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this is what code says:
/ C+ c, h- [, _2 `& z4-028: Identification of insulated neutral conductors up to and including No. 2 AWG" @8 M( F7 I0 v$ |6 Q" o0 o
copper or aluminum
3 b; H4 @9 J. {3 \# [: J4 I(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including! T" W/ h1 r' t8 Z! ~/ m
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to
3 Q1 K! ]4 k# |9 R: T h! G. Vsuch neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
- Q2 \ T4 W' \5 Valong the entire length of the conductor.; V6 C/ f0 z7 \
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
b8 E c! G2 z V, }and the identified circuit conductor of one system is coloured by a white or grey covering, each identified& W* Y/ M2 Y5 w( ]$ y3 V# N
circuit conductor of the other system, if present, shall be provided with a specific identification, and the
s6 z9 a* p0 l8 kidentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not! m: w3 q( z8 X5 z; t3 w+ {0 k
green) running along the insulation.# N* a) |' g! B" {
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of1 i* [9 C, f3 @4 ~3 H! k$ g* k- h
an identified conductor; however, in the case of those flexible cords where the identified conductor is
' p% ]1 [4 }/ p( [2 U* Kidentified by a raised longitudinal ridge(s), the other conductors shall have no ridges.0 H- V& b1 Y1 ?4 X5 q1 \/ i9 f1 g' Q
(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked1 Q! p" `6 @. W* y7 I7 ^- ]
as the identified conductor by painting or other suitable means at every point where the separate
A" G# }) E$ a1 A: Z' Fconductors have been rendered accessible and visible by removal of the outer covering of the cable, and( a9 F: \- h# J& f v I+ Y; N
the painting or other suitable means of marking the identified conductor shall not be permitted to render
1 `; G, d3 |9 h3 i$ A6 p9 B) Aillegible the manufacturer’s numbering of the conductor. |
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