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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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: X. C( O; ]/ jCommon mistake Question:
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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.9 ?* y% `. T4 T2 Z% p: e4 @5 s' a
7 _8 g. {% r( ~1 DPlease read Choices:0 j6 U2 @" d, q; P9 f$ M
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发表于 2010-5-22 05:23
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