010 Nonmetallic-sheathed cable.
(1) The building classification, for
subsections (2), (3), and (4) of this section, will be as determined by the
building official. For the purposes of this section, Type III, IV-HT and V may
be as defined in the International Building Code adopted in the state of
Washington. The installer must provide the inspector documentation
substantiating the type of building construction and finish material rating(s)
prior to any electrical inspection.
(2) This section replaces NEC 334.10(2). In
multifamily dwellings, Type NM, Type NMC, and Type NMS cable(s) may be used in
structures of Types III, IV-HT, and V construction except as prohibited in NEC
334.12.
(3) This section replaces
NEC 334.10(3). In all other structures, Type NM, Type NMC, and Type NMS
cable(s) may be used in structures of Types III, IV-HT, and V construction
except as prohibited in NEC 334.12. All cable(s) must be concealed within
walls, floors, or ceilings that provide a thermal barrier of material that has
at least a 15-minute finish rating as identified in listings of fire-rated
assemblies.
(4) This section
replaces NEC 334.10(4). Cable trays in structures of Types III, IV-HT, and V
construction, where the cable(s) is identified for the use, except as
prohibited in NEC 334.12.
015 Exposed work.
(5) Where Type NMC cable is installed in
shallow chases in plaster, masonry, concrete, adobe or similar material, the
cable must be protected against nails or screws by:
(a) A steel plate at least 1/16 inch thick
and covered with plaster, adobe, or similar finish; or
(b) Being recessed in a chase at least 2 3/4
inches deep, as measured from the finished surface, and covered with plaster,
adobe, or similar finish. The cable(s) must be at least 2 1/2 inches from the
finished surface.
(6)
The requirements for nonmetallic sheathed cable protection in NEC 334.15(C) do
not apply in crawl spaces.
(7) Wet
or damp locations prohibited in
NEC 334.12(B)(4) do not include the interior of
conduits installed outdoors used for physical protection of NM cables under the
following conditions:
(a) Cables emerging from
a building interior, attic, or crawl-space remain unbroken until terminated;
and
(b) Flexible metal conduits are
not used; and
(c) No conduit
systems are longer than 10 feet or below grade; and
(d) Conduits are sealed to prevent air
movement and are arranged to naturally drain.
Notes
Wash. Admin. Code §
296-46B-334
Amended by
WSR
17-12-021, Filed 5/30/2017, effective
7/1/2017
Amended by
WSR
20-11-053, Filed 5/19/2020, effective
7/1/2020
Amended by
WSR
20-14-083, Filed 6/30/2020, effective
10/29/2020
Amended by
WSR
24-05-085, Filed 2/21/2024, effective
4/1/2024
Statutory Authority:
RCW
19.28.006,
19.28.010,
19.28.031,
19.28.041,
19.28.061,
19.28.101,
19.28.131,
19.28.161,
19.28.171,
19.28.191,
19.28.201,
19.28.211,
19.28.241,
19.28.251,
19.28.281,
19.28.311,
19.28.321,
19.28.400,
19.28.420,
19.28.490,
19.28.551. 08-24-048, §
296-46B-334, filed 11/25/08, effective 12/31/08; 05-10-024, § 296-46B-334,
filed 4/26/05, effective 6/30/05. Statutory Authority:
RCW
19.28.006,
19.28.010,
19.28.031,
19.28.041,
19.28.061,
19.28.101,
19.28.131,
19.28.161,
19.28.171,
19.28.191,
19.28.201,
19.28.211,
19.28.241,
19.28.251,
19.28.271,
19.28.311,
19.28.321,
19.28.400,
19.28.420,
19.28.490,
19.28.551, 2003 c 399, 2003 c 211,
2003 c 78, and 2003 c 242. 04-12-049, § 296-46B-334, filed 5/28/04,
effective 6/30/04. Statutory Authority:
RCW
19.28.006,
19.28.010,
19.28.031,
19.28.041,
19.28.061,
19.28.101,
19.28.131,
19.28.161,
19.28.171,
19.28.191,
19.28.201,
19.28.211,
19.28.241,
19.28.251,
19.28.271,
19.28.311,
19.28.321,
19.28.400,
19.28.420,
19.28.490,
19.28.551, 2002 c 249,
chapters
34.05 and
19.28 RCW. 03-09-111, §
296-46B-334, filed 4/22/03, effective
5/23/03.
