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this is what code says:
1 Y. U" C" U& I: v. ~/ y4-028: Identification of insulated neutral conductors up to and including No. 2 AWG9 q' E- Q! F3 j% \* x; c1 y4 `
copper or aluminum. s* a5 \/ t& D9 N+ K
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including3 t+ W4 p! b$ r7 o7 e1 X' I
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to+ ?1 n4 K3 k) x& v
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
- z/ a# `4 p2 H& ialong the entire length of the conductor.* y5 T! E- t2 D c, l( W+ i
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure) j! h1 ?5 b+ ` Y7 p5 N
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified1 E8 ~0 J. P" A1 C$ P9 k: s8 z
circuit conductor of the other system, if present, shall be provided with a specific identification, and the7 j2 ^3 P3 A) t! `( L. B
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
! Q4 y" K# i9 o" x* J: P5 Jgreen) running along the insulation.7 I/ k4 C' |* K; C
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of9 \+ ]! Z/ F1 P( c% n$ U5 h
an identified conductor; however, in the case of those flexible cords where the identified conductor is
2 \% S0 N( S/ g1 Z1 p( midentified by a raised longitudinal ridge(s), the other conductors shall have no ridges. u' z' n4 ^: E; ? x) ^. M# L% a+ ?
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked. z" |: ^# _$ Q( I
as the identified conductor by painting or other suitable means at every point where the separate5 P: }- {+ [" U+ h$ r. g+ n
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
+ [/ t, \: K2 X9 kthe painting or other suitable means of marking the identified conductor shall not be permitted to render
0 U) w% W+ Z$ E9 Hillegible the manufacturer’s numbering of the conductor. |
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