本帖最后由 移民电工 于 2010-5-22 07:20 编辑 ; j2 l: c( ~6 k D( ^: y, d
5 k1 ?4 Q; T+ ~7 yCommon mistake Question: # j* }) X1 D1 m) K& |: w" e. v 6 @9 w0 |5 Y5 s1 RWhat 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./ _8 O: H* H5 F* o& D( v% T9 h
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Please read Choices:" R1 @" x% w! o" T: o