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25.20 The insulated conductors of the supply cord for type Y attachment and type Z* s7 G: }0 R* y4 g
attachment shall be additionally insulated from accessible metal parts by basic insulation' B( ]. R$ K. m! C: X/ g
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary
: q; ]* s- w' J1 J+ R# kinsulation for class II appliances. This insulation may be provided by the sheath of the
/ @; C' J4 m6 V) F+ Csupply cord or by other means.
7 P6 L. O6 z, D3 b/ @; k* qCompliance is checked by inspection and by the relevant tests.
& R: N6 J& m2 P/ T6 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:% Q; K8 u( M* G8 u- C6 @! \: P
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?
# ^/ ~, X$ v' t! q- N. c4 Q. T# X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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