本帖最后由 移民电工 于 2010-5-22 07:20 编辑 3 S( q6 ~5 ?6 |# q7 j: M5 k6 F5 t
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Common mistake Question:# L8 I: z: b$ m8 O1 o$ O! J8 ]) u" M
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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.3 Q7 i1 x$ `" @5 F% @
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Please read Choices:* d' w& p" b" c. h' v$ N& Q8 g, h
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发表于 2010-5-22 05:23
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