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地瓜 发表于 2013-10-10 15:50 , t, q- Z( G: y# M
8.1.3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 ...
- V7 O8 i* S" ]( Z6 n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.
! r# \# _9 @0 F" S; R. f" B, cNOTE 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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