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参考UL62中的定义:2 b% P3 X! y ]7 L6 ~$ n
Not-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade' y1 g8 L+ J$ E3 B9 f7 j2 [
in mechanical serviceability.
: L. N* Q$ N- Y/ E# B) `6 ~Hard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held
- N3 g6 }6 U/ c! r% \appliances and tools, classified as the medium grade in mechanical serviceability.5 a! S) R9 ?# v
Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances
- i1 C3 m7 o7 d4 f* M/ y5 iand tools, classified as the highest grade in mechanical serviceability. |
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