Proposed Changes & Revisions to the 2017 National Electrical Code©

Proposed
Changes & Revisions
2017 National Electrical Code©
Sources:
http://iaeimagazine.org/magazine/2015/04/30/analysis-of-changes-2017-nec/
http://iaeimagazine.org/magazine/2015/09/04/analysis-of-changes-2017-nec-part-2/
With the 2017 release of the NEC coming soon, there are some
changes and revisions you will need to know.To prepare you for
the upcoming changes,TPC Training Systems introduces some of
the proposed and expected changes to come with this release.
National Electrical Code
2017 NEC
info@tpctraining.com

Proposed New Articles
2017 NEC
Source: http://iaeimagazine.org/magazine/2015/04/30/analysis-of-changes-2017-nec/
2017 NEC

2017 NEC
Article 425 - Fixed Resistance and
Electrode Industrial Process
Heating Equipment
Boilers
Electrode Boilers
Duct Heaters
Strip Heaters
Immersion Heaters
Process Air Heaters
Other Approved Fixed
Electrical Equipment
Heating & Room
Air-Conditioning for
Personnel Space
Does not apply to:

2017 NEC
Article 691 - Large-Scale Photovoltaic
(PV) Electric Supply Stations
1) elimination of AHJ professional risk when assessing
compliance of large-scale PV electric supply stations
2) enabling system engineers to use engineering best practices
in the design of large-scale PV electric supply stations.
According to the substantiation, the two main drivers for this
proposed new article are:

2017 NEC
Article 706 - Energy Storage Systems
The current state of energy storage technology,
which includes batteries, and the anticipated
evolution of energy storage, support the
need for a singular set of requirements
in the NEC covering such systems.

2017 NEC
Article 712 - Direct-Current Microgrids
The current state of energy storage technology,
which includes batteries, and the anticipated
evolution of energy storage, support the
need for a singular set of requirements
in the NEC covering such systems.

Chapter ONE - General
Requirements
2017 NEC
Changes to Chapter One:
General Requirements
2017 NEC

Requirements
2017 NEC
NEW: 110.14(D) - Electrical Equipment:
TighteningTorque
Findings of a field study presented in 2011, indicated that
installers incorrectly tighten electrical terminations at least
75% of the time when not using a torque wrench.
This proposed requirement would make it clear to installers
and inspectors that using torque tools is required when a
torque value is indicated on electrical equipment, such as a
banelboard lug.

Requirements
2017 NEC
NEW: 110.16(B) - Arc-Flash Hazard
Warning - Service Equipment
Requires additional information to be included in the arc-flash
hazard warning label specifically addressing service equipment.
And at least one of the following:
Available incident energy & corresponding working distance
Minimum Arc Rating of Clothing
Site-Specific Level of PPE
Nominal SystemVoltage Arc-Flash Boundaries
Requires Labels to Contain:

Requirements
2017 NEC
NEW: 110.21(A)(2) - Equipment
Marking - Reconditioned Equipment
Requires reconditioned equipment to be makred with the
name, trademwark, or other descriptive marking,
identifying the organization responsible for reconditioning
the electrical equipment. It also requires the date of the
reconditioning to be provided as well.

Requirements
2017 NEC
NEW: 110.26(A)(4) -Working Space
About Electrical Equipment -
Limited Access
Addresses equipment “located in a space with limited access,”
such as above a suspended ceiling or in a crawl space.
There are four restrictions:
Where equipment is located above a lay-in ceiling
Width of the limited access working space
Doors or hinged panels being capable of opening a minimum of 90°
Space in front of the enclosure

Requirements
2017 NEC
These working space signs would be required to meet the
requirements of 110.21(B) for field-applied hazard
markings and would need to read as follows:
NEW: 110.26(A)(4) -Working Space
About Electrical Equipment - Clear
Space Signs
“NOTICE - ELECTRICAL EQUIPMENT
WORKING SPACE AND EGRESS AREA - NO
OBSTRUCTION OR STORAGE ALLOWED.”

Chapter TWO - Wiring
and Protection
2017 NEC
Changes to Chapter Two:
Wiring and Protection
2017 NEC

and Protection
2017 NEC
REVISION: 210.8(A) - GFCI Protection:
Dwelling Units
All 250-volt, single-phase, 15-and 20-ampere receptables
installed in the locations specificed in 210.8(A), present a
shock hazard and should be included in the GFCI protection
in dwelling units.

and Protection
2017 NEC
NEW: 210.8(B)(2)(A) - SPGFCI
Protection
The requirements in this section have been expanded to
recognize the fact that shock hazards are not limited to
15- and 20-ampere, 125-volt circuits at nondwelling unit
locations.

and Protection
2017 NEC
NEW: 210.11(C)(4) - Dwelling Units -
Garage Branch Circuits
A new requirement has been proposed to require at least
one 20-ampere rated branch circuit to supply dwelling unit
garage 125-volt receptable outlet(s).
Many appliances and tools used in dwelling unit garages are
rated at 12-16-amperes or higher and demand at least a
20-ampere rated branch circuit.

and Protection
2017 NEC
REVISION: 210.12(A) - Whole-House
AFCI Protection
The proposed revision to 210.12(A) would require
arc-fault circuit-interrupter (AFCI) protection for all
120-volt, single-phase, 15- and 20-ampere branch circuits
supplying outlets or devices installed in dwelling units.

and Protection
2017 NEC
NEW: 210.71 - Meeting Room
Receptacles
New requirements for a minimum number of
nonlocking-type 125-volt, 15-and 20-ampere receptacles to
be installed in nondwelling unit meeting rooms have been
proposed.
This proposal addresses the inherent concerns relating to
inadequate access to electrial power in meeting rooms.

and Protection
2017 NEC
REVISION: 230.29 - Overhead Service
Conductors - Supports Over Buildings
Revisions to 230.29 will require metal support racks or
structures to be bonded by means of a bonding jumper
and listed connector to the grounded overhead service
conductor for grounded systems.
This proposed language will provide installers clear
bonding provisions and the AHJ a clear requirement for
enforcement.

and Protection
2017 NEC
NEW: 240.67 - Arc Energy Reduction
(Fuses)
The proposed requirements of 240.67 are based upon the
requirements in 240.87 for circuit breakers, but modified
to work with fusible switches.This arc energy reduction
requirement for fusible switches has a proposed future
effective date of January 1, 2020.

and Protection
2017 NEC
REVISION: 250.30(A)(4) - Grounding
Separately Derived AC Systems -
Grounding Electrode System
The new proposed text at 250.30(A)(4) will allow any of
the building or structure grounding electrodes described
at 250.52(A) to be used as the grounding electrode for the
separately derived system without an order of preference.

and Protection
2017 NEC
3.0m (10ft)
or more
REVISION: 250.52(A)(2) - Grounding
Electrodes - Metal In-Ground Support
Structure(s)
Currently, two conditions exist in the 2014 NEC in order
for a metal frame of a building or structure to qualify as a
grounding electrode.The proposed text for the 2017 NEC
leaves only one condition:
One or more metal in-ground support structure(s) in
direct contact with the earth vertically for 3.0m (10ft) or
more, with or without concrete encasement.

and Protection
2017 NEC
NEW: 250.52(B)(3) - Not Permitted
For Use As Grounding Electrodes
Decisive language was proposed that would prohibit the
structures and/or structural reinforcing steel of an
in-ground swimming pool described at 680.26(B)(1) and
(B)(2) from being used as a grounding electrode for a
building or structure.

Changes to Chapter Three:
Wiring Methods
2017 NEC
Chapter THREE -
Wiring Methods
2017 NEC

Chapter THREE -
Wiring Methods
2017 NEC
REVISION:Table 300.5 - Minimum
Cover Requirements
A new “General Note” to Table 300.5 has been
recommended to resolve a potential conflict between UL
1838 and Table 300.5. The proposed footnote would read:
“A lesser depth [other than specified by Table 300.5] shall be
permitted where specified in the installation instructrions of
a listed low-voltage lighting system.”

Chapter THREE -
Wiring Methods
2017 NEC
REVISION: 310.15(B)(7) - Sizing
Dwelling Unit Services and Feeders
For the 2017 NEC, a First Revision will allow the reduction in
size for dwelling unit service conductors and a feeder that
supplies the entire dwelling to also include systems of a
120/208-volt system to qualify as well.

Chapter THREE -
Wiring Methods
2017 NEC
NEW: 314.27(E) - Outlet Boxes -
Separable Attachment Fittings
Addresses new technology incorporating listed power
supply devices, and listed locking support, and mounting
receptacles and supporting means for luminaires and
ceiling-suspended paddle fans to be installed in or to boxes
designed for the purpose.

Chapter THREE -
Wiring Methods
2017 NEC
NEW: 320.6 - Listing Requirements -
Cable Wiring Methods
New provisions have been proposed to be added at .06 of
several of the cable-type wiring method articles that would
require the wiring method (cable) and associated fittings to
be listed and labeled.
This new listing requirement was proposed for:
320.6 Type AC cable
322.6 Type FC cable
324.6 Type FCC cable
328.6 Type MV cable
330.6 Type MC cable
332.6 Type MI cable
334.6 Type NM cable
336.6 Type TC cable
338.6 Type SE cable
340.6 Type UF cable.

Chapter THREE -
Wiring Methods
2017 NEC
REVISION: 338.10(B)(4) - Uses
Permitted -Type SE Cable
Provisions have been proposed to limit the restriction of
service-entrance (SE) cables ampacity ratings to the
60ºC(140ºF) conductor temperature rating.
This change will align smaller Type SE cables wi th Type NM
cables as related to heat dissipation when installed in
thermal insulation.

Chapter THREE -
Wiring Methods
2017 NEC
NEW: 366.20 - Auxiliary Gutters -
Conductors Connected in Parallel
Specific language requires parallel conductors to be
installed in groups consisting of not more than one
conductor per phase, neutral, or grounded conductor to
prevent current imbalance in the paralleled conductors due
to inductive reactance.
The same parallel provisions were also proposed for metal
wireways at 376.20 and for nonmetallic wireways at 378.20.

Changes to Chapter Four:
Equipment for General Use
2017 NEC
Source: http://iaeimagazine.org/magazine/2015/09/04/analysis-of-changes-2017-nec-part-2/
Chapter FOUR -
Equipment for
General Use
2017 NEC

Chapter FOUR -
Equipment for
General Use
2017 NEC
NEW: 404.22 - Electronic Lighting
Control Switches
This new provision prohibits electronic lighting control
switches from introducing current on the equipment
groundign conductor during normal operation.
This proposal would have a future effective date of January
1, 2020.

Chapter FOUR -
Equipment for
General Use
2017 NEC
NEW: 406.3(F) - Receptacle With USB
Charger
New provisions would require 125-volt 15- or 20-ampere
receptacles that additionally provide Class 2 power in the
form of a USB charger to be listed and constructed such
that the Class 2 circuitry is integral with the receptacle.

Chapter FOUR -
Equipment for
General Use
2017 NEC
REVISION: 406.12 -Tamper-Resistant
Receptacles
The proposed requirement expansion would bring
tamper-resistant safety devices to areas that small children
frequently occupy.
New locations include:
Preschools
Elementary
Education
Business offices
Corridors
Waiting rooms
Clinics
Medical Offices
Dental Offices
Outpatient facilities
Gymnasiums
Skating Rinks
Auditoriums
Dormitories

Chapter FOUR -
Equipment for
General Use
2017 NEC
REVISION: 408.3(A)(2) - Barriers at
Service Panelboards, Switchboards,
and Switchgear
Panelboards have been added to the type of service
equipment, along with switchboards and switchgear, that
will require barriers to be placed in these service
enclosures to prohibit uninsulated, ungrounded service
busbars or service terminals from being exposed to
inadvertent contact by persons or maintenance equipment
while servicing load terminations.

Chapter FOUR -
Equipment for
General Use
2017 NEC
NEW: 409.23 - Available Fault Current
(Industrial Control Panels)
New provisions were proposed for a field marking
requirement for industrial control panels indicating the
available fault current.This proposed field marking would be
similar to the available fault-current field marking requirements
of 110.24(A).

Chapter FOUR -
Equipment for
General Use
2017 NEC
REVISION: 422.16(B)(2) - Built-in
Dishwashers
Proposed revisions would allow only the receptace outlet for
a cord- and plug-connected dishwaster to be located in the
space adjacent to the dishwasher.

Chapter FOUR -
Equipment for
General Use
2017 NEC
REVISION: 445.11 - Marking
(Generators)
The marking and nameplate requirements for all stationary
generators and portable generators rated more than 15kW
have been proposed to be revised to include not only the
power factor, the subtransient, and the insulation system class
but also the transient reactances, and the maximum
short-circuit current.

Changes to Chapter Five:
Special Occupancies
2017 NEC
Chapter FIVE - Special
Occupancies
2017 NEC

Occupancies
2017 NEC
RELOCATION: 500.2 - Definitions:
Hazardous (Classified) Locations
The existing definitions presently located at 500.2 have
been proposed to be relocated to Article 100 to comply
with the NEC Style Manual, which states that:
A definition used in two or more articles is required to be
located in Article 100.

Occupancies
2017 NEC
REVISION: 501.10(B)(1) - Wiring
Methods for Class 1, Division 2
The wiring methods permitted for Class 1, Division 2
locations have been proposed to be expanded to include
rigid metal conduit (RMC) and intermediate metal conduit
(IMC) with listed threadless fittings, along with the addition
of electrical metallic tubuting (EMT) with listed fittings.

Occupancies
2017 NEC
NEW:Tables 511.3(C) and 511.3(D): Tables
for Major and Minor Repair Garages
In order to align with NFPA 30A, 511.3(C) and 511.3(D)
are proposed to be replaced respectively in their entiretey
with new tables.
511.3(C): Covering both major and minor repair garages
where heavier than air gaseous Class 1 liquirds are
transferred or dispensed.
511.3(D): Covering major repair garages where vehicles
using lighter than air gaseous fuels are repaired or stored.

Occupancies
2017 NEC
REVISION: 517.2 - Definitions: Health
Care Facilities
Health Care Facilities will now include buildings, portions
of buildings, or “mobile enclosures” in which human
medical, dental, psychiatric, nursing, obstetrical, or surgical
care is provided.

Occupancies
2017 NEC
REVISION: 517.31(B) - Essential
Electrical SystemsTransfer Switches
Assuring that all transfer switches of all of the branches of the
essential electrical system meet the same requirements as
emergency systems found in other types of occupancies will
help the health care facility’s essential electrical system protect
paitients and health care personnel during times of
emergencies and/or disasters.

Changes to Chapter Six:
Special Equipment
2017 NEC
Chapter SIX - Special
Equipment
2017 NEC

Equipment
2017 NEC
NEW: 600.34 - Photovoltaic (PV)
Powered Signs
This new section of NEC Article 600 will provide rules for
field wiring and the installation and safe usage of
PV-powered signs.This section is also intended to
harmonize Article 600 with Article 690 and the end use of
PV signs constructed per UL 48.

Equipment
2017 NEC
NEW: Article 680 PartVIII - Electrically
Powered Pool Lifts
This proposed new part to Article 680 attempts to permit
a compliant installation with adequate safety requirements
for all swimming pool users, and would cover:
Listing & Labeling Requirements
GFCI Protection for Personnel
Bonding Requirements
Switching Devices
Nameplate Info. & Requirements

Equipment
2017 NEC
DELETION:Table 680.10 - Minimum
Cover Depths - Swimming Pools
CMP-17 determined that all underground wiring should be
installed per the burial depths of Table 300.5, thus
eliminating the requirement for Table 680.10.

Equipment
2017 NEC
REVISION: 690.8(A)(1) - Calculation of
Maximum PV Sourse Circuit Current
The substantiation of this revision points out that an
engineer qualified to design PV systems is capable of
making the necessary calculations or running the
necessary simulations to develop accurate maximum
circuit currents of PV sourse cicruits based on the specifics
of an installation location.

Equipment
2017 NEC
NEW: 695.15 - Surge Protection for
Fire Pumps
A new provision was proposed for fire pumps that would
require a listed surge protection device to be installed in or on
the fire pump controllers.
The NFPA Fire Protection Research Foundation discovered
that 12% of the fire pumps tested had damage due to voltage
surges.

Changes to Chapter Seven:
Special Conditions
2017 NEC
Chapter SEVEN -
Special Conditions
2017 NEC

Chapter SEVEN -
Special Conditions
2017 NEC
NEW: 700.3(F) -Temporary Source of
Power for Maintenance or Repair of
the Alternate Source of Power for
Emergency Systems
New perscriptive language was proposed to be added to
700.3 detailing requirements, along with an exception, that
recognizes whether a permanent switching means to
connect temporarily an alternate source of power (such as
a generator) is or is not required.

Chapter SEVEN -
Special Conditions
2017 NEC
NEW: 700.25 - Branch Circuit
Emergency LightingTransfer Switch
This would permit emergency lighting loads supplied by
branch circuits, rated at not greater than 20 amperes, to be
transferred from the normal branch circuit to an emergency
branch circuit using a listed branch-circuit
emergency-lighting transfer switch.

Chapter SEVEN -
Special Conditions
2017 NEC
REVISION: 770.24 - Mechanical Execution
of Work: Optical Fiber Cables
Revisions to 770.24 were proposed to require protection
against physical damage to optical fiber cables in
accordance to all of 300.4 - not just 300.4(D) through (G)
as is currently required.

Changes to Chapter Eight:
Communication Systems
2017 NEC
Chapter EIGHT -
Communication
Systems
2017 NEC

Chapter EIGHT -
Communication
Systems
2017 NEC
REVISION: 840.48 - Unlisted Wires and
Cables Entering Buildings for
Premises-Powered Broadband
Communications Systems
In order to expand the coverage of Article 840, there is a
proposal to recognize both twisted pair and coaxial
cable-based systems in addition to optical fiber-based
systems.

2017 National Electrical Code©
A Preview of Proposed Changes
Join TPC Training Systems and TPC Trainco as veteran
electrical instructor Bob Clukey provides an overview of
the key areas of change and expansion coming in the 2017
National Electrical Code©
.
Infomational Webinar:
Thursday, July 28th, 2016
11:00AM - 12:00PM CDT
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National Electrical Code
2017 NEC

Proposed Changes & Revisions to the 2017 National Electrical Code©

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