Voltage through ground.

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November 20, 2009, 06:19:47 PM

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	Author	Topic: Voltage through ground. (Read 1950 times)
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magician59

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Voltage through ground.

« on: August 09, 2009, 08:36:41 PM »

While replacing a ceiling fan in my home (built cir.1982), I noticed a voltage in my ground at the original connection. This was among other issues that evidence sub-standard construction. I turned off the house main and still read about 81VAC on the ground. How do I proceed to remedy this?


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Repair-man

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Re: Voltage through ground.

« Reply #1 on: August 09, 2009, 08:51:25 PM »

This is bleed voltage coming from an un-grounded circuit somewhere in the panel. If the breaker box was grounded to a proper copper rod, this would not occur unless a circuit was improperly grounded feeding off of it. If you have underground utilities, then you may need professional help here.


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magician59

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Re: Voltage through ground.

« Reply #2 on: August 09, 2009, 09:05:13 PM »

Thanks for the prompt reply. Another question: If this is caused by a current bleed, why didn't my main breaker stop it? Shouldn't the main disconnect from the utility source?


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Repair-man

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Re: Voltage through ground.

« Reply #3 on: August 10, 2009, 04:51:52 AM »

Quote from: magician59 on August 09, 2009, 09:05:13 PM

Another question: If this is caused by a current bleed, why didn't my main breaker stop it? Shouldn't the main disconnect from the utility source?

Because the main breaker is connected to L1 and L2, not Neutral.

Breakers are there to prevent overload. (Except for GFCI's)


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shieldcracker

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Re: Voltage through ground.

« Reply #4 on: September 28, 2009, 05:16:06 PM »

Repair man, magician said he shut off the house mains.
If he still has voltage readings with the mains off then his problem might be more serious.
Magician I have an idea of what could be happenin but I need to know exactly how you came up with the 81V?


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Repair-man

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Re: Voltage through ground.

« Reply #5 on: September 28, 2009, 05:25:04 PM »

This is an old post...why are you trying to revive it? He apparently found the problem and failed to report back, as is often the case.


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shieldcracker

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Re: Voltage through ground.

« Reply #6 on: September 28, 2009, 05:40:57 PM »

Because the problem could be very serious indeed. Just think about what he said...

You wanna see old, go see your own reply to my question on the wax motor 8 months after it was posted! Cool