引用第2楼godxlalp于2011-08-10 10:48发表的 :. e4 J; R# i6 i. P
UL 中CLASS 2是指工作电路符合SELV电话
引用第4楼Liu于2011-08-10 12:58发表的 :/ M7 E- A4 [8 V+ t T4 ?9 F
参考 NFPA 70 National Electrical Code® $ w% M& y { ?; I9 x
725.2 Definitions.
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Class 2 Circuit. The portion of the wiring system between the load side of a Class 2 power source and the connected equipment. Due to its power limitations, a Class 2 circuit considers safety from a fire initiation standpoint and provides acceptable protection from electric shock." `' h& ^4 ~/ d! M% u0 d) C9 I* f
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引用第5楼a049405于2011-08-11 08:37发表的 :
如果谁出来把UL1310 28章节,30章节详细的剖析一下就好了
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