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汗, 下了一堆原来是这个问题, 图片太误导了,这个没办法现在标准要求这样.
% {% S3 e3 b+ [3 K) C3类的plug 不能跟高压的混用, 是因为3类的pin脚有可能插入到标准的2类母差里面.7 k* @8 H, U0 t# [; D
Plugs and socket-outlets in SELV systems shall comply with the following requirements: – plugs shall not be able to enter socket-outlets of other voltage systems; – socket-outlets shall not admit plugs of other voltage systems; – plugs and socket-outlets in SELV systems shall not have a protective conductor contact, |0 Q6 B' B! C/ U2 {2 A8 ]4 U. {8 l$ j
4.3.31 以及5.2.14 都有描述.
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