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加湿机UL998标准中,42.11章与42.12章,
4 n8 E, Q8 u2 k42.11 For an extra-low-voltage safety circuit, if operation of the product with a short circuit or grounded
8 x6 T+ V) y$ [- ?& `; w3 |* ~ circuit may result in unsafe operation of the controlled device, spacings shall be not less than as specified) V+ K2 x* {6 q2 G8 h
in Table 13.. K3 m0 ^, q5 ~6 Q; x
42.12 For extra-low-voltage nonsafety circuits, spacings are not specified.
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( L# F3 H* ]5 T# M) `( q4 X* C$ {6 h其中的extra-low-voltage safety circuit与extra-low-voltage nonsafety circuits怎么理解??谢谢
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