本帖最后由 移民电工 于 2010-5-22 07:20 编辑 9 K B. z% M3 I* q% u3 b- c" g ! L+ a! q2 z) V* Q) R7 ^Common mistake Question: " G1 _ G4 Q2 n: H: z2 F8 |) x5 c2 N- j; P/ [! K: J# \
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.) D5 |) P& X2 |1 p+ Q- U2 ~* \
5 h6 p' w/ E" L( H6 u8 tPlease read Choices:" X9 k p" K- n
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发表于 2010-5-22 05:23
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