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this is what code says:
4 r; h" G4 g: Q% M4-028: Identification of insulated neutral conductors up to and including No. 2 AWG
7 B* h; Q1 m' _2 z4 ?+ y6 g3 Mcopper or aluminum( C, Y, Z7 x+ |$ [! {* C/ ]
(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including( A) H7 ^. m$ W" |5 L
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to' T2 ]( a, Q7 K
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes) W$ v* m3 x0 V8 I# `( c( G6 F2 x( x
along the entire length of the conductor.) N+ o8 z3 n/ ~, Y
(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure- _3 V6 n6 | U
and the identified circuit conductor of one system is coloured by a white or grey covering, each identified
. i* r7 j6 k0 w( ]circuit conductor of the other system, if present, shall be provided with a specific identification, and the
% |, t0 l x' o' Eidentification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not# m9 | r3 B- F& j4 [! g2 _
green) running along the insulation.5 v8 g7 z8 n- L4 ]9 f
(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of; h4 P3 d$ t* }2 V9 P
an identified conductor; however, in the case of those flexible cords where the identified conductor is6 L4 a2 U5 Q: {7 I2 P8 l( R
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
4 ?: [0 y# ?+ P9 f(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
0 A# ~1 T6 J* u) e5 s$ ]5 d6 Was the identified conductor by painting or other suitable means at every point where the separate
2 q V0 m. Q3 q- ]9 [ [* Zconductors have been rendered accessible and visible by removal of the outer covering of the cable, and N& Y$ V |' y$ U- `8 w! Q
the painting or other suitable means of marking the identified conductor shall not be permitted to render
& R' I& \/ ]) a, Q. killegible the manufacturer’s numbering of the conductor. |
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