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你可以参考UL62：5 s* O+ h# {, E7 n* H
4.1.9.1 Conductors shall be distinguished as follows:& _4 \7 ^: I" b1 @. q+ J2 |
(a) Grounded (neutral) conductors shall be distinguished by one of the following methods, and) I. z! w* Q5 N
these colours shall be restricted to such use:
?% x O: |. `) n1 l& |(i) white or grey coloured braid;
( ]' z1 ] b9 O" Z1 ~# L(ii) white or grey coloured insulation; for jacketed cords furnished with appliances, one
P$ S& _, p! S' qconductor may be light blue with the other conductors readily distinguishable from white
: }' o# A/ v. p Q1 |or grey;
0 J; b5 a9 N$ n, @( [& H8 {7 k4 d(iii) white or grey coloured separator in integral constructions only;
" ]# s1 c) U* B" E6 s7 L(iv) tinned conductor on integral constructions only; or
$ q1 A. \$ E b8 m! Z. Q$ h; r(v) one or more grooves, ridges, or white stripes on the exterior of integral
3 j9 `9 ?' X2 w6 h6 l5 o9 X) cconstructions only.$ T3 f3 i3 v, e5 H9 p8 p4 _
(b) Grounding conductors shall be distinguished by the colour green or a combination of the# K% a, m* a1 b) |, b
colours green and yellow. On a grounding conductor coloured green, one or more yellow stripes" I) ^7 ?1 b7 k$ o! H, C, F
that cover no less than 5% and not more than 70% of the calculated circumference of the
0 ?0 J( r2 Z) Q, `# lfinished conductor insulation shall be permitted. |
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