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this is what code says:
+ X8 W. z( ]& H4 s4-028: Identification of insulated neutral conductors up to and including No. 2 AWG- l) J: O2 P W5 k; D! ~/ j# o* n
copper or aluminum
# G& b9 l. e* i O. [(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including- U' n8 _$ y8 X; Y9 m; f" N; J
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
$ K8 s+ {9 n! N' p3 r) l) Zsuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes7 L4 h, u7 c! l! N2 q
along the entire length of the conductor.
+ h+ J: ~3 z# U. P) a+ D(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure [1 f3 ^. o. T- ]! w) |
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified+ R% ^% n+ j; J6 J: t
circuit conductor of the other system, if present, shall be provided with a specific identification, and the' W' k9 P0 a8 _% M' [* [! ^- {
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
' Y! ~/ l7 x. ~5 C5 h' cgreen) running along the insulation.
, s; D) G D& A5 M5 \3 H(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
) r2 o5 k- w& A, B( v7 _0 Van identified conductor; however, in the case of those flexible cords where the identified conductor is
7 }: Y- l2 g2 X, s' ~1 X4 Xidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
* D+ @+ \" U2 R2 d! `$ O; a(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked; h* N! R4 s( Q
as the identified conductor by painting or other suitable means at every point where the separate( L1 }6 G; M% b4 b3 @
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and C4 S6 {$ q3 K6 u e9 I, q# }, L- s
the painting or other suitable means of marking the identified conductor shall not be permitted to render; `( K4 E; L) @! m. |+ e
illegible the manufacturer’s numbering of the conductor. |
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