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Old 06-25-2019, 01:53 PM   #1
1 Rivet Member
1977 27' Overlander
2008 25' Classic
Join Date: Aug 2018
Posts: 7
Hot Shell Condition

I have what I believe to be a "hot shell" condition on my 27' 1977 Overlander.

While working on the steps today, I was sitting on the ground outside the trailer. I reached into the trailer to grab a tool and when I touched the door frame got a shock. The trailer is plugged into an extension cord and not really using any 120 V appliances.

The multimeter shows 50 VAC between the door frame (and any other point on the outer shell) and earth.

I checked the breaker box and was unable to locate any loose connectors or wires. I checked the shore plug for any loose connections and it was good.

Even with all breakers off, I still get 15 VAC from shell to ground.

I checked the outside outlets and did not really see anything, but the box under the cover is riveted on. No shorts between receptacle connectors and ground.

I tried unplugging the univolt, but it did not make any difference.

I am thinking I may have a neutral wire somewhere with some damaged insulation.

Here is the strange part. I checked the leaking voltage with different breaker box conditions and got different readings.

All breakers off: 15 VAC
Main only on: 15 VAC
Main and "lighting" breaker on: 42.5 VAC
Main and top left: 23 VAC
Main and top right: 16.3 VAC
Main and top two: 24 VAC
All breakers on: 50.5 VAC

Any suggestions?

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Old 06-25-2019, 03:05 PM   #2
Rivet Master
2014 20' Flying Cloud
Long Island , New York
Join Date: Jun 2015
Posts: 11,371
Glad you are OK! Some experts will chime in, but in the meantime here are some "hot shell" search results, showing other mentions throughout the AF site -- FYI:

Good luck,



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Old 06-25-2019, 05:44 PM   #3
1 Rivet Member
1977 27' Overlander
2008 25' Classic
Join Date: Aug 2018
Posts: 7
Good News/Bad News

Well, thanks for the reply.

I decided to go to Harbor Freight and get a $6 polarity tester.

Turns out several outlets in my garage have an open ground.
Plugged my extension cord into a known good outlet and no voltage issues.

Lesson learned. Never assume your source is good!

Now, off to fix the garage outlets!
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Old 06-25-2019, 05:48 PM   #4
Slide Out Society #001
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2007 30' Classic S/O
Somewhere , South Carolina
Join Date: Apr 2010
Posts: 3,112
For your info:

S/OS #001
2005 Dodge Ram 2500 5.9L 6 Speed
16" Michelins, Hi Spec Wheels, Max Brake, Carslile Actuator, Equal-i-zer, Dill TPMS. Campfire cook.
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