在UL 8750里面有写" 8.7.1 A cord-connected unit rated for a nominal 250-V or less supply shall be tested in accordance with this section. Leakage current shall not be more than:
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a) 0.5 MIU for a two-wire cord- and plug-connected unit, pmyHto"
b) 0.5 MIU for a three-wire (including grounding conductor) cord-and plug-connected portable unit, and bz_Zk
c) 0.75 MIU for a three-wire (including grounding conductor) cord- and plug-connected stationary or fixed unit