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25.20 The insulated conductors of the supply cord for type Y attachment and type Z3 c% ?5 C: W7 M) g: Y1 p
attachment shall be additionally insulated from accessible metal parts by basic insulation
( b; n6 n8 J- Y) s5 Y- _( B6 `for class 0 appliances, class 0I appliances and class I appliances, and by supplementary+ f% I7 X, l1 P" T4 d4 h" w
insulation for class II appliances. This insulation may be provided by the sheath of the
3 u: \% R3 [( u0 ]supply cord or by other means.
' @" v3 W+ D5 A) |% aCompliance is checked by inspection and by the relevant tests.$ f0 F+ p2 ]* p: ~: Z- P
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:$ T2 S9 E3 ^5 W$ i# \! w0 D$ ^4 z
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?8 i/ V3 D" h& n
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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