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this is what code says:
; s2 p0 w; h5 A% A' \4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
$ n# y# l6 T, u5 Q. [7 f X bcopper or aluminum9 P0 Y0 T- h* G& G, C
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including
& O$ S4 q1 \( p0 p; YNo. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
9 c/ a% L' i8 u# U$ z- usuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
, m$ \3 F: E- u) m C4 W- galong the entire length of the conductor." \ I9 V" w" ^
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure0 s7 x, O2 ^- I9 A. Z8 Y7 s0 Z
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
' v7 i5 X( T( l0 Xcircuit conductor of the other system, if present, shall be provided with a specific identification, and the
7 |* ]/ p( {7 T+ U4 s! oidentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not
8 g& w) I9 i3 X' t; h. s4 ogreen) running along the insulation.5 K# o5 z9 ]1 r2 ]+ X
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
8 l& d" s5 [ t- F) N9 q8 A8 ean identified conductor; however, in the case of those flexible cords where the identified conductor is
$ O. _8 M, b n; c( Qidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.# Z: B4 z; O9 O+ L) `. c: U) C6 e
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
$ L4 k3 I6 Q; P8 Las the identified conductor by painting or other suitable means at every point where the separate( r* A% [2 F8 m+ d
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and
4 D, ?0 a0 |: D. [# ^1 Wthe painting or other suitable means of marking the identified conductor shall not be permitted to render
% y# ~0 \8 |7 Dillegible the manufacturer’s numbering of the conductor. |
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