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First Revision No. 1-NFPA 79-2016 [ Global Input ]
Subpanel in parenthesis was the only new material added to this definition.
3.3.94 Subplate (Subpanel)
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 17:09:46 EST 2016
Committee Statement
Committee
Statement:
The term "subpanel" is used only once in the definition of "Industrial Control Panel." Adding the
term "subpanel" in parenthesis to the definition of subplate provides correlation with the use of the
term "subpanel" in the definition of "industrial Control Panel". The term "sub-panel" is used only
once in Annex D and does not require any revision as it is used in an example of a bill of materials
entry. The term sub-plate was not found in the standard.
Response
Message:
Public Input No. 93-NFPA 79-2015 [Global Input]
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First Revision No. 16-NFPA 79-2016 [ Global Input ]
DELETE ALL OCCURANCES OF IEEE 315A IN THE STANDARD
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 14:32:42 EST 2016
Committee Statement
Committee
Statement:
IEEE 315A has been superseded by IEEE 315. There are approximately 6 locations where
315A is used.
Response Message:
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First Revision No. 2-NFPA 79-2016 [ Global Input ]
16.2.3.1 The marking shall be located so as to be clearly plainly visible to qualified persons before
examination, adjustment, servicing, or maintenance of the equipment.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 17:19:30 EST 2016
Committee Statement
Committee
Statement:
The only instance of “clearly visible” in the standard occurs in 16.2.3.1. Changing “clearly visible”
to “plainly visible” in this clause facilitates consistent use of the term “plainly visible” in the
standard.
Response
Message:
Public Input No. 94-NFPA 79-2015 [Global Input]
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First Revision No. 3-NFPA 79-2016 [ Section No. 1.1.1 ]
1.1.1
The provisions of this standard shall apply to the electrical/electronic equipment, apparatus, or systems of
industrial machines operating from a nominal voltage of 600 volts 1000 volts or less, and commencing at
the point of connection of the supply circuit conductors to the electrical equipment of the machine.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 17:54:56 EST 2016
Committee Statement
Committee
Statement:
The proposed change aligns with the change in the 2014 NEC where the voltage range for low
voltage equipment has been increased to 1000V. Also a TG needs to be formed to review all other
locations in the document where 600 V limit appears.and determine if a revision is required.
Sections that contain reference to 600 volts are 1.1.1, 3.3.106, 7.2.10.2, 7.9 11.5 and Table
11.5.1.1.
Response
Message:
Public Input No. 108-NFPA 79-2016 [Section No. 1.1.1]
Public Input No. 153-NFPA 79-2016 [Section No. 1.1.1]
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First Revision No. 4-NFPA 79-2016 [ Chapter 2 ]
Chapter 2 Referenced Publications
2.1 General.
The documents or portions thereof listed in this chapter are referenced within this standard and shall be
considered part of the requirements of this document.
2.2 NFPA Publications.
National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.
NFPA 70®, National Electrical Code®, 2014 2017 edition.
NFPA 70E®, Standard for Electrical Safety in the Workplace®, 2015 edition.
2.3 Other Publications.
2.3.1 ANSI Publications.
American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.
ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .
2.3.2 ASTM Publications.
ASTM International, 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959.
ASTM B 8 B8 , Standard Specification for Concentric-Lay–Stranded Copper Conductors, Hard,
Medium-Hard, or Soft, 2004 2011 .
ASTM B 174 B174 , Standard Specification for Bunch-Stranded Copper Conductors for Electrical
Conductors, 2002 2010, reapproved 2015 .
ASTM B 286 B286 , Standard Specification for Copper Conductors for Use in Hookup Wire for Electronic
Equipment, 2002 2007, reapproved 2012 .
2.3.3 IEC Publications.
International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,
Switzerland.
IEC 60072–1, Dimensions and output series for rotating electrical machines — Part 1: Frame numbers 56
to 400 and flange numbers 55 to 1080, 1991-03 .
IEC 60072–2, Dimensions and output series for rotating electrical machines — Part 2: Frame numbers
355 to 1000 and flange numbers 1180 to 2360, 1990-12 .
Global FR-16
2.3.4 IEEE Publications.
IEEE, Three 3 Park Avenue, 17th Floor, New York, NY 10016-5997.
IEEE 315 /315A , Graphical Symbols for Electrical and Electronics Diagrams (Including Reference
Designation Letters), 1993.
2.3.5 NEMA Publications.
National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , Rosslyn Arlington ,
VA 22209.
NEMA ICS 2, Industrial Control and Systems: Controllers, Contactors, and Overload Relays Rated
600 Volts, 2000, Revised 2004 errata 2008 .
NEMA MG-1, Motors and Generators, 2003 2014 .
NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .
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2.3.6 UL Publications.
Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.
ANSI/UL 50 UL50 , Standard for Enclosures for Electrical Equipment, 2007, revised 2012 .
ANSI/UL 50E UL50E , Standard for Electrical Equipment, Environment Considerations, 2007, revised
2012 .
ANSI/UL 508 UL508 , Standard for Industrial Control Equipment, 1999, revised 2010 2013 .
UL 508A UL508A , Standard for Industrial Control Panels, 2001, revised 2010 2014 .
ANSI/UL 870 UL870 , Standard for Wireways, Auxiliary Gutters and Associated Fittings, 2008, revised
2013 .
ANSI/UL 1063 UL1063 , Standard for Machine-Tool Wires and Cables, 2006, revised 2012 .
ANSI/UL 1581 UL1581 , Reference Standard for Electrical Wires, Cables and Flexible Cords, 2001,
revised 2011 2015 .
2.3.7 U.S. Government Publications.
U.S. Government Printing Publishing Office, 732 North Capitol Street, NW, Washington, DC
20402 20401-0001 .
Title 29, Code of Federal Regulations, Part 1910.331–335, “Safety-Related Work Practices.”
2.3.8 Other Publications.
Merriam-Webster’s Collegiate Dictionary, 11th edition, Merriam-Webster, Inc., Springfield, MA, 2003.
2.4 References for Extracts in Mandatory Sections.
NFPA 70®, National Electrical Code®, 2014 2017 edition.
NFPA 70E®, Standard for Electrical Safety in the Workplace®, 2015 edition.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 18:08:36 EST 2016
Committee Statement
Committee Statement: Referenced current SDO names, addresses, standard names, numbers, and editions.
Response Message:
Public Input No. 1-NFPA 79-2015 [Chapter 2]
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First Revision No. 19-NFPA 79-2016 [ New Section after 3.3.5 ]
3.3.6 Adjustable Speed Drive System.
A combination of an adjustable speed drive, its associated motor(s), and auxiliary equipment. [ 70: 100]
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 16:28:54 EST 2016
Committee Statement
Committee
Statement:
The definition of "adjustable speed drive system" in the 2014 NEC is added as a new section
in Chapter 3 as this term is being added to Chapter 4.
Response
Message:
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First Revision No. 18-NFPA 79-2016 [ Section No. 3.3.5 ]
3.3.5 * Adjustable Speed Drive.
A combination of the power converter, motor, and motor mounted auxiliary devices such as encoders,
tachometers, thermal switches and detectors, air blowers, heaters, and vibration sensors. Power
conversion equipment that provides a means of adjusting the speed of an electric motor. [ 70: 100]
Supplemental Information
File Name
Description
FR-18_A.3.3.5.docx
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 16:19:00 EST 2016
Committee Statement
Committee
Statement:
The definition of "adjustable speed drive" is revised to correlate with the definition in the 2014 NEC.
The annex material for A.3.3.5 is revised to add the text of the Informational Note to the definition of
"adjustable speed drive" in the 2014 NEC at the end of the existing text of A.3.3.5. The definition of
"adjustable speed drive system" in the 2014 NEC is added as a new section in Chapter 3 as this
term is being added to Chapter 4.
Response
Message:
Public Input No. 192-NFPA 79-2016 [Section No. 3.3.5]
Page 8 of 114
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FR‐18, New annex material A.3.3.5 Adjustable Speed Drive. A variable frequency drive is one type of electronic adjustable speed drive that controls the rotational speed of an ac electric motor by controlling the frequency and voltage of the electrical power supplied to the motor. [70:100] Page 9 of 114
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First Revision No. 20-NFPA 79-2016 [ New Section after 3.3.8 ]
3.3.11*
Basic Protection (Protection From Direct Contact).
Protection against electric shock under fault-free conditions.
Supplemental Information
File Name
Description
FR-20_A.3.3.xx_Basic_Protection.docx
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 16:56:44 EST 2016
Committee Statement
Committee
Statement:
The committee accepts the new definition of “basic protection” but adds the term “protection from
direct contact” in parenthesis for historical reference for one revision cycle for a better
understanding of the terms. The committee also accepts the new annex note.
Response
Message:
Public Input No. 104-NFPA 79-2016 [New Section after 3.3.8]
Public Input No. 105-NFPA 79-2016 [New Section after A.3.3.8]
Page 10 of 114
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FR-20, New annex material.
A.3.xx Basic Protection (protection from direct contact).
In previous editions of NFPA 79 the term "protection against direct contact" was used in place
of "basic protection."
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First Revision No. 6-NFPA 79-2016 [ Section No. 3.3.19.4 ]
3.3.21.4* Liquidtight Flexible Nonmetallic Conduit (LFNC).
A raceway of circular cross section of various types as follows: (1) A smooth seamless inner core and
cover bonded together and having one or more reinforcement layers between the core and covers,
designated as Type LFNC-A; (2) A smooth inner surface with integral reinforcement within the raceway
wall, designated as Type LFNC-B; (3) A corrugated internal and external surface without integral
reinforcement within the conduit raceway wall, designated as LFNC-C. [ 70: 356.2]
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 18:58:44 EST 2016
Committee Statement
Committee Statement: Revised this definition as recommended to correlate with the definition in the 2014 NEC.
Response Message:
Public Input No. 193-NFPA 79-2016 [Section No. 3.3.19.4]
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First Revision No. 57-NFPA 79-2016 [ New Section after 3.3.32 ]
3.3.35 Effective Ground-Fault Current Path.
An intentionally constructed, low-impedance electrically conductive path designed and intended to carry
current under ground-fault conditions from the point of a ground fault on a wiring system to the electrical
supply source and that facilitates the operation of the overcurrent protective device or ground-fault
detectors. [ 70: 100]
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 16:27:15 EST 2016
Committee Statement
Committee
Statement:
This term was added in Chapter 8 and adding the definition will help users understand the
term.
Response Message:
Public Input No. 142-NFPA 79-2016 [New Section after 3.3.32]
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First Revision No. 22-NFPA 79-2016 [ New Section after 3.3.42 ]
3.3.46*
Fault Protection (Protection From Indirect Contact).
Protection against electric shock under single-fault conditions.
Supplemental Information
File Name
Description
FR-23_A.3.3.yy_Fault_Protection.docx
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 17:12:52 EST 2016
Committee Statement
Committee
Statement:
The committee accepts the new definition of the term “fault protection” but adds the term
“protection from indirect contact” for historical reference for one revision cycle for a better
understanding of the terms. The committee also accepts the new annex note.
Response
Message:
Public Input No. 103-NFPA 79-2016 [New Section after 3.3.42]
Public Input No. 106-NFPA 79-2016 [New Section after A.3.3.42]
Page 14 of 114
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FR‐23, New annex material A.3.yy Fault Protection (protection from indirect contact).
In previous editions of NFPA 79 the term "protection against indirect contact" was used in place
of "fault protection".
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First Revision No. 12-NFPA 79-2016 [ Section No. 3.3.64.2 ]
3.3.68.2 Wet Location.
Installations underground or in concrete slabs or masonry in direct contact with the earth; and in locations
subject to saturation with water or other liquids, such as vehicle washing areas; and in unprotected
locations exposed to weather. [70:100]
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 13:19:55 EST 2016
Committee Statement
Committee
Statement:
Revise this definition of "wet location" by removing the word "and" and retain the definition of
"dry location" as recommended to correlate with the definitions in the 2014 NEC.
Response
Message:
Public Input No. 195-NFPA 79-2016 [Sections 3.3.64.2, 3.3.64.2]
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First Revision No. 10-NFPA 79-2016 [ New Section after 3.3.106 ]
3.3.110 Visible, Plainly.
Able to be seen without the movement or unmounting of surrounding equipment.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 11:50:53 EST 2016
Committee Statement
Committee
Statement:
The term “plainly visible” is used throughout the standard and its definition will assist in
providing accurate interpretations and applications of requirements involving the use of this term.
Response
Message:
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First Revision No. 13-NFPA 79-2016 [ Chapter 4 [Title Only] ]
General Requirements and Operating Conditions
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 13:27:20 EST 2016
Committee Statement
Committee Statement: The revised title more accurately reflects the material covered in Chapter 4.
Response Message:
Public Input No. 109-NFPA 79-2016 [Chapter 4 [Title Only]]
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First Revision No. 17-NFPA 79-2016 [ New Section after 4.3.2.7 ]
4.3.2.8 Circuits Supplied From Power Conversion Equipment.
Electrical conductors and equipment supplied by power conversion equipment as part of adjustable
speed drive systems and servo drive systems shall be selected based on the electrical power
characteristics involved and the equipment manufacturer’s instructions.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 16:08:30 EST 2016
Committee Statement
Committee
Statement:
The switching in the output circuits of power conversion equipment can create electrical power
characteristics and abnormalities such as recurring voltage peaks (reflected wave), common mode
noise, and frequency effects. These can adversely affect electrical equipment that is not intended to
operate under these conditions. Specific mitigation methods can be recommended by the
manufacturer. The proposed text ensures proper consideration for equipment selection and
application in these circuits.
Response
Message:
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First Revision No. 14-NFPA 79-2016 [ Section No. 4.4.2 ]
4.4.2 * Electromagnetic Compatibility (EMC).
Transient suppression, isolation, or other appropriate means shall be provided where the equipment of an
industrial machine generates electrical noise or transients, which can affect the operation of equipment.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 13:37:13 EST 2016
Committee Statement
Committee
Statement:
The proposed revision restricts the requirement for inclusion of noise suppression techniques to
only prevent adverse conditions to the machine producing or receiving the noise itself. The effects
on other equipment within the surrounding area must be considered but the machine is not required
to have noise suppression for other such equipment.
Response
Message:
Public Input No. 155-NFPA 79-2016 [Section No. 4.4.2]
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First Revision No. 15-NFPA 79-2016 [ Section No. 4.8 ]
4.8 Available Fault Current.
The available fault current at the point of the supply to the each industrial control panel of a machine shall
not be greater than the short-circuit current rating marked on the industrial control panel nameplate.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 14:02:42 EST 2016
Committee Statement
Committee
Statement:
The revised text provides clarification for machines with more than one source of supply and/or
control panels. The committee agrees with the submitted substantiation as it is current practice
where more than one source of supply is present.
Response
Message:
Public Input No. 101-NFPA 79-2016 [Section No. 4.8]
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First Revision No. 25-NFPA 79-2016 [ Chapter 5 [Title Only] ]
Incoming Supply Circuit Conductor Terminations and Devices for Disconnecting and Removing
Power Means
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 19:18:40 EST 2016
Committee Statement
Committee
Statement:
The title of Chapter 5 is excessively long and does not very well describe the Chapter. The term
supply circuit includes the concept of being "incoming" and the term "disconnecting means"
includes the concept of "removing power".
Response
Message:
Public Input No. 130-NFPA 79-2016 [Chapter 5 [Title Only]]
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First Revision No. 24-NFPA 79-2016 [ Section No. 5.3 ]
5.3 Supply Circuit Disconnecting (Isolating) Means.
5.3.1 General.
The following general requirements apply to 5.3.2 through 5.3.5.
5.3.1.1
A supply circuit disconnecting means shall be provided for the following:
(1) Each incoming supply circuit connecting to a machine
(2) The Each supply circuit connecting to a feeder system using collector wires, collector bars, slip-ring
assemblies, or flexible cable systems (reeled, festooned) to a machine or a number of machines
(3) Each on-board power source (e.g., generators, uninterruptible power supplies)
Exception: Communication, remote control, and signaling circuits of less than 50 volts shall not be
required to be provided with a supply circuit disconnecting means.
5.3.1.1.1*
Each disconnecting means required by 5.3.1.1 shall be legibly marked to indicate the equipment it
disconnects.
5.3.1.1.2
A main disconnecting means shall be marked as main if multiple disconnecting means are supplied from
the main disconnecting means.
5.3.1.1.3
Where a machine is supplied by more than one supply circuit, a marking shall be installed at each supply
circuit disconnect location denoting the location of all other supply circuit disconnects.
5.3.1.2
The supply circuit disconnecting means shall disconnect (isolate) the electrical equipment of the machine,
including all control circuits, from the supply circuit when required (e.g., for work on the machine, including
the electrical equipment). Circuits that are not required to be disconnected by the supply circuit
disconnecting means shall comply with 5.3.5.
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5.3.1.3
Each supply circuit disconnecting means other than attachment plugs and receptacles shall be mounted
within the control enclosure or immediately adjacent thereto.
Exception No. 1: Externally mounted supply circuit disconnecting means, whether interlocked or not
interlocked with the control enclosure, supplying machines totaling 2 hp or less shall be permitted to be
mounted up to 6 m (20 ft) away from the control enclosure, provided the control enclosure is marked to
indicate the location of the disconnecting means is in sight from and readily accessible to the
operator. the disconnecting means complies with all the following:
(1) Is in sight of the control enclosure it supplies
(2) Is readily accessible
(3) Is marked in accordance with 5.3.1.1.1
Exception No. 2: A supply circuit disconnecting means mounted in a separate enclosure and interlocked
in accordance with 6.2.3.1 6.2.4 with the control enclosure(s) it supplies shall be permitted to be
mounted up to 6 m (20 ft) away, provided the disconnecting means is in sight from the control
enclosure(s) and readily accessible to the operator. The , provided the control enclosure(s) shall be is
marked indicating to indicate the location of the disconnecting means. The and the disconnecting
means shall be marked indicating complies with all the industrial machine it supplies. following:
(1) Is in sight of the control enclosure it supplies
(2) Is readily accessible
(3) Is marked in accordance with 5.3.1.1.1
5.3.1.4
Each supply circuit disconnecting means mounted within or adjacent to the control enclosure shall be
interlocked with the control enclosure in accordance with 6.2.3.1 6.2.4 .
Exception: An interlock within the control enclosure shall not be required where the use of a key or tool
is required for opening the supply circuit disconnecting means enclosure to access exposed live parts.
A safety sign shall be provided in accordance with Section 16.2 .
Exception: Where a supply circuit disconnecting means, supplying machines totaling 2 hp or less is not
located within or adjacent to the control enclosure it supplies, the control enclosure shall comply with
6.2.3.1 6.2.4 or 6.2.3.2 6.2.5 . Where a supply disconnecting means is an attachment plug and
receptacle, the control enclosure it supplies shall comply with 6.2.3.2 6.2.5 . Where compliance
with 6.2.3.2 6.2.5 is used required , a safety sign shall be provided in accordance with Section 16.2 .
5.3.1.5
Where two or more disconnecting means are provided within the control enclosure for multiple supply
circuits, they shall be grouped in one location where practicable. Protective interlocks for their correct
operation shall be provided where a hazardous condition or damage to the machine or to the work in
progress can occur.
5.3.2 Type.
The supply circuit disconnecting device shall be one of the following types:
(1) A listed motor circuit switch (switch disconnector) rated in horsepower
(2) A listed molded case circuit breaker
(3) A listed molded case switch
(4) An instantaneous trip circuit breaker that is part of a listed combination motor controller limited to
single motor applications
(5) A listed self-protected combination controller limited to single motor applications
(6) An attachment plug and receptacle (plug/socket combination) for cord connection
5.3.3 Requirements.
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5.3.3.1*
Where the supply circuit disconnecting device is one of the types in 5.3.2(1) through 5.3.2(5) , the device
shall fulfill all of the following requirements:
(1) Isolate the electrical equipment from the supply circuit and have one off (open) and one on (closed)
position only. Circuit breakers, instantaneous trip circuit breakers, molded-case switches, and
self-protected combination motor controllers are permitted to have a reset (tripped) position between
off (open) and on (closed).
(2) Have an external operating means (e.g., handle) that complies with 5.3.4.
Exception: Power-operated switchgear need not be operable from outside the enclosure where
there are other means to open it.
(3) Be provided with a permanent means permitting it to be locked in the off (open) position only (e.g., by
padlocks), independent of the door or cover position. When so locked, , that also prevents remote
as well as local closing shall be prevented into the (on) position .
(4) Simultaneously disconnect all ungrounded conductors of the power supply circuit.
(5) Be operable, by qualified persons, independent of the door or cover position without the use of
accessory tools or devices.
(6) Be rated for the application as follows:
(a) The With an ampere rating shall be at least 115 percent of the sum of the full-load currents
required for all equipment that is in operation at the same time under normal conditions of use.
(b) Where rated in horsepower, the with a horsepower rating shall be at least equal to that which is
defined by Table 430.251(B) of NFPA 70, for a locked rotor current equal to the largest sum
resulting from the locked rotor currents of any combination of motors that can be started
simultaneously and the full-load currents of the remaining motor and non-motor loads that can
be operated at that time.
(c) The With a voltage rating shall be at least equal to the nominal supply circuit voltage.
(7) The disconnecting means shall Be of a type that plainly indicate indicates whether it is in the off
( open(off ) or on ( closed) position.
5.3.3.2*
When the supply circuit disconnecting device is an attachment plug and receptacle (plug/socket
combination), it shall fulfill all of the following requirements:
(1) Have a load-break rating or be interlocked with a switching device that is load-break rated and
complies with 5.3.3.1(6). An attachment plug and receptacle (plug/socket combination) rated greater
than 20 amperes or 2 hp shall be listed as a switch-rated plug and receptacle (plug/socket
combination).
(2) Be listed as a switch-rated plug and receptacle (plug/socket combination) rated greater than 20
amperes or 2 hp
(3) Be of such a type and be so installed as to prevent unintended contact with live parts at any time,
even during insertion or removal of the connectors.
(4) Have a first-make, last-break electrical grounding contact.
(5) Have a retaining means to prevent unintended or accidental disconnection where rated at more than
20 amperes.
(6) Be located within sight from the operator station and be readily accessible.
5.3.3.3
In addition to the requirements in 5.3.3.2, an additional switching device on the machine shall be provided
for routine power switching operations of the machine on and off.
5.3.4 Operating Handle.
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5.3.4.1
The center of the grip of the operating handle of the disconnecting means, when in its highest position,
shall be not more than 2.0 m (6 ft 7 in.) above the servicing level. A permanent operating platform, readily
accessible by means of a permanent stair or ladder, shall be considered the servicing level for the
purpose of this requirement.
5.3.4.2
An operating handle of the disconnecting means required by 5.3.3.1 shall meet the following criteria:
(1) Be readily accessible with doors in the open or closed position
(2) Maintain the environmental rating of the enclosure to the degree necessary for the application when
installed through the control enclosure
(3) Not be restricted by the enclosure door when the door is in the open position
5.3.5 Excepted Circuits.
5.3.5.1
The following circuits shall not be required to be disconnected by the main supply circuit disconnecting
means:
(1) Lighting circuits for lighting needed during maintenance or repair
(2) Attachment plugs and receptacles (plug and socket outlets) for the exclusive connection of repair or
maintenance tools and equipment (e.g., hand drills, test equipment)
(3) Undervoltage protection circuits that are only used for automatic tripping in the event of supply circuit
failure
(4) Circuits supplying equipment that are required to remain energized for satisfactory operation [e.g.,
temperature-controlled measuring devices, product (work in progress) heaters, program storage
devices] , inputs, non-motion outputs, and displays]
5.3.5.2
The supply circuits for excepted circuits shall be provided with all of the following:
(1) A disconnecting means, isolating transformer, and overcurrent protection mounted in an enclosure
adjacent to the main control enclosure or within the control enclosure, adjacent to the main supply
circuit disconnecting means.
(2) Line side (of the supply circuit disconnect) supply circuit conductors, when internal to the control
enclosure, that are separate from and do not share a raceway with other conductors and that are
encased in rigid or flexible conduit if longer than 460 mm (18 in.)
5.3.5.3
The control interlocking circuits shall be capable of being disconnected at the control panel from which
they are sourced.
5.3.5.4
Where the excepted circuits are not disconnected by the supply circuit disconnecting means, all of the
following requirements shall be met:
(1) Permanent safety sign(s), shall be placed adjacent to the supply circuit disconnecting operating
handle(s), indicating that it does not de-energize all exposed live parts when it is in the open (off)
(isolated) position as in 16.2.4.
(2) A statement containing the information from 16.2.4 shall be included in the machine documentation.
(3) A permanent safety sign shall be placed on a nonremovable part inside the control enclosure in
proximity to each excepted circuit, or shall be identified by color as defined in 13.2.4.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
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Organization:
http://submittals.nfpa.org/TerraViewWeb/ContentFetcher?commentPara...
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 18:23:09 EST 2016
Committee Statement
Committee
Statement:
The terms “incoming” and “supply” are redundant. “Supply” is the more common of the two and is
maintained for consistency with the remainder of the standard.
5.3.1.1.1. If a single main disconnecting means is provided on the supply side of multiple
disconnecting means it needs to be marked to describe its purpose to differentiate it from the other
disconnecting means, so that it can be operated to de-energize all supply conductors. The additional
requirement would apply only if a single main is provided and only adds a marking requirement. The
language in Annex A indicates that it is necessary but that is not enforceable.
5.3.1.3 reformatted for readability. The reference to the disconnect to be readily accessible to the
operator in Exception No. 1 has been removed because the operator has access to an emergency
stop and operating the disconnect during normal operation could create a safety concern.
5.3.1.4 New exception is added that provides another option that meets an equivalent control as the
existing requirement.
Language added to 5.3.2 (4) to correlate with (5).
Language added to 5.3.3.1 (1) to correlate with 5.3.2 and because the generic term “circuit breaker”
implies inverse time and some users have taken this to mean that instantaneous trip circuit breakers
are not included.
5.3.5.1 Item (4) is revised to correlate with other rules such as the exception to 9.1.1.4.
5.3.3.1 Stating that the disconnect must be interlocked with the door limits the requirement to
enclosures utilizing doors. New technology equipment is utilizing removable covers (not hinged
doors) so clarifying this requirement includes both doors and covers improves the intended safety
afforded by this required interlocking.
Response
Message:
Public Input No. 157-NFPA 79-2016 [Section No. 5.3.1.3]
Public Input No. 187-NFPA 79-2016 [Section No. 5.3]
Public Input No. 134-NFPA 79-2016 [Section No. 5.3.1.1.1]
Public Input No. 188-NFPA 79-2016 [Section No. 5.3.3.1]
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First Revision No. 28-NFPA 79-2016 [ Chapter 6 ]
Chapter 6 Protection from Electrical Hazards
6.1* General.
Electrical equipment shall provide basic protection of (see Sections 6.2 and 6.4 ) and fault protection
(see Sections 6.3 and 6.4 ) to persons from electric shock, from direct and indirect contact, and warn
of potential arc-flash hazards .
6.2 Basic Protection Against Direct Contact .
Live parts operating at 50 volts rms ac or 60 volts dc or more shall be guarded against contact.
6.2.1 General.
The basic protection (see 3.3.11 ) requirements of 6.2.2 or 6.2.3 shall be applied to live parts
operating at 50 volts rms ac or 60 volts dc or more.
6.2.2 Protection by Insulation of Live Parts.
Live parts protected by insulation shall be completely covered with insulation that can only be removed
by destruction. Such insulation shall be capable of withstanding the mechanical, chemical, electrical,
and thermal stresses to which the insulation is subjected under normal operating conditions. Paints,
varnishes, lacquers, and similar products shall not be considered protection against electric shock under
normal operating conditions.
6.2.2.1
Live parts protected by insulation shall be completely covered with insulation that can only be removed by
destruction.
6.2.2.2
Such insulation as described in 6.2.2.1 shall be capable of withstanding the mechanical, chemical,
electrical, and thermal stresses to which the insulation is subjected under normal operating conditions.
6.2.2.3
Paints, varnishes, lacquers, and similar products shall not be considered protection against electric shock
under normal operating conditions.
6.2.3 Protection by Enclosures.
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Equipment enclosures and enclosure openings shall meet the requirements of ANSI/ UL 508, UL 508A,
ANSI/ UL 50, or NEMA 250. (See Figure 6.2.3 .)
Figure 6.2.3 Jointed Test Finger.
Exception: In the absence of a rated enclosure, the determination of the suitability of an enclosure as
protection from electrical shock shall be determined by using a test finger as described in Figure 6.2.3.
The test finger shall be applied, with only minimal force, in every opening in the enclosure after removal
of all parts of the enclosure that are capable of being removed without the use of a tool. The test finger
shall not encounter live parts in any direction.
6.2.3.1 Enclosure Interlocking.
When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a control enclosure
that contains live parts operating at 50 volts ac (rms value) or 60 volts dc or more shall be mechanically or
electrically interlocked, or both, with the control enclosure doors so that none of the doors open unless the
power is disconnected. Interlocking shall be reactivated automatically when all the doors are closed.
Exception No. 1: A disconnecting means used only for maintenance lighting circuits within control
enclosures shall not be required to be interlocked with the control enclosure. A safety sign shall be
provided that meets the requirements of 16.2.4.
Exception No. 2: A disconnecting means used for power supply circuits within control enclosures to
memory elements and their support logic requiring power at all times to maintain information storage
shall not be required to be interlocked with the control enclosure doors. A safety sign shall be provided
that meets the requirements of 16.2.4.
6.2.3.1.1*
Means shall be permitted to be provided for qualified persons, using appropriate work practices, to gain
access without removing power.
6.2.3.1.2
The interlocking means shall meet the following requirements:
(1) Utilize a device or tool as specified by the manufacturer of the interlock to allow qualified persons to
defeat the interlock
(2) Be reactivated automatically when the door(s) is closed
(3) Prevent closing of the disconnecting means while the door of the enclosure containing the
disconnect is open, unless an interlock is operated by deliberate action
6.2.3.1.3
Where provided with a defeat mechanism as permitted in 6.2.3.1.2(1) , live parts mounted on the inside of
doors that are operating at over 50 volts shall be protected from unintentional direct contact by the
inherent design of components or the application of barriers or obstacles such that a 50 mm (2 in.) sphere
cannot contact any of the live parts in question.
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6.2.3.2 Enclosure Access.
When a qualified person, using appropriate work practices, needs to enter an enclosure that does not
have a disconnect, one of the following conditions shall be met:
(1) The use of a key or tool shall be required for opening the enclosure.
(2) An enclosure door shall be permitted to be opened without the use of a key or a tool and without
disconnection of live parts only when all live parts inside are separately enclosed or guarded such
that there cannot be any direct contact with live parts.
6.2.4 Direct Contact from Outside an Enclosure.
6.3 Fault Protection Against Electric Shock from Indirect Contact (Fault Conditions) .
6.3.1 * General.
Protection against indirect contact Fault protection (see 3.3.46) is intended to preventing hazardous
conditions to continue in the event of a fault condition (e.g., an insulation failure fault between live and
exposed conductive parts shall be provided ) .
6.3.1.1 Protection Against Indirect Contact.
Protection against indirect contact shall be achieved by the following For each circuit part or part of the
electrical equipment, at least one of the following measures shall be applied :
(1) Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation
(see 6.3.2), or
(2) Automatic disconnection of the supply (interruption of one or more of the ungrounded conductors
affected by the automatic operation of a protective device in case of a fault) (see
6.3.2.3 6.3.2.36.3.3 ).
6.3.2 Protection by Double Insulation.
Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be
as follows:
Protection by use of double insulation is intended to prevent the occurrence of hazardous touch
voltages on the accessible parts through a failure in the basic insulation.
When this means is used to prevent a hazardous touch voltage, the equipment shall be listed to be
protected by a system of double insulation, or its equivalent. Where such a system is employed,
the equipment shall be distinctively marked.
6.3.2.1
Measures to prevent the occurrence of a hazardous touch voltage by means of double insulation shall be
as follows: Protection by use of double insulation is intended to prevent the occurrence of hazardous
touch voltages on the accessible parts through a failure in the basic insulation.
6.3.2.2
When this the means described in 6.3.2.1 is used to prevent a hazardous touch voltage, the equipment
shall be distinctively marked and shall be listed to be protected by a system of double insulation, or its
equivalent. Where such a system is employed, the equipment shall be distinctively marked.
6.3.2.3 Protection by Automatic Disconnection of Supply.
Automatic disconnection of the supply of any circuit affected by the particular circuit overcurrent protective
device in the event of a fault is intended to shall prevent an exposure to a continuous hazardous touch
voltage. These protective measures shall comprise both of the following:
(1) Protective bonding of exposed conductive parts (see 8.2.3)
(2) The use of overcurrent protection devices for the automatic disconnection of the supply in the event
of a fault
6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits .
6.4.1 General Requirements.
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6.4.1.1
The use of PELV, as described in Section 6.4, is to shall protect persons against electric shock from
indirect contact and limited area direct contact.
6.4.1.2
Class 2 circuits, as covered in 13.1.1 and Article 725 of NFPA 70 (NEC), shall be permitted to be
used to provide protection from electric shock and other hazards.
6.4.2
PELV circuits shall satisfy all of the following conditions:
(1) The nominal voltage shall not exceed the following:
(a) 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is used in normally dry
locations and when large area contact of live parts with the human body is not expected
(b) 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases
(2) One side of the circuit or one point of the source of the supply of that circuit shall be connected to the
equipment grounding circuit.
(3) Live parts of PELV circuits shall be electrically separated from other live circuits. Electrical separation
shall be not less than that required between the primary and secondary circuits of a safety isolating
transformer.
(4) Conductors of each PELV circuit shall be physically separated from those of any other circuit. When
this requirement is impracticable, the insulation provisions of 13.1.3 shall apply.
(5) Attachment plugs and receptacles (plugs and socket combinations) for a PELV circuit shall conform
to the following:
(a) Attachment plugs (plugs) shall not be able to enter receptacles (socket-outlets) of other voltage
systems.
(b) Receptacles (socket-outlets) shall not admit plugs of other voltage systems.
6.4.3 Sources for PELV.
The source for PELV shall be one of the following:
(1) A safety isolating transformer
(2) A source of current providing a degree of safety equivalent to that of the safety isolating transformer
(e.g., a motor generator with winding providing equivalent isolation)
(3) An electrochemical source (e.g., a battery) or another source independent of a higher voltage circuit
(e.g., a diesel-driven generator)
(4) An identified electronic power supply conforming to standards specifying measures to be taken to
ensure that, even in the case of an internal fault, the voltage at the outgoing terminals does not
exceed the values specified in 6.4.2(1)
6.5 Protection Against Residual Voltages.
6.5.1
Live parts having a residual voltage greater than 60 volts after the supply has been disconnected shall be
reduced to 60 volts or less within 5 seconds after disconnection of of disconnecting the supply voltage.
Exception No. 1: Exempted from this requirement are components Components having a stored charge
of 60 microcoulombs or less shall be exempt from this requirement .
Exception No. 2: Where such a provision would interfere with the functioning of the equipment, a durable
safety sign drawing that draws attention to the hazard and stating states the delay required before entry
to the enclosure is allowed shall be displayed at an easily a plainly visible location on or immediately
adjacent to the enclosure containing the capacitance.
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6.5.2
The withdrawal of plugs or similar devices, which results in the exposure of conductors (e.g., pins), shall
have a discharge time that does not exceed 1 second.
Exception No. 1: Exempted from this requirement are components having a stored charge of
60 microcoulombs or less.
Exception No. 2: Exempted from this requirement are conductors that are protected against direct
contact.
6.5.3 Discharge of Stored Energy.
Capacitors shall be provided with a means of discharging stored energy. [70:460.6]
6.5.3.1 Time of Discharge.
The residual voltage of a capacitor shall be reduced to 50 volts, nominal, or less, within 1 minute after the
capacitor is disconnected from the source of supply. [70:460.6(A)]
6.5.3.2 Means of Discharge.
The discharge circuit shall be either permanently connected to the terminals of the capacitor or capacitor
bank, or provided with automatic means of connecting it to the terminals of the capacitor bank on removal
of voltage from the line. Manual means of switching or connecting the discharge circuit shall not be used.
[70:460.6(B)]
6.6 Arc Flash Hazard Warning.
A safety sign shall be provided in accordance with 16.2.3.
Supplemental Information
File Name
Description
FR-28_Ch_6_Annex_changes.docx
79-FR-28_Chapter_6_editorial_revisions.docx
For committee use
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 09:14:29 EST 2016
Committee Statement
Committee To maintain consistency with IEC 60204-1 and other IEC standards, the section is revised to use the
Statement: terms “Basic Protection” and “Fault Protection” as they are not in conflict with NEC terms. The IEC
terminology “protection against direct contact” has been replaced with “basic protection” and the term
“protection against indirect contact” has been replaced with “fault protection”. The revised language
aligns NFPA 79 with similar language in Ed. 6 of IEC 60204-1.The revised text retains the use of the
term “Live parts” in section 6.2.1 for consistency within NFPA 79 and the NEC.
Renumbering of 6.1 – 6.3 was done to correct editorial errors and group "enclosure" related
requirements together.
The phrase “and warn of potential arc-flash hazards” was removed because Chapter 16 contains the
requirements for markings and signs.
Figure 6.2.3 was retained as normative requirements cannot be located in an informative annex.
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Class 2 circuits have a long history of acceptable use without additional shock barriers in the NEC
and now specifically addressed in NFPA 79. There is no reason they should not be allowed to be
used for industrial machinery as protection from shock.
Annex
Deleting A.6.2--Voltage levels permitted in other countries may vary from those indicated.
Moving A.6.2.4.1 to A.6.2.3.1.1--PI162 moved reference section.
Moving A.6.3.1.1 to A.6.3.1--PI162 moved reference section.
Response
Message:
Public Input No. 185-NFPA 79-2016 [Section No. A.6.2.4.1]
Public Input No. 184-NFPA 79-2016 [Section No. A.6.2]
Public Input No. 162-NFPA 79-2016 [Chapter 6]
Public Input No. 186-NFPA 79-2016 [Section No. A.6.3.1.1]
Public Input No. 137-NFPA 79-2016 [Section No. 6.1]
Public Input No. 97-NFPA 79-2015 [Section No. 6.2]
Public Input No. 143-NFPA 79-2016 [Section No. 6.4]
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FR-28, annex material changes
A.6.2
Outside the USA the voltage is limited to 30 volts rms ac or 60 volts dc ripple-free.
A.6.2.4.1 A.6.2.3.1.1
See NFPA 70E, for additional information on work practices.
A.6.3.1.1 A.6.3.1
Ripple-free is conventionally defined for a sinusoidal ripple voltage as a ripple content of not
more than 10 percent rms. For additional information on isolating transformers, refer to IEC
60742 and IEC 61558-1. In addition, the following measures need to be considered:
1. The type of supply and grounding system
2. The impedance values of the different elements of the equipment grounding system
3. The characteristics of the protective devices used to detect insulation failure
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Chapter 6 Protection from Electrical Hazards
6.1* General.
Electrical equipment shall provide basic protection (see Sections 6.2 and 6.4) and fault
protection (see Sections 6.3 and 6.4) of to persons from electric shock by basic
protection (see Sections 6.2 and 6.4) and fault protection (see Sections 6.3 and 6.4).
6.2 Basic Protection.
6.2.1 General.
The basic protection (see 3.3.11) requirements of 6.2.2 or 6.2.3 shall be applied to Live
live parts operating at 50 volts rms ac or 60 volts dc or more, the basic protection (see
3.3.11) requirements of 6.2.2 or 6.2.3 shall be applied.
ORIGINAL: 6.2.2 Protection by Insulation of Live Parts.
Live parts protected by insulation shall be completely covered with insulation that can
only be removed by destruction. Such insulation shall be capable of withstanding the
mechanical, chemical, electrical, and thermal stresses to which the insulation is
subjected under normal operating conditions. Paints, varnishes, lacquers, and similar
products shall not be considered protection against electric shock under normal
operating conditions.
Commented [BS1]: This section was broken up into 3 subsections per MOS. See below for new structure. NEW: 6.2.2 Protection by Insulation of Live Parts.
6.2.2.1
Live parts protected by insulation shall be completely covered with insulation that can
only be removed by destruction.
6.2.2.2
Such insulation as described in 6.2.2.1 shall be capable of withstanding the mechanical,
chemical, electrical, and thermal stresses to which the insulation is subjected under
normal operating conditions.
6.2.2.3
Paints, varnishes, lacquers, and similar products shall not be considered protection
against electric shock under normal operating conditions.
6.2.3 Protection by Enclosures.
Equipment enclosures and enclosure openings shall meet the requirements of
ANSI/UL 508, UL 508A, ANSI/UL 50, or NEMA 250. (See Figure 6.2.3.)
Figure 6.2.3 Jointed Test Finger.
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Exception: In the absence of a rated enclosure, the determination of the suitability of an
enclosure as protection from electrical shock shall be determined by using a test finger
as described in Figure 6.2.3. The test finger shall be applied, with only minimal force, in
every opening in the enclosure after removal of all parts of the enclosure that are
capable of being removed without the use of a tool. The test finger shall not encounter
live parts in any direction.
6.2.3.1 4 Enclosure Interlocking.
When required by 5.3.1.4, each disconnecting means mounted within or adjacent to a
control enclosure that contains live parts operating at 50 volts ac (rms value) or 60 volts
dc or more shall be mechanically or electrically interlocked, or both, with the control
Page 36 of 114
enclosure doors so that none of the doors open unless the power is disconnected.
Interlocking shall be reactivated automatically when all the doors are closed.
Exception No. 1: A disconnecting means used only for maintenance lighting circuits
within control enclosures shall not be required to be interlocked with the control
enclosure. A safety sign shall be provided that meets the requirements of 16.2.4.
Exception No. 2: A disconnecting means used for power supply circuits within control
enclosures to memory elements and their support logic requiring power at all times to
maintain information storage shall not be required to be interlocked with the control
enclosure doors. A safety sign shall be provided that meets the requirements of 16.2.4.
6.2.3.1.1*
Means shall be permitted to be provided for qualified persons, using appropriate work
practices, to gain access without removing power.
6.2.3.1.2
The interlocking means shall meet the following requirements:
1) Utilize a device or tool as specified by the manufacturer of the interlock to allow
qualified persons to defeat the interlock
2) Be reactivated automatically when the door(s) is closed
3) Prevent closing of the disconnecting means while the door of the enclosure
containing the disconnect is open, unless an interlock is operated by deliberate
action
6.2.3.1.3
Where provided with a defeat mechanism as permitted in 6.2.3.1.2(1), live parts
mounted on the inside of doors that are operating at over 50 volts shall be protected
from unintentional direct contact by the inherent design of components or the
application of barriers or obstacles such that a 50 mm (2 in.) sphere cannot contact any
of the live parts in question.
6.2.3.2 Enclosure Access.
When a qualified person, using appropriate work practices, needs to enter an enclosure
that does not have a disconnect, one of the following conditions shall be met:
1) The use of a key or tool shall be required for opening the enclosure.
2) An enclosure door shall be permitted to be opened without the use of a key or a tool
and without disconnection of live parts only when all live parts inside are separately
enclosed or guarded such that there cannot be any direct contact with live parts.
6.3 Fault Protection.
6.3.1* General.
Fault protection (see 3.3.46) is intended to preventpreventing hazardous conditions to
continue in the event of an insulation fault between live and exposed conductive parts
shall be provided).For each circuit part or part of the electrical equipment, at least one of
the following measures shall be applied:
1) Measures to prevent the occurrence of a hazardous touch voltage by means of
double insulation (see 6.3. 2), or
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2) Automatic disconnection of the supply (interruption of one or more of the
ungrounded conductors affected by the automatic operation of a protective device in
case of a fault) (see 6.3. 3).
ORIGINAL: 6.3. 2 Protection by Double Insulation.
Measures to prevent the occurrence of a hazardous touch voltage by means of double
insulation shall be as follows:
Commented [BS2]: This section was revised to comply with MOS. Numbered list was replaced with subsections. See below for new structure. 1) Protection by use of double insulation is intended to prevent the occurrence of
hazardous touch voltages on the accessible parts through a failure in the basic
insulation.
2) When this means is used to prevent a hazardous touch voltage, the equipment shall
be listed to be protected by a system of double insulation, or its equivalent. Where
such a system is employed, the equipment shall be distinctively marked.
NEW: 6.3.2 Protection by Double Insulation.
6.3.2.1
Measures to prevent the occurrence of a hazardous touch voltage by means of double
insulation shall be as follows: Protection by use of double insulation is intended to
prevent the occurrence of hazardous touch voltages on the accessible parts through a
failure in the basic insulation.
6.3.2.2
When thisthe means described in 6.3.2.1is used to prevent a hazardous touch voltage,
the equipment shall be distinctively marked and shall be listed to be protected by a
system of double insulation, or its equivalent. Where such a system is employed, the
equipment shall be distinctively marked.
6.3. 3 Protection by Automatic Disconnection of Supply.
Automatic disconnection of the supply of any circuit affected by the particular circuit
overcurrent protective device in the event of a fault is intended toshall prevent an
exposure to a continuous hazardous touch voltage. These protective measures shall
comprise both of the following:
1) Protective bonding of exposed conductive parts (see 8.2.3)
2) The use of overcurrent protection devices for the automatic disconnection of the
supply in the event of a fault
6.4 Protection by the Use of Protective Extra Low Voltage (PELV) or Class 2 Circuits.
ORIGINAL: 6.4.1 General Requirements.
The use of PELV, as described in Section 6.4, is to protect persons against electric
shock from indirect contact and limited area direct contact. Class 2 circuits as covered
in 13.1.3 and NEC Article 725 shall be permitted to be used to provide protection from
electric shock and other hazards.
Commented [BS3]: This section was broken out into subsections to conform with MOS. See below for new structure. Page 38 of 114
NEW: 6.4.1 General Requirements.
6.4.1.1
The use of PELV, as described in Section 6.4, is toshall protect persons against electric shock from
indirect contact and limited area direct contact.
6.4.1.2
Class 2 circuits, as covered in 13.1.1 and Article 725 of NFPA 70(NEC), shall be permitted to be used to
provide protection from electric shock and other hazards.
6.4.2
PELV circuits shall satisfy all of the following conditions:
1. The nominal voltage shall not exceed the following:
1. 30 volts ac (rms value) or 60 volts dc (ripple-free) when the equipment is
used in normally dry locations and when large area contact of live parts
with the human body is not expected
2. 6 volts ac (rms value) or 15 volts dc (ripple-free) in all other cases
2. One side of the circuit or one point of the source of the supply of that circuit shall
be connected to the equipment grounding circuit.
3. Live parts of PELV circuits shall be electrically separated from other live circuits.
Electrical separation shall be not less than that required between the primary and
secondary circuits of a safety isolating transformer.
4. Conductors of each PELV circuit shall be physically separated from those of any
other circuit. When this requirement is impracticable, the insulation provisions of
13.1.3 shall apply.
5. Attachment plugs and receptacles (plugs and socket combinations) for a PELV
circuit shall conform to the following:
1. Attachment plugs (plugs) shall not be able to enter receptacles (socketoutlets) of other voltage systems.
2. Receptacles (socket-outlets) shall not admit plugs of other voltage
systems.
6.4.3 Sources for PELV.
The source for PELV shall be one of the following:
1. A safety isolating transformer
2. A source of current providing a degree of safety equivalent to that of the safety
isolating transformer (e.g., a motor generator with winding providing equivalent
isolation)
3. An electrochemical source (e.g., a battery) or another source independent of a
higher voltage circuit (e.g., a diesel-driven generator)
4. An identified electronic power supply conforming to standards specifying
measures to be taken to ensure that, even in the case of an internal fault, the
voltage at the outgoing terminals does not exceed the values specified in 6.4.2
(1)
6.5.1
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Live parts having a residual voltage greater than 60 volts after the supply has
been disconnected shall be reduced to 60 volts or less within 5 seconds after
disconnectionof disconnecting of the supply voltage.
Exception No. 1: Components having a stored charge of 60 microcoulombs or
less shall be exempt from this requirementExempted from this requirement are
components having a stored charge of 60 microcoulombs or less.
Exception No. 2: Where such a provision would interfere with the functioning of the
equipment, a durable safety sign drawing that draws attention to the hazard and
stating the delay required before entry to the enclosure is allowed shall be displayed
at a plainly visible location on or immediately adjacent to the enclosure containing
the capacitance.
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First Revision No. 65-NFPA 79-2016 [ Section No. 7.2.10.1 [Excluding any Sub-Sections]
]
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Each motor controller and its associated wiring shall be protected as an individual branch circuit by a
short-circuit protective device (SCPD) as specified by the controller manufacturer. The maximum rating of
the designated SCPD shall be as shown in Table 7.2.10.1 .
Exception No. 1: Table 7.2.10.1 shall not apply to Design B energy efficient motor circuits. The
provisions of NFPA 70 shall be observed for Design B energy efficient motor circuits.
Exception No. 2: Where the controller is an adjustable speed drive that is listed and marked “Suitable for
Output Conductor Protection,” the maximum rating of the designated SCPD shall be determined by
replacing the full-load current in Table 7.2.10.1 with the drive’s rated input current. The SCPD shall not
exceed the rating marked on the adjustable speed drive or in the manufacturer’s instructions.
Table 7.2.10.1 Maximum Rating or Setting of Fuse and Circuit Breakers: Motor, Motor Branch Circuit, and
Motor Controller
Full-Load Current (%)
Fuse Class with Non–Time Delay
AC-2
AC-3
AC-4
R
300
300
300
CF or J
300
300
300
CC
300
300
300
T
300
300
300
Type of Application2
Fuse Class with Time Delay1
AC-2
AC-3
AC-4
RK-53
150
175
175
RK-1
150
175
175
CF or J
150
175
225
CC
150
300
300
Instantaneous trip circuit breaker4
800
800
800
Inverse trip circuit breaker5
150
250
250
Note: Where the values determined by this table do not correspond to the standard sizes or ratings, the
next higher standard size, rating, or possible setting shall be permitted.
1 Where the rating of a time-delay fuse (other than CC type) specified by the table is not sufficient for the
starting of the motor, it shall be permitted to be increased but shall in no case be permitted to exceed
225 percent. The rating of a time-delay Class CC fuse and non–time-delay Class CC, J, CF, or T fuse shall
be permitted to be increased but shall in no case exceed 400 percent of the full-load current.
2 Types of starting duty are as follows:
(a) AC-2: All light-starting duty motors, including slip-ring motors; starting, switching off.
(b) AC-3: All medium starting duty motors including squirrel-cage motors; starting, switching off while
running, occasional inching, jogging, or plugging but not to exceed 5 operations per minute or 10
operations per 10 minutes and all wye-delta and two-step autotransformer starting motors.
(c) AC-4: All heavy starting duty motors including squirrel-cage motors; starting, plugging, inching,
jogging.
3Unless a motor controller is listed for use with RK-5 fuses, Class RK-5 fuses shall be used only with
NEMA-rated motor controllers.
4Instantaneous trip circuit breakers shall be permitted to be used only if they comply with all of the
following:
(a) They are adjustable.
(b) Part of a the combination controller has motor-running protection and also , short-circuit protection,
and ground-fault protection in each conductor.
(c) The combination is especially identified for use.
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(d) It is installed per any instructions included in its listing or labeling.
(e) They are limited to single motor applications, ; circuit breakers with adjustable trip settings are
to shall be set at the controller manufacturer's recommendation, but not greater than 1300 percent of the
motor full-load current.
5Where the rating of an inverse time circuit breaker specified in this table is not sufficient for the starting
current of the motor, it shall be permitted to be increased but in no case exceed 400 percent for full-load
currents of 100 amperes or less or 300 percent for full-load currents greater than 100 amperes.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Fri Mar 11 11:38:23 EST 2016
Committee Statement
Committee
Statement:
Drive technology is capable of providing output conductor short-circuit and ground-fault protection.
There is a UL 61800-5-1 task group developing requirements to investigate and mark a drive for
protecting its output conductors in individual-motor and group installations. This change permits the
use of such a drive to decouple the output conductor sizing from the branch circuit protective device
sizing. This proposal is related to the proposed change to 7.2.10.4(2).
Response
Message:
Public Input No. 164-NFPA 79-2016 [Section No. 7.2.10.1 [Excluding any Sub-Sections]]
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First Revision No. 60-NFPA 79-2016 [ Section No. 7.2.10.4 ]
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7.2.10.4
Two or more motors, or one or more motor(s) and other load(s), and their control equipment shall be
permitted to be connected to a single branch circuit where short-circuit and ground-fault protection is
provided by a single inverse time circuit breaker or a single set of fuses, provided the following conditions
under 7.2.10.4(1) and either 7.2.10.4(2) or 7.2.10.4(3) are met:
(1) Each motor controller and overload device is either listed for group installation with specified
maximum branch-circuit protection or selected such that the ampere rating of the motor branch shortcircuit and ground-fault protective device does not exceed that permitted by 7.2.10.1 for that
individual motor controller or overload device and corresponding motor load.
(2) The rating or setting of the branch short-circuit and ground-fault protection device does not exceed
the values in Table 7.2.10.4 for the smallest conductor in the circuit.
Exception: Where a controller is an adjustable speed drive that is listed and marked “Suitable for
Output Conductor Protection,” the conductors from the drive to the motor shall not apply to
determining the smallest conductor in the circuit. The conductors from the drive to the motor shall
have an ampacity in accordance with Sections 12.5 and 12.6 .
(3) The rating or setting of the branch short-circuit and ground-fault protection does not exceed the value
specified in 7.2.10.1 for the highest rated motor connected to the branch circuit plus an amount
equal to the sum of the full-load current ratings of all other motors and the ratings of other loads
connected to the circuit. Where this calculation results in a rating less than the ampacity of the
branch circuit conductors, it shall be permitted to increase the maximum rating of the fuses or circuit
breaker to a value not exceeding that permitted by Sections 12.5 and 12.6 . Overcurrent protection
for loads other than motor loads shall be in accordance with 7.2.3, 7.2.4 , and 7.2.11. Where
16 AWG or 18 AWG conductors are used for branch circuit conductors or tap conductors under
7.2.10.5 , the rating and type of the branch short-circuit and ground-fault protection shall be in
accordance with 12.6.1 .
Table 7.2.10.4 Relationship Between Conductor Size and Maximum Rating or Setting of Short-Circuit
Protective Device for Power Circuits Group Installations
Maximum Rating
Conductor Size
Fuse or Inverse Time*
(AWG)
Circuit Breaker
(amperes)
18
See footnote.
16
See footnote.
14
60
12
80
10
100
8
150
6
200
4
250
3
300
2
350
1
400
0
500
2/0
600
3/0
700
4/0
800
*Maximum ratings and type of branch short-circuit and ground-fault protective devices for 16 AWG and
18 AWG shall be determined in accordance with 12.6.1.
Submitter Information Verification
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Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 18:56:50 EST 2016
Committee Statement
Committee
Statement:
The listing requirement was added to ensure products were evaluated to the product
standard. The text was reformatted for clarity.
Response
Message:
Public Input No. 163-NFPA 79-2016 [Section No. 7.2.10.4]
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First Revision No. 27-NFPA 79-2016 [ Chapter 8 [Title Only] ]
Grounding and Bonding
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 01 19:56:57 EST 2016
Committee Statement
Committee
Statement:
The concepts in Chapter 8 apply to bonding as much as or more so than grounding. The title
would match that used in the NEC for Article 250.
Response
Message:
Public Input No. 127-NFPA 79-2016 [Chapter 8 [Title Only]]
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First Revision No. 66-NFPA 79-2016 [ Section No. 8.1.2 ]
8.1.2 Connections.
Grounded Except at either the source or first disconnecting means of a grounded separately derived
system, grounded conductors shall not be connected to the equipment grounding circuit, except for
separately derived systems conductor .
Submitter Information Verification
Submitter Full Name: Sonia Barbosa
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 16 12:11:49 EDT 2016
Committee Statement
Committee
Statement:
The rewording of 8.1.2 clarifies that reconnection of the equipment ground to the grounded
conductor after the source of supply to the machine as well as after the first disconnecting means
of a separately derived system is prohibited. This language also correlates with language used in
Article 250 of NFPA 70.
Response
Message:
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First Revision No. 29-NFPA 79-2016 [ Section No. 8.2 ]
8.2 Equipment Grounding Circuit Conductors and Bonding Jumpers .
8.2.1 Grounding Circuit Equipment Parts.
The equipment frame and all non-current-carrying conductive parts, material, or other equipment likely to
become energized shall be bonded together and connected to an equipment grounding circuit conductor
or bonding jumper . shall consist of the following:
Equipment grounding conductor terminal(s)
Equipment grounding conductors and equipment bonding jumpers
Exception: Small parts such as screws, rivets, and nameplates that are not likely to become energized
shall not be required to be grounded.
8.2.1.1 Grounding Circuit Stress Effective Ground Fault Current Path .
All parts of the equipment grounding circuit shall be capable of withstanding the highest thermal and
mechanical stress that can be caused by fault currents flowing in that part of the circuit. All exposed
conductive parts of the electrical equipment and the machine(s) shall be connected to the equipment
grounding circuit All parts of the effective ground fault current path shall be capable of withstanding the
highest thermal and mechanical stress that can be caused by fault currents in that part of the circuit .
8.2.1.2 Equipment Grounding and Bonding .
The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to
be energized shall be effectively grounded. Where electrical devices are mounted on metal mounting
panels that are located within nonmetallic enclosures, the metal mounting panels shall be effectively
grounded. Where specified by the manufacturer, components and subassemblies shall be bonded to the
equipment grounding circuit in accordance with the manufacturer’s instructions.
8.2.1.2.1
The machine and all exposed, non-current-carrying conductive parts, material, and equipment likely to
become energized shall be effectively grounded connected in a manner that provides an effective ground
fault current path .
8.2.1.2.2
Where electrical devices are mounted on metal mounting panels that are located within nonmetallic
enclosures, the metal mounting panels shall be effectively grounded. Where electrical devices are
mounted on metal mounting panels that are located within nonmetallic enclosures, the metal mounting
panels shall be effectively grounded. Where specified by the manufacturer, components and
subassemblies shall be bonded to the equipment grounding circuit in accordance with the manufacturer’s
instructions connected to an equipment grounding conductor or bonding jumper .
8.2.1.2.3
Where specified by the manufacturer, components and subassemblies shall be bonded in accordance
with the manufacturer’s instructions.
8.2.1.3* Equipment Grounding Conductor Terminal.
8.2.1.3.1
For each incoming supply circuit, an equipment grounding conductor terminal shall be provided in the
vicinity of the associated phase conductor terminals and connected to the equipment grounding
conductor .
8.2.1.3.2
All of the items in 8.2.1.2 shall be interconnected to the equipment grounding conductor terminal The
equipment grounding conductor terminal shall accommodate an equipment grounding conductor sized in
accordance with Table 8.2.2.4 .
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8.2.1.3.3
The equipment grounding conductor terminal shall accommodate an equipment grounding conductor
sized in accordance with Table 8.2.2.3 .
8.2.1.3.3*
The equipment grounding conductor terminal shall be identified with the word “GROUND,” the letters
“GND” or “GRD,” the letter “G,” the color GREEN, or the symbol shown in Figure 8.2.1.3.3Figure
8.2.1.3.4 . ; In in addition to the required marking , the letters “ PE” shall also be permitted to identify this
terminal.
Figure 8.2.1.3.3 Grounding Symbol.
8.2.1.3.4
Where an auxiliary grounding electrode is specified, the terminal shall accommodate this additional
grounding electrode conductor.
8.2.2 Equipment Grounding Conductors and Bonding Jumpers.
8.2.2.1
Equipment grounding conductors and bonding jumpers shall be identified in accordance with 13.2.2.
8.2.2.2
Conductors used for grounding and bonding purposes shall be copper.
8.2.2.2.1
Stipulations on stranding and flexing as outlined in Chapter 12 shall apply.
8.2.2.3
Equipment grounding conductors and bonding jumpers shall be insulated, covered, or bare and shall be
protected against physical damage.
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8.2.2.4
Equipment grounding conductors and bonding jumpers of the wire type shall not be smaller than shown in
Table 8.2.2.4 , but shall not be required to be larger than the circuit conductors supplying the equipment.
Table 8.2.2.4 Minimum Size of Equipment Grounding Conductors and Bonding Jumpers
Rating or Setting of Automatic Overcurrent Device in Circuit Ahead of the
Equipment
Copper Conductor
Size
(Not Exceeding Amperes)
(AWG or kcmil)
10
16
15
14
20
12
30
10
40
10
60
10
100
8
200
6
300
4
400
3
500
2
600
1
800
1/0
1000
2/0
1200
3/0
1600
4/0
2000
250
2500
350
3000
400
4000
500
5000
700
6000
800
8.2.3 Continuity of the Equipment Grounding Circuit .
8.2.3.1
The continuity Continuity of the equipment grounding circuit conductors and bonding jumpers shall be
ensured by effective connections through conductors .
8.2.3.2
Removing a device shall not interrupt the continuity of the equipment grounding circuit conductor or
bonding jumper .
8.2.3.3
Bonding of equipment with bolts or other identified means shall be permitted if paint and dirt are removed
from the joint surfaces or the bonded members are effectively penetrated.
8.2.3.4
Raceways, wireways, and cable trays shall not be used as equipment grounding or bonding conductors.
8.2.3.5 Doors or Covers.
8.2.3.5.1
Where electrical devices are mounted on conductive doors or covers, an equipment bonding jumper shall
be installed.
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8.2.3.5.2
Where required, an equipment bonding jumper shall connect the conductive door or cover to the
equipment enclosure or to an equipment grounding terminal within the enclosure.
8.2.3.6
Portable, pendant, and resilient-mounted equipment shall be bonded by separate conductors. Where ;
where multiconductor cable is used, the bonding conductor shall be included as one conductor of the
cable.
8.2.4 * Exclusion of Switching Devices.
The equipment grounding circuit shall not contain any switches or overcurrent protective devices.
Separable connections such as those provided in drawout equipment or attachment plugs and mating
connectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.
First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, and
connectors preclude energization without grounding continuity.
8.2.4.1
The equipment grounding circuit shall not contain any switches or overcurrent protective devices.
8.2.4.2
Separable connections such as those provided in drawout equipment or attachment plugs and mating
connectors and receptacles shall provide for first-make, last-break of the equipment grounding conductor.
8.2.4.3
First-make, last-break shall not be required where interlocked equipment, plugs, receptacles, and
connectors preclude energization without grounding continuity.
8.2.5 Equipment Grounding Conductor Connecting Points.
8.2.5.1
All equipment grounding conductors shall be terminated in accordance with 13.1.1 . The , and the
equipment grounding conductor connecting points shall have no other function.
8.2.5.2*
The equipment grounding conductor connecting points, other than the equipment grounding terminal, shall
be identified by the color GREEN, by the bicolor combination of GREEN-AND-YELLOW, or by use of the
symbol shown in Figure 8.2.1.3.3Figure 8.2.1.3.4 .
Supplemental Information
File Name
Description
79-FR-29_8.2_editorial_revisions.docx
For committee use
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 11:32:10 EST 2016
Committee Statement
Committee Grounding and bonding terms are revised to harmonize with those used in the NEC. The term
Statement: "equipment grounding circuit" was created during the development of NFPA 79, 2002, but is not used
in Article 250 of NFPA 70. This was based on the concept of using an industrial machine frame,
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instead of installing separate equipment grounding conductors or equipment bonding jumpers to
equipment needing an effective ground fault current path. The industrial machine frame is not
permitted to be used this way so this term is not relevant or useful and is creating confusion as the
term circuit typically is associated with current-carrying conductors.
Editorial changes are incorporated for clarity and usability.
The term "incoming" was removed in front of the term "supply" to correlate with other resolutions
taken by the committee in Ch 5.
Response
Message:
Public Input No. 141-NFPA 79-2016 [Section No. 8.2]
Page 53 of 114
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8.2 Equipment Grounding Conductors and Bonding Jumpers.
8.2.1 Equipment Parts. The equipment frame and all non-current carrying conductive
parts, material, or other equipment likely to become energized, shall be bonded together
and connected to an equipment grounding conductor or bonding jumper.
Exception: Small parts such as screws, rivets, and nameplates that are not likely to
become energized shall not be required to be grounded.
8.2.1.1 Effective Ground Fault Current Path. All parts of the effective ground fault
current path shall be capable of withstanding the highest thermal and mechanical stress
that can be caused by fault currents in that part of the circuit.
ORIGINAL: 8.2.1.2 Equipment Grounding and Bonding. The machine and all
exposed, non-current-carrying conductive parts, material, and equipment likely to be
energized shall be connected in a manner that provides an effective ground fault current
path. Where electrical devices are mounted on metal mounting panels that are located
within nonmetallic enclosures, the metal mounting panels shall be connected to an
equipment grounding conductor or bonding jumper. Where specified by the
manufacturer, components and subassemblies shall be bonded in accordance with the
manufacturer’s instructions.
Commented [BS1]: This section was broken into subsections to conform with the MOS. See below for new structure. NEW: 8.2.1.2 Equipment Grounding and Bonding.
8.2.1.2.1
The machine and all exposed, non-current-carrying conductive parts, material, and
equipment likely to become energized shall be connected in a manner that provides an
effective ground fault current path.
8.2.1.2.2
Where electrical devices are mounted on metal mounting panels that are located within
nonmetallic enclosures, the metal mounting panels shall be connected to an equipment
grounding conductor or bonding jumper.
8.2.1.2.3
Where specified by the manufacturer, components and subassemblies shall be bonded
in accordance with the manufacturer’s instructions.
8.2.1.3* Equipment Grounding Conductor Terminal.
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8.2.1.3.1 For each supply circuit, an equipment grounding conductor terminal shall be
provided in the vicinity of the associated phase conductor terminals and connected to
the equipment grounding conductor.
8.2.1.3. 2The equipment grounding conductor terminal shall accommodate an
equipment grounding conductor sized in accordance with Table 8.2.2.3.
8.2.1.3. 3* The equipment grounding conductor terminal shall be identified with the word
“GROUND,” the letters “GND” or “GRD,” the letter “G,” the color GREEN, or the symbol
shown in Figure 8.2.1.3. 3;. In in addition to the required marking, the letters PE shall
also be permitted to identify this terminal.
(Insert Image Here With No Change)
FIGURE 8.2.1.3. 3Grounding Symbol.
8.2.1.3. 4Where an auxiliary grounding electrode is specified, the terminal shall
accommodate this additional grounding electrode conductor.
8.2.2 Equipment Grounding Conductors and Bonding Jumpers.
8.2.2.1 Equipment grounding conductors and bonding jumpers shall be identified in
accordance with 13.2.2.
8.2.2.1 2 Conductors used for grounding and bonding purposes shall be copper.
Stipulations on stranding and flexing as outlined in Chapter 12 shall apply.
8.2.2.2 3 Equipment grounding conductors and bonding jumpers shall be insulated,
covered, or bare and shall be protected against physical damage.
8.2.2.3 4 Equipment grounding conductors and bonding jumpers of the wire type shall
not be smaller than shown in Table 8.2.2.3, but shall not be required to be larger than
the circuit conductors supplying the equipment.
Table 8.2.2.3 Minimum Size of Equipment Grounding Conductors and Bonding
Jumpers
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(Insert Table Here With No Change)
8.2.3 Continuity.
8.2.3.1 Continuity of equipment grounding conductors and bonding jumpers shall be
ensured by effective connections.
8.2.3.2 Removing a device shall not interrupt the continuity of the equipment grounding
conductor or bonding jumper.
8.2.3.3 Bonding of equipment with bolts or other identified means shall be permitted if
paint and dirt are removed from the joint surfaces or the bonded members are
effectively penetrated.
8.2.3.4
Raceways, wireways, and cable trays shall not be used as equipment grounding or
bonding conductors.
8.2.3.5 Doors or Covers.
8.2.3.5.1
Where electrical devices are mounted on conductive doors or covers, an equipment
bonding jumper shall be installed.
8.2.3.5.2
Where required, an equipment bonding jumper shall connect the conductive door or
cover to the equipment enclosure or to an equipment grounding terminal within the
enclosure.
8.2.3.6
Portable, pendant, and resilient-mounted equipment shall be bonded by separate
conductors;. Where where multiconductor cable is used, the bonding conductor shall be
included as one conductor of the cable.
ORIGINAL: 8.2.4* Exclusion of Switching Devices.
The equipment grounding circuit shall not contain any switches or overcurrent protective
devices. Separable connections such as those provided in drawout equipment or
attachment plugs and mating connectors and receptacles shall provide for first-make,
Commented [BS2]: This section was broken out into subsections to conform with the MOS. See below for new structure. Page 56 of 114
last-break of the equipment grounding conductor. First-make, last-break shall not be
required where interlocked equipment, plugs, receptacles, and connectors preclude
energization without grounding continuity.
NEW: 8.2.4* Exclusion of Switching Devices.
8.2.4.1 The equipment grounding circuit shall not contain any switches or overcurrent
protective devices.
8.2.4.2 Separable connections such as those provided in drawout equipment or
attachment plugs and mating connectors and receptacles shall provide for first-make,
last-break of the equipment grounding conductor.
8.2.4.3 First-make, last-break shall not be required where interlocked equipment, plugs,
receptacles, and connectors preclude energization without grounding continuity.
8.2.5 Equipment Grounding Conductor Connecting Points.
8.2.5.1
All equipment grounding conductors shall be terminated in accordance with 13.1.1. The,
and the equipment grounding conductor connecting points shall have no other function.
8.2.5.2*
The equipment grounding conductor connecting points, other than the equipment
grounding terminal, shall be identified by the color GREEN, by the bicolor combination
of GREEN-AND-YELLOW, or by use of the symbol shown in Figure 8.2.1.3.4. Page 57 of 114
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First Revision No. 59-NFPA 79-2016 [ Section No. 9.1.1.4 ]
9.1.1.4
The source of supply for all control circuits shall be taken from the load side of the supply disconnecting
means.
Exception: The power supply circuit to memory elements and their support logic requiring power at all
times to maintain the storage of information control circuits meeting the requirements of excepted
circuits in 5.3.5.1(4) shall be permitted to be taken from the line side of the supply disconnecting means
or other power source.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 18:37:11 EST 2016
Committee Statement
Committee
Statement:
The revised text identifies the circuits as excepted circuits and refers users to the appropriate
sections for devices. Individual terms identified in the public input to be added would be covered in
5.3.5.1(4) as items that are required to be energized for satisfactory operation.
Response
Message:
Public Input No. 175-NFPA 79-2016 [Section No. 9.1.1.4]
Page 58 of 114
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First Revision No. 47-NFPA 79-2016 [ New Section after 9.2.5.3.2 ]
9.2.5.4 Stop by De-Energization.
Except for cycle stop commands (stop by energization), stop functions shall be initiated by
de-energization, not energization of a device or as a command to a programmable logic controller
(PLC).
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 11:05:56 EST 2016
Committee Statement
Committee
Statement:
The requirement for de-energization to cause a "stop" to occur was lost over the past editions. An
Exception was added that would be for the "Cycle Stop" or "Top Stop" command to cease
automatic process operation without de-energization.
Original language was rewritten for clarity based on editorial comments.
Response
Message:
Public Input No. 170-NFPA 79-2016 [New Section after 9.2.5.3.2]
Page 59 of 114
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First Revision No. 48-NFPA 79-2016 [ Section No. 10.1.6.2 ]
10.1.6.2 Arrangement of Operator Interface Devices.
All start pushbuttons shall be mounted above or to the left of their associated stop pushbuttons.
Exception No. 1: Start This requirement shall not apply to start pushbuttons in series, such as operating
pushbuttons on punch presses.
Exception No. 2: Wobble-stick or rod-operated emergency stop pushbuttons mounted in the bottom of
pendant stations This requirement shall not apply to emergency stop devices .
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 11:28:18 EST 2016
Committee Statement
Committee
Statement:
Emergency stop devices are uniquely identifiable and have location and mounting requirements
already given in 10.7. As emergency stop devices can be associated with more than one start
button, the requirement to locate the start buttons relative to an emergency stop device is
confusing.
Response
Message:
Public Input No. 102-NFPA 79-2016 [Section No. 10.1.6.2]
Page 60 of 114
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First Revision No. 32-NFPA 79-2016 [ Section No. 11.2.1.1 ]
11.2.1.1
All items of control equipment shall be placed and oriented so that they can be identified without moving
them or the wiring. Where practicable, with items that require checking or adjustment for correct operation
or that are liable to need replacement, those actions shall be possible without dismantling other
equipment or parts of the machine (except opening doors or removing covers). Terminals not associated
with control equipment shall also conform to these requirements.
11.2.1.1.1
Where practicable, with items that require checking or adjustment for correct operation or that are liable to
need replacement, those actions shall be possible without dismantling other equipment or parts of the
machine (except opening doors or removing covers).
11.2.1.1.2
Terminals not associated with control equipment shall also conform to these requirements.
11.2.1.1.3
The requirements in 11.2.1.1 , 11.2.1.1.1 , and 11.2.1.1.2 shall not apply to modules or
subassemblies that are disposable, permanently sealed, or unable to be opened.
Supplemental Information
File Name
Description
79-FR-32_11.2.1.1_editorial_revisions.docx
For committee use
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 16:59:57 EST 2016
Committee Statement
Committee
Statement:
An exception has been added to parts of the machine that cannot be serviced. Broke out
paragraph with several requirements into subsections for usability and clarity based on editorial
comments
Response
Message:
Public Input No. 86-NFPA 79-2015 [Section No. 11.2.1.1]
Page 61 of 114
4/22/2016 1:28 PM
ORIGINAL: 11.2.1.1
All items of control equipment shall be placed and oriented so that they can be identified without
moving them or the wiring. Where practicable, with items that require checking or adjustment
for correct operation or that are liable to need replacement, those actions shall be possible
without dismantling other equipment or parts of the machine (except opening doors or removing
covers). Terminals not associated with control equipment shall also conform to these
requirements.
Commented [BS1]: This section was broken into subsections to conform with the MOS and the Exception was changed to a subsection. See below for new structure. Exception: These requirements shall not apply to modules or subassemblies which are
disposable, permanently sealed, and cannot be opened.
NEW: 11.2.1.1
All items of control equipment shall be placed and oriented so that they can be identified without moving
them or the wiring. Where practicable, with items that require checking or adjustment for correct operation
or that are liable to need replacement, those actions shall be possible without dismantling other
equipment or parts of the machine (except opening doors or removing covers). Terminals not associated
with control equipment shall also conform to these requirements.
11.2.1.1.1
Where practicable, with items that require checking or adjustment for correct operation or that are liable to
need replacement, those actions shall be possible without dismantling other equipment or parts of the
machine (except opening doors or removing covers).
11.2.1.1.2
Terminals not associated with control equipment shall also conform to these requirements.
11.2.1.1.3
The requirements in 11.2.1.1, 11.2.1.1.1, and 11.2.1.1.2 shall not apply to modules or subassemblies that
are disposable, permanently sealed, or unable to be opened.
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First Revision No. 33-NFPA 79-2016 [ New Section after 11.2.1.9 ]
11.2.1.10
Busbars shall be securely fastened in place and the minimum spacing between uninsulated parts of
busbars, busbar terminals, and other bare metal parts shall not be less than specified in Table
430.97(D) of NFPA 70 .
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 17:06:38 EST 2016
Committee Statement
Committee
Statement:
Table 430.97(D) of NFPA 70 provides specific requirements for busbar spacings. These
separation or clearance requirements can also be found in Section 409.106 and in UL 508A.
Providing this new language into NFPA 79 aids in pointing the user to these requirements.
Response
Message:
Public Input No. 183-NFPA 79-2016 [New Section after 11.2.1.9]
Page 63 of 114
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First Revision No. 34-NFPA 79-2016 [ Section No. 11.2.2.1 ]
11.2.2.1
Machine compartments containing control equipment shall be completely isolated from coolant and oil
reservoirs. The compartment shall be readily accessible and completely enclosed. The compartment shall
not be considered enclosed where it is open to the floor, to the foundation upon which the machine rests,
or to other compartments of the machine that are not clean and dry.
11.2.2.1.1
Compartments containing equipment required to be readily accessible, such as branch circuit
overcurrent devices, shall be readily accessible and completely enclosed.
11.2.2.1.2
The compartment shall not be considered enclosed where it is open to the floor, to the foundation upon
which the machine rests, or to other compartments of the machine that are not clean and dry.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 17:41:56 EST 2016
Committee Statement
Committee
Statement:
Machine cabinets and compartments do not always need to be located where they are within easy
reach of the floor or a platform. It can be desirable to locate some components that do not need
frequent access, maintenance or servicing at higher locations. Not all equipment needs to be readily
accessible from the floor. This can also help provide better access and workspace to the industrial
machine and other equipment that does need more frequent access.
Response
Message:
Public Input No. 129-NFPA 79-2016 [Section No. 11.2.2.1]
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First Revision No. 35-NFPA 79-2016 [ Section No. 11.4.8 ]
11.4.8
A print pocket sized to accommodate physical electrical diagrams or software media shall be attached to
the inside or outside of the door of the control enclosure or compartment. When this is not practicable, it
shall be permissible to place a pocket suitable for the environment outside the door of the control
enclosure or compartment in a well-identified location. Single-door and multi-door enclosures shall have
at least one print pocket.
11.4.8.1
When this is not practicable, it shall be permissible to place a pocket suitable for the environment outside
the door of the control enclosure or compartment in a well-identified location.
11.4.8.2
Single-door and multi-door enclosures shall have at least one print pocket.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 17:47:39 EST 2016
Committee Statement
Committee
Statement:
This action takes into account the changing technology being used to provide documentation
of the provided machinery.
Broke out the single paragraph with several requirements into subsections for usability and
clarity.
Response
Message:
Public Input No. 114-NFPA 79-2016 [Section No. 11.4.8]
Page 65 of 114
4/22/2016 1:28 PM
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First Revision No. 49-NFPA 79-2016 [ Section No. 12.5.2 ]
12.5.2*
Conductors with higher insulation temperatures than specified for the termination(s) shall be permitted to
be used for ampacity adjustment, correction, or both, provided the final tabulated ampacity does not
exceed the lowest value of any termination.
Exception: Ampacities of 90°C (194°F) insulated conductors or other special purpose conductors with
higher temperature ratings can be determined in accordance with 310.15 of NFPA 70.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 11:36:10 EST 2016
Committee Statement
Committee Statement: The word tabulated is not the correct term and was removed.
Response Message:
Public Input No. 145-NFPA 79-2016 [Section No. 12.5.2]
Page 66 of 114
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First Revision No. 55-NFPA 79-2016 [ New Section after 12.5.4 ]
12.5.5
Conductors supplying a single motor or multiple motors shall be permitted to be sized based on 125
percent of the highest rated motor at demand factors based on the loading or application of the motors.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 16:03:25 EST 2016
Committee Statement
Committee
Statement:
Motors such as servo applications are frequently used at a small portion of their full load rating. If
many servo motors are on a machine without this provision the conductors used to supply those
motors are or would be sized many times larger than what they need to be.
Response
Message:
Public Input No. 126-NFPA 79-2016 [New Section after 12.5.4]
Page 67 of 114
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First Revision No. 56-NFPA 79-2016 [ Section No. 12.8.3 ]
12.8.3
Where ampacity derating adjustment is required for more than three current-carrying conductors, the
factor(s) shall be taken from Table 12.5.6(b).
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 16:06:04 EST 2016
Committee Statement
Committee
Statement:
The term adjustment is the appropriate term to refer to a factor based on more than three
current carrying conductors.
Response
Message:
Public Input No. 146-NFPA 79-2016 [Section No. 12.8.3]
Page 68 of 114
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First Revision No. 36-NFPA 79-2016 [ New Section after 13.1.2.3 ]
13.1.2.4*
Cable assemblies with factory-applied connectors and their associated wiring devices shall be
permitted, and such connectors shall not be considered as splices or joints.
Supplemental Information
File Name
Description
FR-36_A.13.1.2.4.docx
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 18:08:34 EST 2016
Committee Statement
Committee
Statement:
Product standards and products are available for wiring system components suitable for industrial
machinery including cable assemblies and associated wiring devices such as tees, panel-mounted
fittings, field-wired fittings, and so forth. Annex material will be submitted.
The new annex note provides a reference to two standards that address the cable assemblies and
associated wiring devices that 13.1.2.4 describes.
Response
Message:
Public Input No. 172-NFPA 79-2016 [New Section after 13.1.2.3]
Public Input No. 174-NFPA 79-2016 [New Section after A.13.1.2.1]
Page 69 of 114
4/22/2016 1:28 PM
FR‐36, New annex material A.13.1.2.4
For example, see UL Subject 2237 and UL 2238.
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First Revision No. 37-NFPA 79-2016 [ Section No. 13.1.6.1 ]
13.1.6.1
Exposed cables installed along the structure of the equipment or system or in the chases of the machinery
shall be permitted. Exposed cables and shall be installed to closely follow the surface and structural
members of the machinery.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 18:15:35 EST 2016
Committee Statement
Committee
Statement:
This FR is correcting an error in the last edition of the standard by removing an asterisk and
adding it to 13.1.7.1.
Response
Message:
Public Input No. 165-NFPA 79-2016 [Section No. 13.1.7.1]
Public Input No. 159-NFPA 79-2016 [Section No. 13.1.6.1]
Public Input No. 166-NFPA 79-2016 [Section No. A.13.1.6.1]
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First Revision No. 39-NFPA 79-2016 [ Section No. 13.2.2.1 ]
13.2.2.1*
The color GREEN with or without one or more YELLOW stripes shall be used to identify the equipment
grounding conductor where insulated or covered. This color identification shall be strictly reserved for the
equipment grounding conductor. GREEN shall be the predominant color when used in combination with
one or more YELLOW stripes.
Exception No. 1: In multiconductor cable-connected assemblies where equipment grounding is not
required, the solid color GREEN shall be permitted for other than equipment grounding.
Exception No. 1: It shall be permitted to use conductors of other colors any color , provided the insulation
or cover is appropriately identified at all points of access.
Exception No. 2: For grounded control circuits, use of a GREEN insulated conductor with or without one
or more YELLOW stripes or a bare conductor from the transformer terminal to a grounding terminal on
the control panel shall be permitted.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 18:54:48 EST 2016
Committee Statement
Committee
Statement:
Exception No. 1 was removed and Exceptions No. 2 and 3 were renumbered. Green is generally
reserved for equipment grounding conductors and Exception No. 1 was too broad. The remaining
exception provides the necessary flexibility from the main requirement.
This ensures that the equipment grounding conductor if striped is predominantly green.
Response
Message:
Public Input No. 118-NFPA 79-2016 [Section No. 13.2.2.1]
Public Input No. 190-NFPA 79-2016 [Section No. 13.2.2.1]
Page 72 of 114
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First Revision No. 40-NFPA 79-2016 [ Section No. 13.3.1 ]
13.3.1*
Nonmetallic ducts wiring channels shall be permitted only when they are made with a flame-retardant
insulating material.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 19:38:08 EST 2016
Committee Statement
Committee
Statement:
Duct was replaced with wiring channels for correlation within the standard. It should not be used
to describe an electric product in NFPA 79. The term "wiring channel" is presently used in
11.2.1.5.4 and 12.5.5 and is a better term.
Response
Message:
Public Input No. 148-NFPA 79-2016 [Section No. 13.3.1]
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First Revision No. 41-NFPA 79-2016 [ Section No. 13.3.4 ]
13.3.4
Conductors inside enclosures shall be supported where necessary to keep them in place. Conductors ,
and those that do are not run in ducts wiring channels shall be supported.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 19:51:33 EST 2016
Committee Statement
Committee
Statement:
Duct was replaced in the standard with wiring channels for correlation. The term "wiring
channel" is presently used in 11.2.1.5.4 and 12.5.5 and is a better term.
Response
Message:
Public Input No. 149-NFPA 79-2016 [Section No. 13.3.4]
Page 74 of 114
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First Revision No. 42-NFPA 79-2016 [ Section No. 13.4.1 ]
13.4.1 General Requirements.
The means of introduction entry of cables, cords, or ducts wireways with their individual glands,
bushings, and so forth into an enclosure shall ensure that the degree of protection of the enclosure is not
reduced.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 19:54:30 EST 2016
Committee Statement
Committee
Statement:
The term "duct" has been replaced with wireways which is the applicable term outside of the
enclosure. "Cords" was added as an additional means of entry. "Introduction" was changed to
entry and "of the enclosure" was added for clarity.
Response
Message:
Public Input No. 150-NFPA 79-2016 [Section No. 13.4.1]
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First Revision No. 7-NFPA 79-2016 [ Section No. 13.5.5.1 ]
13.5.5.1
Liquidtight flexible nonmetallic conduit (LFNC) is a raceway of circular cross section of the following
types:
A smooth, seamless inner core and cover that is bonded together and has one or more
reinforcement layers between the core and cover, designated as Type LFNC–A
A smoother inner surface with integral reinforcement within the conduit wall, designated as Type
LFNC–B
A corrugated internal and external surface with or without integral reinforcement within the conduit
wall, designated as Type LFNC–C
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Mon Feb 29 19:00:31 EST 2016
Committee Statement
Committee
Statement:
This section is identical to the definition in Section 3.3.19.4, and is not a requirement and
does not belong in the body of the document.
Response
Message:
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First Revision No. 45-NFPA 79-2016 [ Section No. 13.5.6 ]
13.5.6 Wireways(Cable Trunking Systems) .
13.5.6.1
Wireways (cable trunking systems) external to enclosures shall be rigidly supported and clear of all
moving or contaminating portions of the machine.
13.5.6.2
Covers shall be shaped to overlap the sides; gaskets shall be permitted. Covers shall be attached to
wireways by hinges or chains and held closed by means of captive screws or other suitable fasteners. On
horizontal wireway, the cover shall not be on the bottom. Hinged covers shall be capable of opening at
least 90 degrees.
13.5.6.2.1
Covers shall be attached to wireways by hinges or chains and held closed by means of captive screws or
other suitable fasteners.
13.5.6.2.2
On horizontal wireways, the cover shall not be on the bottom.
13.5.6.2.3
Hinged covers shall be capable of opening at least 90 degrees.
13.5.6.3
Where the wireway is furnished in sections, the joints between sections shall fit tightly, but shall not be
required to be gasketed.
13.5.6.4
The only openings permitted shall be those required for wiring or for drainage.
13.5.6.5
Wireways shall not have opened but unused knockouts.
13.5.6.6
Metal thickness and construction of wireways shall comply with ANSI/ UL 870.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 20:18:31 EST 2016
Committee Statement
Committee
Statement:
"Cable trunking systems" is an IEC term and should have been deleted in the 2015 edition.
Wireways is the correct term for use in NFPA 79. "trunking systems" is further explained in
Annex J.
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Response
Message:
Public Input No. 147-NFPA 79-2016 [Section No. 13.5.6]
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First Revision No. 46-NFPA 79-2016 [ Section No. 15.1.1 ]
15.1.1 Receptacles for Accessory Equipment.
Where the machine or its associated equipment is provided with receptacle outlets to be used for
accessory equipment (e.g., handheld power tools, test equipment), the following conditions shall apply:
(1) Receptacles mounted external to externally or internally to the enclosure shall be ground-fault
circuit-interrupter (GFCI)–protected.
(2) Receptacles shall be supplied from a grounded 120-volt ac source.
(3) Receptacles shall be of the parallel blade grounding type, 125-volt, single-phase, 15- or 20-ampere
configuration and listed for the applied voltage.
(4) Receptacles with their associated attachment plugs (plug/sockets) shall be in accordance with
13.4.5.3 .
(5) The continuity of the equipment grounding circuit to the receptacle outlet shall be verified by
Section 18.2.
Exception: Verification is not required for PELV circuits in accordance with Section 18.2 .
(6) All ungrounded (unearthed) conductors connected to the receptacle outlet shall be protected against
overcurrent in accordance with the provisions of 7.2.5 , and these circuits shall not be connected to
other machine circuits.
(7) Where the power supply to the receptacle outlet is not disconnected by the supply disconnecting
device for the machine or section of the machine, the safety sign requirements of 5.3.5.4 shall apply.
(8) Receptacles shall be suitable for the environment. , Receptacles and those mounted external to the
enclosure and subject to dirt, dust, oil, or other contaminants shall be provided with a means to cover
the receptacle when the plug is removed.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 00:35:13 EST 2016
Committee Statement
Committee
Statement:
The revision will require ground fault circuit interrupter on internal receptacles and
increase safety.
Response Message:
Public Input No. 82-NFPA 79-2015 [Section No. 15.1.1]
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First Revision No. 58-NFPA 79-2016 [ Section No. 16.2.4 ]
16.2.4
A safety sign shall be provided adjacent to the disconnecting operating handle(s) where the disconnect(s)
that is interlocked with the enclosure door or cover does not de-energize all exposed live parts when the
disconnect(s) is in the open (off) position.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
[ Not Specified ]
Organization:
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 17:00:41 EST 2016
Committee Statement
Committee
Statement:
Stating the disconnect must be interlocked with the door limits the requirement to enclosures
utilizing doors. New technology equipment is utilizing removable covers (not hinged doors) so
clarifying this requirement includes both doors and covers improves the intended safety afforded by
this required interlocking.
Adding this text is in alignment with the actions taken on PI 188 for section 5.3.3.1(3) and
5.3.3.1(5).
Response
Message:
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First Revision No. 54-NFPA 79-2016 [ Section No. 17.2 ]
17.2 Information to Be Provided.
The following information shall be provided with the electrical equipment:
(1) Clear, comprehensive description of the equipment, the installation and mounting, and the
connection to the electrical supply(ies)
(2) Electrical supply circuit(s) requirements
(3) Overview (block) diagram(s) where appropriate
(4) Schematic diagram(s)
(5) Information (where appropriate) on the following:
(a) Programming
(b) Sequence of operation(s)
(c) Frequency of inspection
(d) Frequency and method of functional testing
(e) Adjustment, maintenance, and repair
(f)
Interconnection diagram
(g) Panel layouts
(h) Instruction and service manuals
(i)
Physical environment (e.g., lighting, vibration, noise levels, atmospheric contaminants)
(6) A description (including interconnection diagrams) of the safeguards, interacting functions, and
interlocking of guards with potentially hazardous motions
(7) A description of the safeguarding means and methods provided where the primary safeguards are
overridden (e.g., manual programming, program verification)
(8) Information for safety lockout procedure Means provided for the control of hazardous energies
(9) Explanation of unique terms
(10) Parts list and recommended spare parts list
(11) Maintenance instructions and adjustment procedures
(12) Reference information (where appropriate) on the following:
(a) Lubrication diagram
(b) Pneumatic diagram
(c) Hydraulic diagram
(d) Miscellaneous system diagrams (e.g., coolant, refrigerant)
Supplemental Information
File Name
Chapter_17_17.2_SL_MC_FR_54_PI_85.docx
Description
The attachment is to fix the tripped up text. The only Change
was in item 8. For staff use.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
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[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 14:41:15 EST 2016
Committee Statement
Committee
Statement:
Parenthesis 8 has been revised to provide clarity as the term "control of hazardous energies"
better reflects the information necessary to accomplish this requirement.
Response
Message:
Public Input No. 85-NFPA 79-2015 [Section No. 17.2]
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Section PI PAGE DISPOSITION 17.2 85 131 Create a First Revision based on PI 85 ‐ Passes Text 17.2 Information to Be Provided. The following information shall be provided with the electrical equipment: (1) Clear, comprehensive description of the equipment, installation and mounting, and the connection to the electrical supply(ies) (2) Electrical supply circuit(s) requirements (3) Overview (block) diagram(s) where appropriate (4) Schematic diagram(s) (5) Information (where appropriate) on the following: (a) Programming (b) Sequence of operation(s) (c) Frequency of inspection (d) Frequency and method of functional testing (e) Adjustment, maintenance, and repair (f) Interconnection diagram (g) Panel layouts (h) Instruction and service manuals (i) Physical environment (e.g., lighting, vibration, noise levels, atmospheric contaminants) (6) A description (including interconnection diagrams) of the safeguards, interacting functions, and interlocking of guards with potentially hazardous motions (7) A description of the safeguarding means and methods provided where the primary safeguards are overridden (e.g., manual programming, program verification) (8) Means provided for the control of hazardous energies. (9) Explanation of unique terms Page 83 of 114
(10) Parts list and recommended spare parts list (11) Maintenance instructions and adjustment procedures (12) Reference information (where appropriate) on the following: (a) Lubrication diagram (b) Pneumatic diagram (c) Hydraulic diagram (d) Miscellaneous system diagrams (e.g., coolant, refrigerant) Statement The control of hazardous energies better reflects the information necessary to accomplish this requirement. Page 84 of 114
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First Revision No. 43-NFPA 79-2016 [ Section No. B.1 ]
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B.1
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It is recommended that the information in Figure B.1 be provided by the intended user of the equipment. It
facilitates an agreement between the user and supplier on basic conditions and additional user
requirements to ensure proper design, application, and utilization of the electrical equipment of the
machine (see Section 4.1).
Figure B.1 Inquiry Form for the Electrical Equipment of Machines.
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Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 20:08:27 EST 2016
Committee Statement
Committee
Statement:
Replace the term "DUCT" with "wireways" in item 25 to be consistent within the standard. The
term "duct" has been replaced with wireways which is the applicable term outside of the
enclosure.
Response
Message:
Public Input No. 151-NFPA 79-2016 [Section No. B.1]
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First Revision No. 44-NFPA 79-2016 [ Section No. D.1 ]
Global FR-16
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D.1
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Figure D.1(a) through Figure D.1(q) are not intended to be (design) guidelines. They are included only to
illustrate documentation methods.
Figure D.1(a) Cover Sheet and Sheet Index.
Figure D.1(b) System Layout and Installation Diagram.
Figure D.1(c) Block (System) Diagram.
Figure D.1(d) Interconnection Diagram.
Figure D.1(e) Elementary Schematic.
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Figure D.1(f) PLC Input Diagram.
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Figure D.1(g) PLC Output Diagram.
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Figure D.1(h) Sample Enclosure Layout — Interior.
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Figure D.1(i) Sample Enclosure Layout — Exterior.
Figure D.1(j) Sequence of Operations — Graphical.
Figure D.1(k) Sequence of Operations — Descriptive Graphical.
Figure D.1(l) Sample Servo Diagram.
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Figure D.1(m) Sample PLC Network — Station Layout.
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Figure D.1(n) Sample Operator Station.
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Figure D.1(o) Sample Parts List.
Figure D.1(p) ISO (A2) Drawing Standard Framework.
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Figure D.1(q) Selections from ANSI Y32.2/IEEE 315/315A Symbol Table.
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Wed Mar 02 20:13:12 EST 2016
Committee Statement
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Committee
Statement:
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Replace the term "wire DUCT" with "wiring channel" in all locations in FIGURE D.1(h) to be
consistent within the standard.
Response
Message:
Public Input No. 152-NFPA 79-2016 [Section No. D.1]
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First Revision No. 67-NFPA 79-2016 [ Section No. F.5.4 ]
F.5.4
Electrical enclosures that carry only an IP-rating have not been designed to the additional NEMA 250
type–rating requirements. Therefore, a type-rating cannot be assigned to an enclosure that has only been
IP-rated because of the exclusion of the additional requirements of the type-rating system. Enclosure
types are shown in Table F.5.4 .
Table F.5.4 Enclosure Selection
For Outdoor Use
Provides a Degree of Protection Against the Following
Environmental Conditions
Enclosure-Type Number
3 3R 3S 3X 3RX 3SX 4 4X
6
6P
Incidental contact with the enclosed equipment
X X
X
X
X
X
X X
X
X
Rain, snow, and sleet
X X
X
X
X
X
X X
X
X
Sleet*
— —
X —
—
X
— — — —
Windblown dust
X —
X
X
—
X
X X
X
X
Hosedown
— — — —
—
—
X X
X
X
Corrosive agents
— — — X
X
X
— X
—
X
Temporary submersion
— — — —
—
— — —
X
X
Prolonged submersion
— — — —
—
— — — —
X
For Indoor Use
Provides a Degree of Protection Against the Following
Environmental Conditions
Enclosure-Type Number
1 2
4 4X
5
6
6P 12 12K 13
Incidental contact with the enclosed equipment
X X
X
X
X
X
X X
X
X
Falling dirt
X X
X
X
X
X
X X
X
X
Falling liquids and light splashing
— X
X
X
X
X
X X
X
X
Circulating dust, lint, fibers, and flyings
— —
X
X
—
X
X X
X
X
Settling airborne dust, lint, fibers, and flyings
— —
X
X
X
X
X X
X
X
Hosedown and splashing water
— —
X
X
—
X
X — — —
Oil and coolant seepage
— — — —
—
— — X
X
X
Oil or coolant spraying and splashing
— — — —
—
— — — —
X
Corrosive agents
— — — X
—
—
X — — —
Temporary submersion
— — — —
—
X
X — — —
Prolonged submersion
— — — —
—
—
X — — —
*Mechanism shall be operable when ice covered.
Informational Note No. 1: The term raintight is typically used in conjunction with Enclosure Types 3, 3S,
3SX, 3X, 4, 4X, 6, and 6P. The term rainproof is typically used in conjunction with Enclosure Types 3R,
and 3RX. The term watertight is typically used in conjunction with Enclosure Types 4, 4X, 6, 6P. The term
driptight is typically used in conjunction with Enclosure Types 2, 5, 12, 12K, and 13. The term dusttight is
typically used in conjunction with Enclosure Types 3, 3S, 3SX, 3X, 5, 12, 12K, and 13.
Informational Note No. 2: Ingress protection (IP) ratings may be found in IEC 60529, Degrees of
Protection Provided by Enclosures . IP ratings are not a substitute for Enclosure Type ratings. [ 70: Table
110.28]
Submitter Information Verification
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Submitter Full Name: Mark Cloutier
Organization:
National Fire Protection Assoc
Street Address:
City:
State:
Zip:
Submittal Date:
Tue Mar 29 08:51:28 EDT 2016
Committee Statement
Committee
Statement:
Since the table in F.4 is exactly taken from Table 110.28 (enclosure selection) of NFPA 70 and
extract tag was added in accordance with the manual of style.
Response
Message:
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First Revision No. 61-NFPA 79-2016 [ New Section after J.3 ]
J.4 Terms and Definitions Used in CEMA 110.
Control Architecture, Centralized. A control logic architecture in which all logic solving, sensory input
collection, and actuator control is executed by a single controller and control panel. An example would
be a PLC control cabinet that contains a processor to solve logic, input modules for all sensor signals,
and output modules for all actuator control signals. The input and output signals would be wired from the
field device to the PLC control cabinet.
Control Architecture, Distributed. A control logic architecture in which all logic, sensory input, and
actuator control is solved, collected, and executed by more than one controller. An example would be
microcontrollers located on every conveyor motor that contain a processor to solve logic, input modules
for all sensors signals, and output modules for all actuator control signals. The input and output signals
would be wired from the field device to the microcontroller. Each microcontroller would solve logic and
command actuators that are specific to the function of the conveyor. The coordination of all the motors
(macro-commands) would be completed with intra-microcontroller communication and microcontroller
communication with the machine supervisor control system.
Device Wiring Architecture, Discrete. A power and control distribution system architecture in which
all sensor and actuator signals are collected and delivered by directly wiring to/from the device and the
controller. An example would be a binary sensor signal that would use one wire to communicate an “on”
or “off” state based on the absence or presence of voltage with respect to a voltage reference that is
common to the sensor and controller.
Device Wiring Architecture, Distributed. A power and control distribution system architecture in
which all sensor and actuator signals are collected and delivered by network interface modules, which
then interpret the sensor signals and convert them into a message to be transmitted to the controller
over a communication network. The complementary PLC sends a message to the actuator network
interface, which converts the message to an output command for the actuator. An example would be a
sensor wire connected to a remote input module. The remote input module and controller would be
connected to an Ethernet network and would exchange data at a rate sufficient to properly control the
machine.
Power Distribution Architecture, Dedicated. A power and control distribution system architecture in
which each nominal voltage supply is distributed using a dedicated path and in which no overlap of
function or supply function is allowed. An example would be a 480 V ac supply to motors carried on
wires or busbars, a supply to 24 V dc devices carried on wires or busbars, and communication networks
carried on dedicated cables.
Power Distribution Architecture, Multifunction. A system architecture in which voltage supplies
share common pathways and overlap in function for power and communication distribution. Examples
would include power over Ethernet (dc supply carried on ethernet cable) or Ethernet over power
(Ethernet communications carried on high power conductors).
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 19:19:04 EST 2016
Committee Statement
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Subtitles were capitalized for consistency. By adding a section with terms and definitions from
CEMA 110, users from this industry will have harmonization.
Independent of the CEMA harmonization, by adding a definition of the proposed, a reference for
documentation clarification will be established. This will lead to future improvement and technology
in documentation that is not possible without establishing a standard definition.
Response
Message:
Public Input No. 87-NFPA 79-2015 [New Section after J.1]
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First Revision No. 62-NFPA 79-2016 [ Section No. J.3 ]
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J.3 Terms and Definitions Relating to Protective and Functional Bonding Used in IEC 60204-1, 6th
Edition Relating to Protective and Functional Bonding Extracted from the Draft of the 2nd CD for the 6th
Edition .
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Cable Trunking System. A system of enclosures comprised consisting of a base and a removable cover
intended for the complete surrounding of insulated conductors, cables, and cords.
Discussion. Cable trunking is commonly used within enclosures to support and contain conductors.
Duct. An enclosed channel designed expressly for holding and protecting electrical conductors, cables,
and busbars.
Equipotential Bonding. Provision of electric connections between conductive parts, intended to achieve
equipotentiality.
[IEV IEC 195-1-10]
Discussion. Connecting conductive parts together minimizes voltage differences but by itself does not
provide an effective fault current path.
Exposed Conductive Part. Conductive part of electrical equipment, which can be touched and which is
not live under normal operating conditions, but which can become live under fault conditions.
[IEV IEC 826-12-10, modified]
Discussion. Often linked with “structural parts"; electrical parts that are not normally live generally do need
to be bonded to the protective bonding circuit.
Extraneous Conductive Part. Conductive part not forming part of the electrical installation and liable to
introduce a potential, generally the earth potential.
[IEV IEC 826-12-11, modified]
NOTE: Examples of extraneous conductive parts can include ladders, handrails, pipes, machine parts,
etc., that appear with this definition.
Discussion. Generally, the machine is considered an extraneous conductive part.
Fault Protection. Protection against electric shock under single-fault conditions.
[IEV IEC 195-06-02]
Discussion. Overcurrent protective devices and double insulation are types of fault protection.
Functional Bonding. Equipotential bonding necessary for proper functioning of electrical equipment.
Discussion. PLCs and drives generally do not need special bonding, and there are only a few devices that
need separate “functional” bonding, such as some scales.
Live Part. Conductor or conductive part intended to be energized in normal use, including a neutral
conductor, but, by convention, not a PEN conductor.
Discussion. PLCs and drives generally do not need special bonding, and there are only a few devices
that need separate “functional” bonding, such as some scales.
NOTE: This term does not necessarily imply a risk of electric shock.
Neutral Conductor N. Conductor electrically connected to the neutral point of a system and capable of
contributing to the distribution of electrical energy.
[IEV IEC 195-02-06, modified]
Plug/Socket Combination. Component and a suitable mating component, appropriate to terminate
conductors, intended for connection or disconnection of two or more conductors.
NOTE: Examples of plug/socket combinations include:
– connectors which fulfill the requirements of IEC 61984
– a plug-and-socket-outlet, a cable coupler, or an appliance coupler in accordance with IEC 60309-1
– a plug-and-socket; outlet in accordance with IEC 60884-1 or an appliance coupler in accordance with
IEC 608320-1
Protective Bonding. Equipotential bonding for protection against electric shock.
NOTE: Measures for protection against electric shock can also reduce the risk of burns or fire.
Discussion. The network of protective conductors, along with the necessary bonding jumpers, provide the
protective bonding, including the connection to the “main earthing terminal PE."
Protective Bonding Circuit. Protective conductors and conductive parts connected together to provide
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protection against electric shock in the event of an insulation failure.
Protective Conductor. Conductor required for protective bonding by some measures for protection
against electric shock for electrically connecting any of the following parts:
– exposed conductive parts;
– extraneous conductive parts;
– main earthing terminal (PE)
[IEV IEC 826-13-22, modified]
Submitter Information Verification
Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 19:26:16 EST 2016
Committee Statement
Committee
Statement:
Annex J was revised to reflect the latest edition of IEC 60204-1 and make editorial
corrections.
Response Message:
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First Revision No. 64-NFPA 79-2016 [ Chapter K ]
Annex K Informational References
K.1 Referenced Publications.
The documents or portions thereof listed in this annex are referenced within the informational sections of
this standard and are not part of the requirements of this document unless also listed in Chapter 2 for
other reasons.
K.1.1 NFPA Publications.
National Fire Protection Association, 1 Batterymarch Park, Quincy, MA 02169-7471.
NFPA 70®, National Electrical Code®, 2014 2017 edition.
NFPA 70E®, Standard for Electrical Safety in the Workplace®, 2015 edition.
NFPA 77, Recommended Practice on Static Electricity, 2014 edition.
K.1.2 Other Publications.
K.1.2.1 ANSI Publications.
American National Standards Institute, Inc., 25 West 43rd Street, 4th Floor, New York, NY 10036.
ANSI B11.0, Safety of Machinery — General Requirements and Risk Assessment, 2010.
ANSI B11-TR4, Selection of Programmable Electronic Systems (PES/PLC) for Machine Tools, 2004.
ANSI B11-TR6, Safety Control Systems for Machine Tools, 2010.
ANSI Z535.4, Product Safety Signs and Labels, 2007 2011 .
K.1.2.2 EN CENELEC Publications.
CENELEC, European Committee for Electrotechnical Standardization (CENELEC), 35, Rue de
Stassartstraat, B-1050 , CENELEC Management Centre, Avenue Marnix 17, 4th floor, B - 1000 Brussels,
Belgium . CENELEC Online Info Service: Info@cenelec.org
BS EN 60204-1, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements, 2006 + A1 2009 corrigendum, 2010 .
BS EN 61010-1, Safety requirements for electrical equipment for measurement, control, and laboratory
use — Part 1: General requirements, 2010, corrigendum, 2011 .
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K.1.2.3 IEC Publications.
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International Electrotechnical Commission, 3, rue de Varembé, P.O. Box 131, CH-1211 Geneva 20,
Switzerland.
IEC 60034-1 Ed. 12.0, Rotating electrical machines — Part 1: Rating and performance, 2010.
IEC 60072-1 Ed. 6.0, Dimensions and output series for rotating electrical machines — Part 1: Frame
numbers 56 to 400 and flange numbers 55 to 1080, 1991.
IEC 60204-1 Ed. 5.1, Safety of machinery — Electrical equipment of machines — Part 1: General
requirements, 2009.
IEC 60332-1-1 Ed. 1.0 [Series] 1 , Tests on electric and optical fibre cables under fire conditions —
Part 1-1 : Test on for vertical flame propagation for a single vertical insulated wire or cable apparatus ,
2004 2015 .
IEC 60364-4-41 Ed. 5.0, Electrical installations of buildings — Part 4-41: Protection for safety —
Protection against electric shock, 2005.
IEC 60364-5-53 Ed. 3.1 2 , Electrical Installations of Buildings buildings — Part 5-53: Selection and
Erection erection of Electrical electrical Equipment equipment — Isolation, Switching switching and
Control control , 2006 2015 .
IEC 60417 DB [Database], Graphical symbols for use on equipment — Part 1: Overview and application,
2002.
IEC 60529 Ed. 2.1 2 , Degrees of protection provided by enclosures (IP Code), 2001 2013, corrigendum
2, 2015 .
IEC 60621-3 Ed. 1.0, Electrical installations for outdoor sites under heavy conditions (including open-cast
mines and quarries). — Part 3: General requirements for equipment and ancillaries, 1979. (withdrawn).
IEC 60742 Ed. 1.0, Isolating transformers and safety isolating transformers, 1983. (superseded by IEC
61558-1).
IEC 60870-5-1 Ed. 1.0, Telecontrol equipment and systems. — Part 5: Transmission protocols —
Section One: Transmission frame formats, 1990.
IEC 60947-4-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 4-1: Contactors and motorstarters— Electromechanical contactors and motor-starters, 2012.
IEC 60947-5-1 Ed. 3.1, Low-voltage switchgear and controlgear — Part 5-1: Control circuit devices and
switching elements — Electromechanical control circuit devices, 2009.
IEC 60947-7-1 Ed. 3.0, Low-voltage switchgear and controlgear — Part 7-1 : Ancillary equipment —
Section 1: Terminal blocks for copper conductors, 2009.
IEC 61010-1 Ed. 3.0, Safety requirements for electrical equipment for measurement, control, and
laboratory use — Part 1: General requirements, 2010.
IEC 61310-1 Ed. 2.0, Safety of machinery — indication Indication , marking and actuation — Part 1:
Requirements for visual, auditory and tactile signals, 2007.
IEC 61310-3 Ed. 2.0, Safety of machinery — indication Indication , marking and actuation — Part 3:
Requirements for the location and operation of actuators, 2007.
IEC 61508 Ed. 2.0, [Series] Functional safety of electrical/electronic/programmable electronic safetyrelated systems, 2010.
IEC 61558-1 Ed. 2.1, Safety of power transformers, power supply units and similar — Part 1: General
requirements and tests, 2009 2011 .
IEC 61800-5-2 Ed. 1.0, Adjustable speed electrical power drive systems — Part 5-2: Safety requirements
— Functional, 2007.
IEC 62061 Ed. 1.1 2 , Safety of machinery — Functional safety of electrical, electronic and programmable
control systems, 2012 2015, corrigendum 1, 2015 .
NOTE: The IEC publishes consolidated editions of its publications with all the amendments and
corrigenda included with the base document. For example:
Edition 1.0 is a base document without any amendments.
Edition 1.1 is the base 1.0 edition consolidated with one amendment.
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Edition 1.2 is the base 1.0 edition consolidated with two amendments.
Edition 2.0 is the second edition of a base document. This may include new information combined as well
as amendments from edition 1.x.
Edition 2.1 is the second edition of a document consolidated with amendment 1 to that edition.
Global FR-16
K.1.2.4 IEEE Publications.
Institute of Electrical and Electronics Engineers, Three IEEE, 3 Park Avenue, 17th Floor, New York, NY
10016-5997.
IEEE 100 CD , The Authoritative Dictionary of IEEE Standard Terms , 7th edition, 2000 2013 .
ANSI Y32.2/IEEE 315 /315A , IEEE Graphic Symbols for Electrical and Electronics Diagrams (Including
Reference Designation Letters) , 1993.
IEEE 841, Standard for Petroleum and Chemical Industry — Premium-Efficiency, Severe-Duty, Totally
Enclosed Fan-Cooled (TEFC) Squirrel Squirrel Cage Induction Motors — up to and Up to and Including
370 kW ( 500 hp ) , 1994 2009 .
K.1.2.5 ISO Publications.
International Organization for Standardization, 1, ch. de la Voie-Creuse, Case postale 56, CH-1211
Geneva 20, ISO Central Secretariat, BIBC II, 8, Chemin de Blandonnet, CP 401, 1214 Vernier, Geneva,
Switzerland.
ISO 7000, Graphical symbols for use on equipment — Index and synopsis , 2012 Registered symbols ,
2014 .
ISO 12100, Safety of machinery — Basic concepts, general General principles for design — Part 1: Basic
terminology, methodology Risk assessment and risk reduction , 2010.
ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General principles
for design, 2006, corrigendum 1, 2009 .
ISO 13849-2, Safety of machinery — Safety-related parts of control systems — Part 2: Validation, 2012.
ISO 13850, Safety of machinery — Emergency stop function — Principles for design, 2006 2015 .
K.1.2.6 NEMA Publications.
National Electrical Manufacturers Association, 1300 North 17th Street, Suite 1847 900 , Rosslyn Arlington ,
VA 22209.
NEMA MG-1, Motors and Generators, 2003 2014 .
NEMA 250, Enclosures for Electrical Equipment (1000 Volts Maximum), 2003 2014 .
K.1.2.7 SEMI Publications.
Semiconductor Equipment and Materials International, 3081 Zanker Road, San Jose, CA 95134.
SEMI S2, Environmental, Health, and Safety Guideline for Semiconductor Manufacturing Equipment,
2003 2010 .
SEMI S9, Safety Guideline for Electrical Design Verification Tests for Semiconductor Manufacturing
Equipment, 2001. (withdrawn 2007).
SEMI S22, Safety Guideline for the Electrical Design of Semiconductor Manufacturing Equipment,
2006 2010 .
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K.1.2.8 UL Publications.
Underwriters Laboratories Inc., 333 Pfingsten Road, Northbrook, IL 60062-2096.
ANSI/ UL 50, Standard for Enclosures for Electrical Equipment, 2007, revised 2015 .
ANSI/ UL 62, Standard for Flexible Cord and Fixture Wire, 2010, revised 2014 .
ANSI/ UL 248-14, Standard for Low-Voltage Fuses — Part 14: Supplemental Fuses, 2000,
Revised revised 2010 2015 .
ANSI/ UL 489, Standard for Molded-Case Circuit Breakers, Molded-Case Switches, and Circuit-Breaker
Enclosures, 2009, revised 2014 .
ANSI/ UL 498, Standard for Attachment Plugs and Receptacles, 2001 2012 , Revised revised 2009 2014 .
ANSI/ UL 508, Standard for Industrial Control Equipment, 1999, Revised revised 2010 2013 .
UL 508A, Standard for Industrial Control Panels, 2001, Revised revised 2010 2014 .
ANSI/ UL 651, Standard for Schedule 40 and 80 Rigid , EB and A Rigid PVC Conduit and Fittings ,
2005 2011 , Revised revised 2008 2014 .
ANSI/ UL 758, Appliance Wiring Material, 2006 2014 , Revised revised 2009 2014 .
ANSI/ UL 1004-1, Standard for Rotating Electrical Machines, 2008 2012 , Revised revised 2011 2015 .
ANSI/ UL 1077, Standard for Supplementary Protectors for Use in Electrical Equipment, 2005,
Revised revised 2010 2015 .
ANSI/ UL 1682, Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type,2007 2013,
revised 2013 .
ANSI/ UL 60950-1, Information Technology Equipment — Part I: General Requirements, 2007,
Revised revised 2011 2014 .
UL Subject 2237 Outline , Outline of Investigation for Multi-Point Interconnection Power Cable Assemblies
for Industrial Machinery, 2011 2015 .
IEC/UL 61010A-1 UL 61010 , Electrical Equipment for Measurement, Control and Laboratory Use —
Part 1: General Requirements, 2002 2014 .
UL 61010-1, UL Standard for Safety Electrical Equipment For Measurement, Control, and Laboratory
Use — Part 1: General Requirements , 2004, revised 2015.
K.2 Informational References.
The following documents or portions thereof are listed here as informational resources only. They are not
a part of the recommendations requirements of this document.
DOE-HDBK-1003-96, Guide to Good Practices for Training and Qualification of Maintenance Personnel ,
1996.
IEC 61346-2 81346-2 , Industrial systems, installations and equipment and industrial products —
Structuring principles and reference designations — Part 2: Classification of objects and codes for
classes2000-04 2009 (supersedes IEC 61346-2) .
IEC 61558-2-6, Safety of power transformers, power supply units and similar — Part 2: Particular
requirements for isolating transformers for general use of transformers, reactors, power supply units and
similar products for supply voltages up to 1100 V — Part 2-6: Particular requirements and tests for safety
isolating transformers and power supply units incorporating safety isolating transformers , 1997-03 2009 .
ISO 5457, Technical product documentation — Sizes and layout of drawing sheets, 1999, amendment 1,
2010 .
ISO 7200, Technical product documentation — Data fields in title blocks and document headers, 2004.
K.3 References for Extracts in Informational Sections.
NFPA 70®, National Electrical Code®, 2014 2017 edition.
Submitter Information Verification
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Submitter Full Name: Mark Cloutier
Organization:
[ Not Specified ]
Street Address:
City:
State:
Zip:
Submittal Date:
Thu Mar 03 19:33:26 EST 2016
Committee Statement
Committee
Statement:
The references have been updated to appropriate editions.
This DOE handbook gives guidance to industrial management when qualifying electrical
maintenance workers to germane job tasks. It is presently used as a guide to all DOE projects
and suggested by OSHA as a guide.
Response
Message:
Public Input No. 115-NFPA 79-2016 [Section No. K.1.2.8]
Public Input No. 2-NFPA 79-2015 [Chapter K]
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