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[技术互助] Common mistake Question,现场图片一览

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发表于 2010-5-22 05:23 | 显示全部楼层 |阅读模式
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本帖最后由 移民电工 于 2010-5-22 07:20 编辑 3 n& Q( u; _, t6 W" ?) J9 m
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Common mistake Question:" y: K9 {" y2 T

& _4 N" }8 u1 _0 d) bWhat 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., R- D" d: ?7 ~3 I9 v
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Please read Choices:; X" h+ I/ v! a. u! T

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 楼主| 发表于 2010-5-22 06:20 | 显示全部楼层
现场图片一览
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 楼主| 发表于 2010-5-22 06:20 | 显示全部楼层
现场图片一览7 P; G5 d  v7 O) V& h2 S4 s, C

: p; l# r5 I& W加拿大华人电工论坛
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鲜花(2) 鸡蛋(0)
 楼主| 发表于 2010-5-22 06:21 | 显示全部楼层
老杨团队 追求完美
现场图片一览9 z' j4 Y0 u; i  z+ A6 M; e

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