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1.2.4.3( [6 Q3 X" Q2 i
CLASS III EQUIPMENT0 P" d4 U1 q3 I( _
equipment in which protection against electric shock relies upon supply from SELV CIRCUITS
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HAZARDOUS VOLTAGE4 w6 `# x; G ?, T5 W
voltage exceeding 42,4 V peak, or 60 V d.c., existing in a circuit that does not meet the
' I! d2 N- `3 m. `3 A' Grequirements for either a LIMITED CURRENT CIRCUIT or a TNV CIRCUIT
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我个人也是觉得定义为三类设备有点勉强,电话机里面没有产生HAZARDOUS VOLTAGE这个可以说得过去,但是电话机连接到TNV电路,而TNV电路又不一定是SELV电路;既然不一定是SELV电路,那就很难满足三类设备的定义。 |
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