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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 6 O; B2 }' M0 w3 }3 {* Z" q0 ~
* v3 D5 ^- u0 V: H% w, o+ `1 bCommon mistake Question:
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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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Please read Choices:* Z6 x8 ~! l( E0 W( s
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发表于 2010-5-22 05:23
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