
Public Comment No. 839 Section No. 712.25(B) Andrew Yip
Public Comment No. 1628 Section No. 712.25(B) submitted
Public Comment No. 1017 Section No. 712.34 PHIL UNDERCUFFLER
Public Comment No. 1019 Section No. 712.37 PHIL UNDERCUFFLER
Public Comment No. 1662 Section No. 712.38 submitted
Public Comment No. 841 Section No. 712.40(B) Andrew Yip
Public Comment No. 1021 Section No. 712.40 PHIL UNDERCUFFLER
Public Comment No. 841 Section No. 712.40(B) Andrew Yip
Public Comment No. 1022 Section No. 712.55(A) PHIL UNDERCUFFLER
Public Comment No. 1684 Section No. 712.57 submitted
Public Comment No. 1375 Section No. 712.70 submitted
Public Comment No. 1645 Section No. 712.72 submitted
10/6/2015 National Fire Protection Association Report
Public Comment No. 1063NFPA 702015 [ Global Input ]
Article 100 Definitions
Voltage, Nominal…..
Informational Note No. 3: Certain 48volt 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
DC or 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 Volts AC. 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 AC shall 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 AC or more shall be permitted only as in (1) and (2).
Article 215 Feeders
215.12(C)(2) Feeders Supplied from DirectCurrent 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
DC or 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 AC to 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 DC to ground shall not be exposed to accidental contact where accessible to
unquali?ed persons.
Article 460 Capacitors
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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 DC or 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 2wire dc circuits and
systems 50 volts AC/60 volts DC or 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 deenergizes the electric vehicle connector whenever the electrical connector is
uncoupled from the electric vehicle. An interlock shall not be required for portable
cordandplugconnected 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 50 60 volts dc.
625.19 Automatic DeEnergization of Cable. The electric vehicle supply equipment or
the cableconnector combination of the equipment shall be provided with an automatic
means to deenergize 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 cordandplugconnected 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 50 60 volts dc.
625.44 Electric Vehicle Supply Equipment Connection.
Electric vehicle supply equipment shall be permitted to be cord and plugconnected to the
premises wiring system in accordance with one of the following:
(A) Connections to 125Volt, SinglePhase, 15 and 20Ampere Receptacle Outlets. Electric
vehicle supply equipment intended for connection to nonlocking, 2pole,3wire groundingtype
receptacle outlets rated at 125 V, single phase, 15 and 20 amperes or from a supply of less
than 50 60 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 than 50 60 volts
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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 50 60 Volts 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.
A rticle 720 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 volts direct current or alternating current.
720.11 Mechanical Execution of Work. Circuits operating at less than 50 volts AC
or 60 volts DC shall 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 (CoChair), 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:
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1. Where a code section refers to AC systems only and indicates 50 volts the acronym “AC” was
added to provide clarity.
2. Where a code section refers to a requirement used only in a DC system at a 50 volt threshold, the
voltage is revised to 60 volts and the term “DC” is added
3. Where a code section indicates a 50 volt threshold, and the section is a requirement for both AC
and DC systems, the text is revised as “50 volts AC/60 volts DC”.
4. When a code section refers to DC systems, and the term “nominal” is used, it will be deleted
since the voltage threshold is increased to 60 volts.
5. A fine print note is being recommended in Article 100 below the definition for “Nominal Voltage” to
provide additional information on float voltage.
NEC changes are being recommended for the following code sections:
1. *Add informational note after “Voltage, Nominal”. Informational note to read as follows:*
*Informational Note No. 3: Certain 48volt DC battery units use a charging float voltage up to 58
volts. In DC applications 60 volts is used to cover the entire range of float voltages.*
2. For section 110.27, “50 volts” is being changed to “50 volts AC/60 volts DC”. This will clarify the
voltage threshold for AC and DC systems.
3. Section 200.7 (B) and (C) applies to conductor marking for AC systems only. “AC” is added after
50 volts to clarify that this requirement is only for AC systems.
4. Section 210.5(C)(2) was revised in the First draft that changed “50 volts” to “60 volts” to correlate
with the new microgrid article. Revise section 215.12(C) from“50 volts” to “60 volts” to correlate with
section 210.5(C)(2).
5. In section 445.14, revise “50 volts” to 50 volts AC/60 volts DC” to clarify that this requirement
pertains to both AC and DC systems.
6. In sections 480.5 and 480.6 “50 volts” was changed to “60 volts” since these pertain to DC
batteries and DC systems.
7. In section 522.25, “50 volts” is being changed to “50 volts AC / 60 volts DC” to clarify that this
section pertains to both AC and DC systems and distinguishes between the two voltage systems
and thresholds.
8. Article 625, Electrical Vehicle Charging System. Revise the text from “50 volts” to“60 volts” since
these are DC systems.
9. Section 669.6(A) and (B) are DC systems. Revise the text from“50 volts” to “60 volts”
10. Section 690.71 (B) is a DC system with a threshold of 50 volts. Revise the text from “50 volts”
to “60 volts DC”.
11. Article 720 Circuits and Equipment Operating at Less Than 50 Volts covers both AC and DC
systems. To correlate the Title has been changed to “50 Volts AC/60 Volts DC”. The Scope 720.1
and section 720.11 have been modified to clarify that this Article applies to both systems with the
corresponding voltage.
Related Item
Public Input No. 3681NFPA 702014 [Global Input]
Submitter Information Verification
Submitter Full Name:Lawrence Ayer
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Description:Fire Protection Research Foundation Requests .. /FormLaunch?id=/TerraView/Content/702014.ditamap/2/C1443033590366.xml&viewmode=nfpa/xslt/nfpaviewmode.xsl. 2/6 Article 430 Motors, Motor Circuits, and Controllers.