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Old 09-02-2008, 10:20 AM   #1
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1988 34.5' Airstream 345
White Lake , Michigan
Join Date: Mar 2006
Posts: 95
Electrical grounding problem with AC hook up

I recently realized that both my coach batteries on my 345 MH were completely dead. I had the rig plug in for more than a month prior to knowing this. After replacing the batteries, I realized that much of the wiring showed severe signs of corrosion. I have cleaned and replaced many of the main wires and connections. While doing this I realized the 80 amp fuse for the coach batteries was blown, it has been replaced also. Somewhere in all this I began to realize that the entire rig was giving off a strong shock ... particularly on or near the frame. Does anyone have an idea why this may be occuring. It does not occur while using my generator? Mr. D.

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Old 09-02-2008, 10:48 AM   #2
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2011 34' Classic
Westchester Cty.NY , / Miami FL
Join Date: Jul 2007
Posts: 3,122
you might have what is known as a "hot skin".

you can start by reading this thread.

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Old 09-02-2008, 12:01 PM   #3
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1991 34' Excella
Princeton , New Jersey
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First I am assuming you only get a shock while the trailer is plugged into a Shore Line as DC will not give a shock.

My first thought would be to check to make sure you have a ground in your AC supply from the house. Take a voltmeter and read voltage from the hot leg to ground. If you do not get a voltage there you have an open ground in your house circuit. If the ground is good inspect the Shore Line where it goes into and through the coach for ware in the cord to the hot leg of your AC power cord that could be shorting to the chassis. Do this visually all the way to the AC panel if possible or with an OHM meter, and all AC circuit breakers in the coach turned OFF, look for continuity from the hot leg of the AC line to the coach chassis. You should not see continuity from the hot leg to ground. Lets define the short and reduce the risk before we look for the reason the batteries went dead
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Old 09-02-2008, 04:20 PM   #4
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1986 31' Sovereign
Kent , Ohio
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Howie Good Info! I had the same thing happen. Its a shocker, mine was a bad extension cord.
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