Hot ground wires

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Old 10-02-17, 07:08 PM
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Exclamation Hot ground wires

I was working on a 1950's house today to install a new bathroom fan. I took down the old one which was a heater/fan/light. There was two Romax wires going into the old fan. The grounds of the wires were not used for the old fan. They were cut back to the edge of the Romax sleeve. I tested the grounds and noticed that they were hot. Should I be concerned? I have worked on other 50's houses and there has not been a ground wire used in the electrical system. Did they wire houses differently during these times? My real question is what should I do when I install a new fan/light? I am concerned about the hot ground wires. Should I cut them back to the Romax like it was wired on the original fan/heater/light?
 
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Old 10-02-17, 07:26 PM
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If you determined the grounds are hot (voltage present) using a non-contact voltage tester, then that is not a reliable test. Non contact testers are only good for a quick "is there maybe a hot wire in this group" type test. You can not reliably test one wire in a group. You need a real volt meter ($12) or a neon tester for that.
 
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Old 10-02-17, 08:03 PM
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Hot ground wires

I will use my volt meter to doublecheck., thanks
 
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Old 10-02-17, 08:19 PM
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You should look to upgrading the wiring.
I'm concerned when there is a ground wire present but it's cut off.
 
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