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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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7 G0 O( l4 u& n. b9 h; t" gCommon mistake Question:+ y' f8 Y8 l% I ?. J
, k/ e) }2 a2 D9 gWhat 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.7 f S( E- y. B
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Please read Choices:& y. E' `5 w' h! S6 Z; C7 R
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发表于 2010-5-22 05:23
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