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this is what code says:
' i/ x4 H7 \7 H: x4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
$ Y1 m0 z q9 E$ N8 T5 H+ Z5 I# t8 ]copper or aluminum4 y7 v+ y! N6 t6 p! ]5 Z- T" g8 p: Y
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including, ~, T* b3 [" y2 u" d
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
x- S! R7 Y& X1 ?/ B+ `! C7 osuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
8 ]7 g- f8 G5 T Q" ?6 ?0 @along the entire length of the conductor.! L. Q5 {4 h! N9 [- W3 H
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure% H% c* H* J/ _/ r
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
4 W" ^1 M8 M2 T5 @; [7 F, }* I9 lcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
8 |0 B' e5 }4 ^/ k. \$ t, u+ R1 E6 Ridentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
, Z8 b) f- ?: W# `7 x2 e {3 s8 Agreen) running along the insulation.* {1 C! v% f! c6 N/ p9 s9 ~% a
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
! O6 c: L# y6 t7 o' Xan identified conductor; however, in the case of those flexible cords where the identified conductor is
2 e' ^9 T5 e& Kidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.% n: m* |$ ?" `; J2 g! `% z, L& V/ I
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
; A2 {: l5 [3 k1 k5 F& |2 kas the identified conductor by painting or other suitable means at every point where the separate
( z$ F" E2 e% W( H' I5 o4 ]conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
2 s7 ]! T n# E: o6 G* r, Jthe painting or other suitable means of marking the identified conductor shall not be permitted to render2 O; i: i$ F5 V
illegible the manufacturer’s numbering of the conductor. |
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