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参考 NFPA 70 National Electrical Code® 1 t# u; D7 A% T9 G1 H8 }
) \- Z( V8 f$ Y/ S. Q725.2 Definitions.( m- K6 O& k- Z, m6 j
2 l! r( S' Z- d" d- y; f) UClass 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.2 f% G$ I( J R, e0 b
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UL1310
3 O7 r6 K- R9 S. O Q2.3 CLASS 2 – A source having limited voltage and energy capacity. Requirements for voltage and& v, E9 `/ ~' _5 q4 A; i
energy capacity limitations are as indicated in this standard. See the Maximum Output Voltage Test, Section 28, and the Output Current and Power Test, Section 30. |
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