false positive result from your electricity tester

来源: xhjaer19721 2016-02-06 21:39:43 [] [旧帖] [给我悄悄话] 本文已被阅读: 次 (592 bytes)
回答: 请懂电的地主指教余生渐入佳境2016-02-06 17:24:53

Just my experience. I am not a licensed electrician.

You got false positive result from your electricity tester. Trust your meter.

When there are 2 black wires (hot wires) close to each other, if one is hot, and another is dead, the dead one still get "induced" by the hot wire and show positive by tester----false positive.  If you use meter to test, sometimes it shows 20-30 volts too, but not 110 volts. So you know it is dead wire but get "induced" by another hot wire nearby. It is much safer to trust your meter.

所有跟帖: 

靠谱!去厨房和去睡房的电线在某段是贴在一起的。用电笔时,相对于地产生感应电势,电笔闪。 -白镜天- 给 白镜天 发送悄悄话 白镜天 的博客首页 (0 bytes) () 02/07/2016 postreply 17:57:47

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