本帖最后由 移民电工 于 2010-5-22 07:20 编辑 5 ?3 c* ]% v9 j4 [* A1 w% c6 Y# m
Common mistake Question: / o3 j* n" V& [: M) _$ e + U" _' F: ]( R+ Y7 S+ S: s0 x9 w9 s% bWhat 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.1 D. @. t6 W) k" C. L
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Please read Choices: O" P3 K+ c; ` ( ~' V g/ B, X& }http://www.ceac.ca/bbs/forum-10-1.html