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你可以参考UL62：
8 j$ X! L4 s0 N3 M8 I4.1.9.1 Conductors shall be distinguished as follows:; M5 h: \( [1 ?1 C9 `" {
(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and# e; G3 |( [( s8 T9 Y8 [
these colours shall be restricted to such use:6 X6 F/ |( G, Z! E* N2 }
(i) white or grey coloured braid;
: b* O( |) ^# A! _(ii) white or grey coloured insulation; for jacketed cords furnished with appliances, one
) t) j8 F2 g# K! ~$ }conductor may be light blue with the other conductors readily distinguishable from white
7 [8 E: @/ U! n; `5 z: Y) Sor grey;2 T' [7 t! _( ^9 F$ e C4 T! T
(iii) white or grey coloured separator in integral constructions only;
5 Y* \5 ?! @. I(iv) tinned conductor on integral constructions only; or8 g& U# d* G K
(v) one or more grooves, ridges, or white stripes on the exterior of integral
9 q7 z' ~8 F; G0 X Aconstructions only.
2 L7 _* @8 L0 @9 @' E9 [& A7 g(b) Grounding conductors shall be distinguished by the colour green or a combination of the- E; w- D2 U/ T: g
colours green and yellow. On a grounding conductor coloured green, one or more yellow stripes* w( g) j; ], X& K) z8 x
that cover no less than 5% and not more than 70% of the calculated circumference of the% |; L, a4 R: N6 f" d" \8 n
finished conductor insulation shall be permitted. |
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