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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 * p1 \$ x* A; x$ Q
: C+ l# }) B# g! G! lCommon mistake Question:9 M# ]) T3 b. M$ C) X/ ~3 [& L% B
0 w; V3 K9 A, V* A# c& iWhat 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.( @. h' `( U& O; ]" s
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发表于 2010-5-22 05:23
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