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参考 NFPA 70 National Electrical Code® 3 Z: `6 h1 y) |' U- ]
! {: B' _4 W3 p L, t) A1 m725.2 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/ u3 h. Z- {) |) D( t
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0 \+ t" c C' P9 `2.3 CLASS 2 – A source having limited voltage and energy capacity. Requirements for voltage and
& y9 _5 @4 o5 ?% r9 h( Wenergy 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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