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this is what code says:
: U1 }" l! }% F2 p; \ }: D4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
' l9 y, g( D/ P& x7 \+ Ocopper or aluminum3 x$ s* h$ I4 D+ I0 ~, v6 h
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
6 i) E1 [1 S2 E) u, X! mNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
8 t2 M9 H. u$ o3 Bsuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
) x' {5 z( @/ ^) \along the entire length of the conductor.
; d' v5 ?4 C- Z* T1 F7 v' B(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure$ I9 L& b- @# ~9 S
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified6 q H1 A: x- D# s% Y( R( v; M
circuit conductor of the other system, if present, shall be provided with a specific identification, and the; |# O( j4 M( |7 r$ a
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
) g$ c' p0 g# _$ b, X) ^( g; @! Sgreen) running along the insulation.5 W: p' M0 x% c0 S: o4 |/ X
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of' @* h# W/ ?3 I k& a# q
an identified conductor; however, in the case of those flexible cords where the identified conductor is
t. \2 D( L8 o, V1 K2 C1 G% E; R) G. fidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
7 \0 v; ^' C! q& z(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
/ \" B4 ?- b$ a" W9 @as the identified conductor by painting or other suitable means at every point where the separate% [3 a5 V$ ~3 k
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
! `8 I# V. @9 p1 ]the painting or other suitable means of marking the identified conductor shall not be permitted to render3 k& B; g- [. R
illegible the manufacturer’s numbering of the conductor. |
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