本帖最后由 移民电工 于 2010-5-22 07:20 编辑 6 V5 w+ y, l T
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Common mistake Question: d1 F' Z3 L0 g7 v5 a5 S* y
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What would you do? Lets say you are adding a circuit into a sub-panel, and you see no ground bar. The grounds and neutrals of about twenty 12-2s go to the neutral bars and the box remains ungrounded. Your sub-feed is four wire(A,B,N,G) and the last forgetful sparky left that bar that can bond the box to the neutral bar. please vote. 1 k% d8 |4 \: F. U( D9 J1 H4 \/ q( a) t
Please read Choices:1 e0 M7 F5 v& s5 z3 m
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发表于 2010-5-22 05:23
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