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this is what code says:
4 P6 C8 y" v8 G1 l. M4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
8 M& ?2 o# |" J9 S1 Lcopper or aluminum/ u c; N5 i5 m8 Z& Z6 C' Y7 X
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
7 _, \) U+ r. f. i6 I. DNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to. [4 K+ W& j" y
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
; x* \; P' C/ w9 ~. A& A' T; yalong the entire length of the conductor.9 k1 F# C; R A- R7 z) u& R
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure3 h9 {* }8 ^3 |. r- W! V
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
% M4 m' u" c4 w& `circuit conductor of the other system, if present, shall be provided with a specific identification, and the5 `4 V) I7 O3 t
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
3 m/ K1 ~8 N3 P1 ]( q: c( Ugreen) running along the insulation.
7 V! F5 f7 d: u: e( a(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of# Y# d7 m8 ^ T3 r; b$ v8 l8 j
an identified conductor; however, in the case of those flexible cords where the identified conductor is
: T; v8 \5 V2 ]6 ^3 Q6 fidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
% m6 |- j9 C* g(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
1 b' {. T$ e4 ^# Ias the identified conductor by painting or other suitable means at every point where the separate `6 h- }5 W# L! i
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
1 p, Y" s {4 ?, othe painting or other suitable means of marking the identified conductor shall not be permitted to render
* ]4 W4 u- D8 m, r$ q& Willegible the manufacturer’s numbering of the conductor. |
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