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this is what code says:
% g3 t& z6 V1 X+ `7 x8 R# w3 V4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
+ I' c1 `+ ]9 ?4 D; x2 O5 N vcopper or aluminum5 a5 ?; V0 I: q6 f) b- E6 v6 U
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
% g: Q$ |3 B/ F K( T, d E/ y) ^; gNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
) K9 B% h- v" G& n0 F! N+ Esuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
6 o3 [4 c1 e/ V# g" e n) ralong the entire length of the conductor.2 b' T% \; @/ M% @1 Z8 m( Y
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
+ F. `" B$ H( E. g2 Yand the identified circuit conductor of one system is coloured by a white or grey covering, each identified
* @: p4 \0 p& T. t* ~ Wcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
1 x* Y3 R7 z: i9 {identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
6 e3 l3 T# D! o9 egreen) running along the insulation.
) \3 H5 T( I8 N1 [+ c# ?(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
& \) s e, z( Z+ s* a4 `6 I# man identified conductor; however, in the case of those flexible cords where the identified conductor is
, u+ S* ^ L. B# j( _identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
" g& E4 s$ m- U2 J(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked" z9 [/ M& a6 P, k% J
as the identified conductor by painting or other suitable means at every point where the separate! T$ Q$ n) c6 j& q2 ]* L( X
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
3 b8 T% T) [+ b0 [, qthe painting or other suitable means of marking the identified conductor shall not be permitted to render/ m7 f ~- S. t) H, `' g& N. A
illegible the manufacturer’s numbering of the conductor. |
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