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参考UL62中的定义:
; J: B+ W/ D; k6 f' F4 Q$ cNot-for-hard-usage cord – a cord intended for use with light equipment, classified as the lowest grade
) T3 b* r5 \9 ]) `in mechanical serviceability.
3 i2 I* z4 ?4 E z+ RHard-usage cord – a cord intended for use with moderately heavy equipment and for hand-held
! ]& n) x0 @1 l/ o9 Bappliances and tools, classified as the medium grade in mechanical serviceability.% L S* h# o, C8 _. Q, T& q* l
Extra-hard-usage cord – a cord intended for use with heavy equipment and for hand-held appliances3 l' C9 L1 Q' d" M8 ^7 N
and tools, classified as the highest grade in mechanical serviceability. |
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