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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 " ~* d, E5 ~7 E; J0 G1 {' u5 p* Y
" I3 K7 y' R K. j! k& l( ZCommon mistake Question:5 s5 n4 m2 W! R, R: @. ?
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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.5 d/ s ~+ B& E" C6 r: ?
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Please read Choices:9 w9 a- K7 { G; E" K
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发表于 2010-5-22 05:23
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