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Old 06-21-2017, 09:56 PM   #1
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I ran into something odd the other day. I was working on a circuit that had an old Hubble GFI in it and was getting some weird voltage readings. It turns out that the load terminals on the GFI had no ground reference whatsoever. On the face of the receptacle I had good 120 to ground, but nothing from the screw terminals. I'm​ curious if anyone has ever seen that before.
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Old 06-21-2017, 10:04 PM   #2
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Originally Posted by Forge Boyz View Post
I ran into something odd the other day. I was working on a circuit that had an old Hubble GFI in it and was getting some weird voltage readings. It turns out that the load terminals on the GFI had no ground reference whatsoever. On the face of the receptacle I had good 120 to ground, but nothing from the screw terminals. I'm​ curious if anyone has ever seen that before.
Please unscramble.

Thanks.
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Old 06-21-2017, 10:05 PM   #3
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I ran into something odd the other day. I was working on a circuit that had an old Hubble GFI in it and was getting some weird voltage readings. It turns out that the load terminals on the GFI had no ground reference whatsoever. On the face of the receptacle I had good 120 to ground, but nothing from the screw terminals. I'm​ curious if anyone has ever seen that before.
Sounds like the GFCI went bad.
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Old 06-21-2017, 10:07 PM   #4
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Sounds like the GFCI went bad.
It got replaced. I just found it an odd way to fail and was curious if anyone else had ever seen it.
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Old 06-22-2017, 01:13 AM   #5
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It got replaced. I just found it an odd way to fail and was curious if anyone else had ever seen it.
I've seen a couple that had an internal melt down.
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Old 06-22-2017, 08:36 AM   #6
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That's really weird. As far as I knew the loadside and the receptacle where the same conductors. They are both connected to the lineside via a relay that opens when the GFCI trips.

I don't see how the receptacle holes would actually read different than the loadside. I believe there should always be continuity between them.
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Old 06-22-2017, 09:06 PM   #7
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digital tester issues
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Old 06-23-2017, 06:38 AM   #8
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I don't think it was tester issues. What actually alerted me to it was that I was changing out a switch to a motion sensor and the sensor was acting goofy. When I replaced the GFI it worked just fine. I think I threw it away or I would crack it open to see what it looks like inside.
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