|
25.20 The insulated conductors of the supply cord for type Y attachment and type Z
) C& Q3 E+ Z. H9 F2 k5 L% rattachment shall be additionally insulated from accessible metal parts by basic insulation% n* c- ?' E# b. a* h o
for class 0 appliances, class 0I appliances and class I appliances, and by supplementary2 c# g O* m) o! D f
insulation for class II appliances. This insulation may be provided by the sheath of the5 q7 w1 D0 A: H# S% e) m& r
supply cord or by other means.
: B( R9 L6 Q" U2 R- b' G! w B. s" ICompliance is checked by inspection and by the relevant tests.
3 z m' j g( Q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:" B# t( E- y7 I4 B) \: H) g
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?
/ D( G; x, M. {0 O( A7 _3 H% 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?
1 q! @( r+ C0 J6 g V) { |
|