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this is what code says:
) B9 u# N' O% ]( E7 D: i# |: @) U1 B4-028: Identification of insulated neutral conductors up to and including No. 2 AWG8 j$ @# p9 Q- R& T1 R* u3 C/ W
copper or aluminum
# [* ]& O' s7 K(1) Except as permitted in Subrules (2), (3), and (4), all insulated neutral conductors up to and including6 {" k' |4 r! \3 {) k
No. 2 AWG copper or aluminum, and the conductors of flexible cords that are permanently connected to4 G2 Y. b* L) Y/ y
such neutral conductors, shall be identified by a white or grey covering or by three continuous white stripes
/ }% ?: s. E( Xalong the entire length of the conductor.
3 l+ h5 w4 v' v' {6 o8 v/ s- Y(2) Where conductors of different systems are installed in the same raceway, box, or other type of enclosure
. T. j- z8 H7 w$ Mand the identified circuit conductor of one system is coloured by a white or grey covering, each identified1 f" Q* j6 `! s
circuit conductor of the other system, if present, shall be provided with a specific identification, and the6 J- t9 O0 I. ]- w7 {/ r
identification shall be permitted to be an outer covering of white with an identifiable coloured stripe (not8 | _/ z { g* P
green) running along the insulation.
. s' a- U. C# \' f(3) The covering of the other conductor or conductors shall show a continuous colour contrasting that of
! W2 s, I L6 ran identified conductor; however, in the case of those flexible cords where the identified conductor is, e" O" _0 p" L( \" Y8 I/ t
identified by a raised longitudinal ridge(s), the other conductors shall have no ridges.
9 p+ _: y+ G4 Z8 v- q5 M(4) For multi-conductor cable, the insulated neutral conductor shall be permitted to be permanently marked
# h2 X/ A" ^4 f; ]4 X) w4 Nas the identified conductor by painting or other suitable means at every point where the separate
4 O" n/ ], F+ F3 l/ Z% qconductors have been rendered accessible and visible by removal of the outer covering of the cable, and& B5 z1 E: v6 ?8 V
the painting or other suitable means of marking the identified conductor shall not be permitted to render5 R. N8 ]+ s5 A% h) r( r6 g8 |
illegible the manufacturer’s numbering of the conductor. |
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