Current through Register Vol. 35, No. 18, September 24, 2024
A.
Article 210. Branch circuits.
See this article of the NEC except as provided below.
(1)
Section 210.8 Ground-fault
circuit-interrupter protection for personnel. See this section of the
NEC except as provided below. Section 210.8 (F) Outdoor outlets.
See this section of the NEC and add the following exception: Exception No. 2
GFCI protection shall not be required for listed HVAC equipment.
(2)
Section 210.11 Branch circuits
required. See this section of the NEC except as provided below.
(a)
210.11 (A) Number of branch
circuits. See this section of the NEC and add: In dwelling units, branch
circuits for 125-volt, 15- and 20- ampere general purpose lighting and
receptacles outlets shall be limited to a maximum of ten (10) lighting and/or
receptacle outlets per branch circuit. Single and duplex receptacle outlets are
considered to be one receptacle outlet. Exception: Branch circuits serving only
lighting loads may be calculated per article 220 of the NEC.
(b)
210.11 (C) Dwelling units.
See this section of the NEC except as provided below.
(i)
(1)
Small appliance branch circuits. See this section
of the NEC and add: not more than four (4) 20 ampere 125 volt receptacle
outlets shall be connected to these circuits. Single and duplex receptacle
outlets are considered to be one receptacle outlet. Exception: small appliance
circuits that supply only dining area receptacles may serve not more than six
(6) receptacle outlets.
(ii) (2)
Laundry branch circuits. Delete the text of this section of the
NEC and substitute: in addition to the number of branch circuits required by
other parts of this section, at least one additional 20-ampere branch circuit
shall be provided to supply the laundry receptacle outlet. Such circuits shall
have no other outlets.
(3)
Section 210.19 Conductors - minimum
ampacity and size. See this section of the NEC except as follows:
(A) Branch circuits not more than 1000 volts:
(a)
General. See this section
and add: conductors for branch circuits shall be sized to prevent excessive
voltage drop.
(b)
Branch
circuits with more than one receptacle. Conductors of general-purpose
branch circuits supplying more than one receptacle outlet for cord-and-plug
connected portable loads shall have an ampacity of not less than the rating of
the branch circuit and shall be not less than 12 AWG CU or 10 AWG
CU-CLAD.
(4)
Section 210.52 Dwelling unit receptacle outlets. See this section
of the NEC except as follows:
(a)
Section 210.52 (A)(2) Wall space. See this section and add:
Exception: free-standing cabinets designed to be used as an eating or drinking
bar where stools or chairs are pulled up to a counter top which extends at
least one (1) foot from the front of the cabinet, shall not be considered as
wall space.
(b)
Section
210.52 (C)(2) Island and peninsular countertops and work surfaces. See
this section of the NEC except as follows: Section 210.52(C)(2)
subsection (a) delete this subsection and replace with the following:
Island countertop spaces. At least one (1) receptacle shall be installed at
each island countertop space with a long dimension of 600 mm (24 in.) or
greater and a short dimension of 300 mm (12in.) or greater.
(c)
Section 210.52 (G) Basement,
garages, and accessory buildings. See this section of the NEC and add:
receptacle outlets must be installed a minimum of eighteen (18) inches above
finished floor, in attached or detached garages.
(5)
Section 210.70 Lighting outlets
required. See this section of the NEC except as follows: Section
210.70 (A)(2) Dwelling units. See this section of the NEC and add a new
subsection as follows: (d) on single family dwellings at least one wall switch,
located within five (5) feet from each entrance or exit or automatic lighting
control such as a motion detector shall be installed to control exterior
illumination.
B.
Article 215. Feeders. See this article of the NEC except as
provided below: Section 215.1. Scope. See this section of the NEC
and add: approved wiring methods for feeders: nonmetallic-sheathed cable types
NM, NMC and NMS (Article 334), and service entrance cable type SER (Article
338), shall be permitted to be used for feeders in dwelling units providing
that the cables shall not pass through or under any other dwelling unit(s).
Underground feeder and branch circuit cable type UF cable (Article 340) shall
be permitted to be used underground for any occupancy, and indoors only in
accordance with nonmetallic-sheathed cable (Article 334) providing that the
cable shall not pass through or under any other dwelling unit(s).
C.
Article 225. Outside branch circuits
and feeders. See this article of the NEC except as follows.
(1)
Section 225.19 Clearance from
buildings for conductors of not over 1000 volts, nominal. See this
section of the NEC except as follows: Section 225.19(A) Above
roofs. See this section of the NEC but delete exception number two (2)
in its entirety.
(2)
Section
225.32 Location. Delete this section of the NEC and replace with the
following: The disconnecting means shall be installed either inside or outside
of the building or structure served. The disconnecting means shall be a readily
accessing location and comply with one of the following:
(1) Where the disconnecting means is located
outside the building or structure served, the disconnecting means enclosure
shall be installed within ten (10) feet from the building or structure and
visible, or on the exterior wall of the building or structure served.
(2) Where the disconnecting means
is installed inside the building or structure served, the disconnecting means
enclosure shall be located within forty-eight (48) inches from where the feeder
conductor raceway enters the building or structure.
Exception No. 1 - see this section of the NEC.
Exception No. 2 - see this section of the NEC.
Exception No. 3 - see this section of the NEC.
Exception No. 4 - see this section of the NEC.
D.
Article 230. Services. See this article of the NEC except as
provided below.
(1)
Section 230.24
Clearances. See this section of the NEC except as provided below:
(A)
Above roofs. Delete
exception no. 2 and exception no. 5 in their entirety.
(2)
Section 230.28. Service masts as
supports. See this section of the NEC and add: where a service mast is
used for the support of service drop conductors, it shall be a minimum two inch
(2") rigid metal conduit, intermediate metal conduit or must comply with local
utility requirements.
(3)
Section 230.31 Size and ampacity. See this section of the NEC
except as provided below:
(A)
General. See this section of the NEC and add: where the
underground service lateral is customer owned, the service lateral conductors
shall be sized to prevent excessive voltage drop. The maximum voltage drop on
the service lateral conductors shall not exceed five percent (5%). For the
purpose of this calculation, the ampacity shall be based on the calculated
demand load of the building or structure served. Customer owned includes all
non-utility owned or operated service lateral conductors.
(4)
Section 230.43. Wiring methods for
1000 volts, nominal, or less. See this section of the NEC but delete
subsection (1) open wiring on insulators, and subsection (6), Electrical
nonmetallic tubing (ENT).
(5)
Section 230.54 Overhead service locations. See this section of the
NEC and add a new section as follows: (H) overhead service support shall comply
with the serving utility requirements or be at least six inch by six inch (6" x
6") pressure-treated timber or equivalent round poles (minimum 6" diameter
crown) installed to a depth not less than four (4) feet below finish
grade.
(6)
Section 230.70
Service equipment - disconnecting means.
(a)
230.70 General.
(A)
Location. See this section
of the NEC and add: the disconnecting means for each occupant of a multiple
occupancy building shall be grouped at a common location.
(b)
230.70 General.
(A)
Location.
(1)
Readily accessible location.
Delete the text of this section of the NEC and substitute:
(i) Service disconnects located outside the
building or structure. Where theservice disconnect is located outside of the
building or structure it shall be located in a readily accessible location
within 48 inches of the metering equipment. Remote service disconnects that are
located not more than 10 feet from the building or structure shall be
considered to be located on the building or structure.
Exception: Where metering equipment is installed at the
utility transformer, the disconnecting means on the outside of the building
shall be installed within 48 inches from where the service conductors emerge
from the earth.
(ii)
Service disconnects located inside the building or structure. Where the service
disconnect is located inside of a building or structure it shall be located in
a readily accessible location within 48 inches from the metering equipment or
the service equipment enclosure shall be installed within 48 inches of where
the service conductors penetrate the building or structure.
(7)
Section 230.72 Grouping of disconnects.
(A)
General. See this section of
the NEC and add: all building or structure disconnects of each service shall be
grouped at one location and shall be separated by the least practical distance,
within sight of each other and not to exceed an overall distance of fifty (50)
feet.
E.
Article 250 - Grounding and bonding. See this article of the NEC
except as provided below.
(1)
Section
250.50 Grounding electrode system. See this section of the NEC and add:
on new construction, aconcrete encased electrode shall be considered available
and installed in compliance with NEC 250.52(A) (3). If a concrete encased
electrode is not present, then at least 20 feet of 2 AWG bare copper in direct
contact with the earth at a depth below the earth's surface of not less than
thirty (30) inches shall be installed in a continuous trench that is at least
twenty (20) feet in length, augmented with a minimum of two (2), eight (8) foot
grounds rods one at each end of the 2 AWG conductor.
(2)
Section 250.52 (A) Grounding
electrodes. (5) Rod and pipe electrodes. See this section of the NEC but
delete subsection (a) in its entirety.
(3)
Section 250.53 (A) (2) See
this section of the NEC and add the following exception: Exception No. 2 See
this section of the NEC and add: A single grounding electrode consisting of a
rod or plate may be utilized on temporary construction services rated 200
amperes or less.
(4)
Section
250.66 Size of alternating-current grounding electrode conductor. (B)
Connections to concrete-encased electrodes. See this section of the NEC
and add the following to the end: The grounding electrode conductor shall not
be smaller than 4 AWG copper.
(5)
Section 250.104. Bonding of piping systems and exposed structural steel.
(B) Other metal piping. See this section of the NEC and add: CSST gas
piping systems shall be bonded to the electrical service grounding electrode
system at the point where the gas service enters the building. The bonding
jumper shall not be smaller than (6) AWG copper wire.
(6)
Section 250.106. Lightning
protection systems. See this section of the NEC and add: Where a
lightning protection system is installed, the bonding of the gas piping system
shall be in accordance with NFPA 780, standard for installation of lightning
protection systems.
(7)
Section 250.118. Types of equipment grounding conductors. See this
section of the NEC and add the following new subsection: (15) an equipment
grounding conductor shall be installed in all branch circuit and feeder
raceways on or above a roof. The equipment grounding conductor shall be a wire
type sized in accordance with table 250.122.