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this is what code says:
. T" S2 R8 V( U1 s4-028: Identification of insulated neutral conductors up to and including No. 2 AWG% V! P$ Z* V5 X) e
copper or aluminum3 d- M4 a: \6 b
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
7 A* _! r6 m' c6 @3 _No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to* s! x s& r: e$ f8 M; {7 Q; r
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
2 u* x+ C$ R4 }* K- lalong the entire length of the conductor." |% J7 B0 Y, _1 C9 a$ k3 |8 b+ _
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
* F$ o* z% e4 w: }and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
2 X( F- |' `2 H+ g B Icircuit conductor of the other system, if present, shall be provided with a specific identification, and the
5 P5 v) `7 L7 ], m6 ^5 b+ Midentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not: O! \9 H2 J5 i+ N
green) running along the insulation.
4 {' t2 @- n+ a' g3 w S. @(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of/ ]. C, I" f& o7 O+ L
an identified conductor; however, in the case of those flexible cords where the identified conductor is: Q* \; L! ^& F( z# N4 V4 m
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.' \. B" v b2 B6 F
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked+ r2 O L4 I6 Y5 a6 H7 h; q0 C) ]% b
as the identified conductor by painting or other suitable means at every point where the separate0 _# m; l" ?% X1 n [, ^* @ U
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and7 ], E& u; Q0 ]/ [. q
the painting or other suitable means of marking the identified conductor shall not be permitted to render
0 u+ r; B/ u" cillegible the manufacturer’s numbering of the conductor. |
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