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参考UL62中的定义:
9 z8 @: Q3 j2 b% N( c4 Y6 JNot-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade
1 R$ H; ]6 A uin mechanical serviceability.: d) n6 ]: p+ I, N
Hard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held, Q0 w! G. `, J6 w. a
appliances and tools, classified as the medium grade in mechanical serviceability.
' w3 l) b3 z7 D0 m! |) K" M2 cExtra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances D0 _) H T5 l- t* z7 Y
and tools, classified as the highest grade in mechanical serviceability. |
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