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本帖最后由 移民电工 于 2010-5-22 07:20 编辑
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; ~# F' Z% H; r7 |0 P2 D( mCommon mistake Question: p# G- C& U7 A- D0 p0 j* A; X- W
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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.
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* k/ M) o, m5 bPlease read Choices:( I7 w' @1 W& w! F* z3 G
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发表于 2010-5-22 05:23
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