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Joined: Apr 2002
Posts: 7,413 Likes: 9
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Harold:
Have you considered the morning dew??
John
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Joined: Jul 2004
Posts: 10,043 Likes: 37
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Maybe I just live in a swamp but I always suspect water first on a GFCI trip problem.
Greg Fretwell
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Joined: Dec 2001
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Apparently transients on the line side can cause GFIs to trip too, even European RCDs with much higher nominal fault currents. Older 100 and even 300 mA RCDs frequently trip in lightning storms. I'd assume that US GFIs with their much lower trip current are even more susceptible to such phenomena (not necessarily caused by lightning activity).
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Joined: Jul 2004
Posts: 10,043 Likes: 37
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I have not noticed GFCIs tripping here from lightning but I do have a bit of protection on my power.
Greg Fretwell
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Joined: Feb 2002
Posts: 2,233
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John,
I haven't thought about Morning Dew, but i do drink Mountain Dew on occasions. Actually, I went out there the other day and I wrapped each and every connection with zip lock bags and taped up the ends to keep moister out. The GFI's still trip. I will look into it this weekend. I also bought a bunch of new GFI recp. in case I have to replace. I am wondering if a GFI breaker inside would be better than 5 GFI recpt. out side.
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Joined: Feb 2002
Posts: 2,233
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Greg,
The last time I had a large lightning strike near me, it took out a large tree, several bulbs and dimmers in the house. I also have a small sub station out behind my property. I also have 8 acres of woods behind me and the sub station. Luckily, it didn't get hit when Sandy hit us.
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Joined: Jul 2004
Posts: 10,043 Likes: 37
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What kind of surge protection do you have?
Greg Fretwell
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Joined: Feb 2002
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Joined: Jul 2004
Posts: 10,043 Likes: 37
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I would get a panel protector at a minimum and take a very good look at your grounding system. Make sure everyone is using it. (telco, cable etc)
Greg Fretwell
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Joined: Jun 2002
Posts: 44
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Have voltage readings been made from G to N / L to N / L to G?
What happens if the GFI Receptacle is pulled out of the box and the ground wire is removed from the receptacle?
Since all of problem pedestals are fed off the same main it seems like the cause is most likely back at the main disconnect.
But then again is could be a mis-wiring at any of the pedestals.
Is the feed to all of the pedestals in conduit the full length? If it’s URD maybe one of the wires are damaged.
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Joined: December 2003
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