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Old 10-24-2012, 08:20 PM   #1
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Reading 75 volts hot to ground with switch off


Title says it all. It's a ceiling light fixture. Any ideas?

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Old 10-24-2012, 08:22 PM   #2
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Reading 75 volts hot to ground with switch off


What were you doing that caused you to find this out?

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Old 10-24-2012, 08:26 PM   #3
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Reading 75 volts hot to ground with switch off


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Originally Posted by joecaption View Post
What were you doing that caused you to find this out?
Replacing a light fixture, I put my cheapy greenlee voltage detector up to it and it beeped with the switch off so I pulled out my multimeter and read that.
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Old 10-24-2012, 08:28 PM   #4
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Reading 75 volts hot to ground with switch off


How many wires coming into the box?
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Old 10-24-2012, 08:29 PM   #5
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Reading 75 volts hot to ground with switch off


3, hot, neutral, ground.


Edit: 1 piece of NMC in case you thought I meant otherwise.

Last edited by SubSailor; 10-24-2012 at 08:31 PM.
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Old 10-24-2012, 09:04 PM   #6
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Reading 75 volts hot to ground with switch off


How many BULBS were in that fixture when you took that reading?

Install some bulbs in there, and read your voltage again. Betcha you get a reading of -0-
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Old 10-24-2012, 09:11 PM   #7
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Reading 75 volts hot to ground with switch off


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How many BULBS were in that fixture when you took that reading?

Install some bulbs in there, and read your voltage again. Betcha you get a reading of -0-
I had the fixture removed, I just installed the new fixture, lemme check.
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Old 10-24-2012, 09:17 PM   #8
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Reading 75 volts hot to ground with switch off


KbSparky, I just checked it at the switch, it read 14 volts, but this is a lighted switch so maybe that has something to do with it not reading 0?
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Old 10-24-2012, 10:09 PM   #9
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Reading 75 volts hot to ground with switch off


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KbSparky, I just checked it at the switch, it read 14 volts, but this is a lighted switch so maybe that has something to do with it not reading 0?
That's why. The lighted switch relies on leakage of a small current (a couple milliamps) through the switch when it's off to power the light in the switch. So it's never really truly "off".

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