本帖最后由 移民电工 于 2010-5-22 07:20 编辑 2 a i9 k' e( t/ K3 o
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Common mistake Question: 4 w; t; F. x' `8 N ; |6 j0 |% ~' ~% p4 i7 g' {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. 0 j% i n2 p/ C0 e$ C3 ~ ; y* A! U) @% _5 w5 z: hPlease read Choices:7 b. l, F Z1 }4 t8 I! O/ T& B
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发表于 2010-5-22 05:23
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