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this is what code says:
, R/ h a* @+ ~3 o. I2 r4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
! R3 O1 U! @) R% `; P7 _& ]copper or aluminum. C% h- x/ @" } k! t
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including7 |$ \8 U$ M, Q! d9 t# ^! k
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
' ?6 ?7 W1 j# H: B, f& z9 lsuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes: |6 i" ?6 Q9 Q2 X" ]- }
along the entire length of the conductor.
" Y( G+ ~- N. Z/ v6 k# X3 m(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
9 c8 q( \$ [5 @6 oand the identified circuit conductor of one system is coloured by a white or grey covering, each identified2 X5 ?% B! T) v% _2 X0 y4 Y4 K. W9 l0 t
circuit conductor of the other system, if present, shall be provided with a specific identification, and the1 `/ A; Y" P0 L' g7 @4 ^7 i
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not @) Q2 z1 \/ ^5 m
green) running along the insulation.0 C0 H! I- Q3 i
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of5 j2 [7 c+ W2 u9 o/ p
an identified conductor; however, in the case of those flexible cords where the identified conductor is8 V6 r: p% S- d* ?
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
/ r# [% }" U$ Y9 L( P(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked2 c8 H* ^" s# L* h
as the identified conductor by painting or other suitable means at every point where the separate7 [7 ~8 U7 ^0 N2 ? k4 q6 M! E
conductors have been rendered accessible and visible by removal of the outer covering of the cable, and2 k2 V2 n7 z4 B% o
the painting or other suitable means of marking the identified conductor shall not be permitted to render
/ D5 u3 g0 T& ^3 Q* ~% H1 V# [; q! Villegible the manufacturer’s numbering of the conductor. |
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