本帖最后由 移民电工 于 2010-5-22 07:20 编辑 + n) r% s. k8 w3 g; o5 B+ y$ o5 h" D% v
Common mistake Question: . b0 N' t, D8 l; {. [ 7 L# b4 w1 Z: pWhat 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.( n5 m( J5 X9 `