本帖最后由 移民电工 于 2010-5-22 07:20 编辑 & _6 k0 Y9 E. v
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Common mistake Question: + A2 R3 a) M- }9 I1 H I 8 W: @- F$ I/ c4 CWhat 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.+ F+ ^ ~6 c3 v/ b
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发表于 2010-5-22 05:23
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