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25.20 The insulated conductors of the supply cord for type Y attachment and type Z
u" k$ r2 K3 f) M0 c pattachment shall be additionally insulated from accessible metal parts by basic insulation6 v. {3 U6 X( v8 k
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary9 k! f$ Z3 Z# y \( ^+ a
insulation for class II appliances. This insulation may be provided by the sheath of the
* R2 N+ Z* L$ B e* N7 j3 ?+ ssupply cord or by other means.
9 B4 H7 I" q+ U2 zCompliance is checked by inspection and by the relevant tests.
4 A. k7 u* L0 j" D- R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:
a1 K8 \* b6 t; K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?
2 X! E% p! ?8 l( b3 s$ b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?
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