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25.20 The insulated conductors of the supply cord for type Y attachment and type Z' }! s0 n( l* c3 b: F1 T7 c# @' p' {
attachment shall be additionally insulated from accessible metal parts by basic insulation ^7 I1 L7 S$ A# Z! V \
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary P* _. b5 u: d$ Q6 P8 J/ x
insulation for class II appliances. This insulation may be provided by the sheath of the Y3 }: |# a. r$ J. I
supply cord or by other means.
V1 T0 {' F+ x% w9 K. KCompliance is checked by inspection and by the relevant tests.7 S1 Z5 R/ j ]
各位师兄,我对这点一直很疑惑,大家能发表下自己的理解吗?我的理解是如下:
2 k: P. _5 S) E, l6 x( c3 D随便举个例子(烤箱),电源线进去不是有一段剥掉外表皮的一截线吗?那个就应该是insulated conductors of the supply cord,不知道我理解的对吗?如果是这样的话,那剥掉外皮的那段就不能碰到接地金属外壳了(class I), 而需要再加一层基本绝缘才能符合上面所说?请问大家我理解的对吗?' _) R2 K& V5 S* [
如果是这样的话,我又有个疑惑:既然剥掉外皮的电源线不能接触接地的外壳,那我们一般所指的internal wire怎么就可以直接接触带接地的外壳呢?# x4 I" \2 u0 f# C2 u; f+ ^
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