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25.20 The insulated conductors of the supply cord for type Y attachment and type Z, {6 J+ K$ M# I
attachment shall be additionally insulated from accessible metal parts by basic insulation
+ s8 w3 r" W! ^: o$ jfor class 0 appliances, class 0I appliances and class I appliances, and by supplementary
+ Y5 n" ?- H( |& Dinsulation for class II appliances. This insulation may be provided by the sheath of the" W: |: g0 f" _
supply cord or by other means.
' ~+ z: q7 S3 x/ ]/ `( v9 eCompliance is checked by inspection and by the relevant tests.
+ v0 @, t1 G% V2 {1 q1 \1 ~7 t8 W( l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:
& i. x' w k2 \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?: z# Y7 W* O- ?6 c! @# |7 u7 S B9 t
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?0 M- b3 S9 U, q+ G3 i: L
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