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参考UL62中的定义:
- C% Z4 ~+ I* y, A0 e$ qNot-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade
$ q7 p( m) ]) t, qin mechanical serviceability./ Y& M+ V+ c4 e% I* a! y7 v b
Hard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held
I2 ^# `- _. D8 O' ]appliances and tools, classified as the medium grade in mechanical serviceability.
/ W' q3 f& \1 C2 |5 s- x7 F: S0 B( `Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances0 ~4 v9 K: c6 U# j! o9 J
and tools, classified as the highest grade in mechanical serviceability. |
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