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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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4 p1 w) F) Z/ pCommon mistake Question:6 {9 h" Q w+ x' W, O5 |# F
* w1 N3 K- s& y! c/ l3 y2 bWhat 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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, D8 @% V& L, }4 O" hPlease read Choices:6 A9 q+ Z: j1 q2 o6 ~/ P
1 }( R% H4 g F2 ~/ L1 H" _http://www.ceac.ca/bbs/forum-10-1.html |
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发表于 2010-5-22 05:23
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