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this is what code says:
. S5 Q& K( d9 ^9 i1 ]. T4-028: Identification of insulated neutral conductors up to and including No. 2 AWG$ } ]- s0 B$ l6 x( K
copper or aluminum
4 I+ k$ u4 V& p8 i9 W/ l. k(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including2 E) p# V$ u9 v1 q) @
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
5 I6 {' k! F. G7 h+ ?1 Ksuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes, G" d1 ?- D2 ?" r" a: y/ H
along the entire length of the conductor.
; L+ a; `2 q7 C+ t q- q(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure; N: z! p: ]; f, y
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
3 E# F0 @; j: X5 ]& r% mcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
% N: }; K" r/ B4 Cidentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
6 A" k$ {- N' g# I, D2 ]! J6 z; Zgreen) running along the insulation.
; K: c4 x: p" K3 e, u5 N+ n(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
l- M7 E2 C7 `! H- y5 V7 ban identified conductor; however, in the case of those flexible cords where the identified conductor is/ V9 k$ T: e" }# Y1 P2 v
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.4 o, R& e" F/ D/ c9 g
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked1 F; _; [& l3 w! o
as the identified conductor by painting or other suitable means at every point where the separate$ Z6 J2 i- _$ Q4 G! P) S2 W3 r3 _
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
4 Y7 h- [! }9 M, W2 rthe painting or other suitable means of marking the identified conductor shall not be permitted to render/ `. ^/ H, q* ^
illegible the manufacturer’s numbering of the conductor. |
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