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楼主 |
发表于 2013-10-10 17:38
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地瓜 发表于 2013-10-10 15:50 
5 s; W& ^4 }; e- `+ y6 [- g8.1.3写的是针对 live parts of visibly glowing heating elements···也就是说只有在这类元件才用prob ... : v( }2 u. ?# c: Y% e
除了live parts of visibly glowing heating elements·外,还有live parts of all poles of which can be disconnected by a single switching action.
8 e& x% w- {, A$ }' ?/ b- wNOTE For appliances provided with a supply cord and without a switching device in their supply circuit, the withdrawal of the plug from a socket-outlet is considered to be a single switching action. |
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