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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 ; E. J" E9 n: p% e6 L; H5 i* C. p
, ?1 c4 C) r9 [8 h2 R/ e$ W; @Common mistake Question:
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- L- I! g1 i J$ `( n# yWhat 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.
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1 f/ t: y, |# HPlease read Choices:6 e7 V0 b$ T6 w
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http://www.ceac.ca/bbs/forum-10-1.html |
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发表于 2010-5-22 05:23
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