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本帖最后由 移民电工 于 2010-5-22 07:20 编辑
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Common mistake Question:/ }. A: G6 {/ }1 S5 ]3 H5 N9 |
* b& X' P( P) XWhat 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./ o1 l" t3 t, ~7 a6 ]$ }" g
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Please read Choices:& P& m6 M8 \ }3 P* L( w1 q1 [5 M
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发表于 2010-5-22 05:23
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