依然 发表于 2012-12-12 11:19 . W1 l4 H3 l$ M2 r3 J5 C9 a( W
SJT是hard usage ,SPT是No hard usage,SJT的绝缘皮要比SPT的厚。
依然 发表于 2012-12-12 17:24
参考UL62中的定义:7 {1 O$ Q. }* k! g6 P5 W+ E
Not-for-hard-usage cord – a cord intended for use with light equipment, classif ...
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