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Old 08-04-2009, 12:38 PM   #1
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Alpine Owners Club
Join Date: Mar 2006
Location: Oregon
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GFI at storage lot

I posted this question on the SYS & TECH. forum but since it applies to the
Alpine I'll ask. Why would my 36', 05 cause a GFI to open when I plug in where the coach is stored? It is a 20 amp outlet. The owner of the lot says he has the same problem with his 50 amp. coach. I had the same problem at my house so I got rid of the GFI and used a standard 20 amp outlet.


05 Alpine 36MDDS, 09 Subaru Forester, no animals.
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Old 08-04-2009, 01:34 PM   #2
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Winnebago Owners Club
Spartan Chassis
Join Date: Aug 2002
Location: ...hopefully on the road!
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It's not an Alpine thing -- I believe it happens because you also have GFCI outlets inside the coach. When that has happened to me when plugging into a 15 or 20a outlet, I have been able to re-set the shore GFCI AFTER plugging in, and then things work fine.

Paul (KE5LXU) ...was fulltimin', now parttimin'
'03 Winnebago UA 40e / '05 Honda Odyssey toad
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Old 08-05-2009, 08:34 AM   #3
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I always thought it was the inverter/charger that caused this problem. I just rewired my home outlet to provide a 30A socket so no more problems like that for me!
John and Mary Knight
2015 Newmar Ventana 4311 - wheelchair accessible
2015 Cadillac SRX Luxury AWD
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Old 08-05-2009, 09:40 AM   #4
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Damon Owners Club
Workhorse Chassis Owner
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No the GFCI's inside the coach have nothing to do with the problem

There are 3 common problems with motor homes that trip GFCI breakers

SOME converters seem to play nasty with GFCI's. If you have one your only storage option is a 3rd party smart charger (or a Small Progressive Dynamics 9200 series) hooked in parallel and plug it in all by it's lonesome. (I really like PD 9200's by the way)

Many inverters have neutral and ground bonded.. NOW.. Some of the better ones such as My Prosine 2.0, will "Break" the bond when on shore power... Some won't.

Any bonding of netutral and ground post-GFCI trip the Click of Darkness.

Finally... In many cases there is a partial short in the water heater or fridge or some other system that basically goes un noticed by human hands....

But is enough to trip the GFCI
Home is where I park it!
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Old 08-06-2009, 12:01 AM   #5
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Location: Long Beach, CA
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You will also find your Surge Guard will read "open" when plugged into a GFIC 20 amp outlet.
2003 Alpine 40FDTS (400HP)
Long Beach, CA
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