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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 " B s! l. |; n. O) `: j
* B% o" C5 C+ q" NCommon mistake Question:. Z" i% [6 P9 k5 a3 d
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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.
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1 x8 ?5 a: p, { |& E4 c. DPlease read Choices:; i5 E/ C! S$ F! [
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发表于 2010-5-22 05:23
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