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Old 06-21-2015, 08:28 AM   #1
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DC Short? Odd Tingling on Door Frame

Greetings!

A very rainy night and damp morning here in PA, was climbing into my 2005 International in bare feet and noticed a slight tingling when grabbing the door frame. Unplugged the trailer from the pole, still there, tried testing it with my multimeter, black tip in the wet earth and then when touching red to parts of the frame, showing 0.48 set to 20V.

Any tips on what's going on? Would a DC short somewhere cause tingling when in bare feet? Is this a function of dampness or is there a serious issue?

Thanks,

Jim
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Old 06-21-2015, 09:01 AM   #2
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0.48, less than 1/2 volt will not cause tingling. Could there be any other source, maybe a capacitor?
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Old 06-21-2015, 09:03 AM   #3
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I was plugged into a 20a outlet using an extension cord while visiting a friend a few years ago. When reaching into my rear storage compartment I felt a slight tingle in my forearms when in contact with the compartment door frame. Never felt it before or since. I keep it plugged in using an extension cord and a dogbone 20a adapter while parked at my son's house. I suspect 2 possibilties here. Either a bad extension cord at my friends house or his outlet may have been wired incorrectly. Havent't been back to try and duplicate or use a different extension.
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Old 06-21-2015, 09:26 AM   #4
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DC is not known for causing tingling.

Do you have an inverter or any solar on the trailer.

Something is generating an AC signal
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Old 06-21-2015, 09:54 AM   #5
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Sounds a bit nutty but are you near a radar installation? Are you near a transmitting tower(TV) or a cell tower? You can tell if it is radar by hooking an analog meter to the skin and to ground. The needle will sweep up when the radar comes around. Please don't laugh! I have seen it. Could you be near a high voltage power line? You can pick up things like you have by inductance. That is loosely defined as two conductors close by, the voltage transferring from the active conductor to the neutral conductor (like the skin of your trailer).
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Old 06-21-2015, 10:13 AM   #6
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Originally Posted by Airstream Dad View Post
Greetings!

A very rainy night and damp morning here in PA, was climbing into my 2005 International in bare feet and noticed a slight tingling when grabbing the door frame. Unplugged the trailer from the pole, still there, tried testing it with my multimeter, black tip in the wet earth and then when touching red to parts of the frame, showing 0.48 set to 20V.

Any tips on what's going on? Would a DC short somewhere cause tingling when in bare feet? Is this a function of dampness or is there a serious issue?

Thanks,

Jim
Was there any lightning present in the area? If so, you may have experienced a streamer coming from the ground, trying to connect to a bolt in the sky.


A picture of two brothers with their hair standing on end taken in 1975 shows what can happen just moments before lightning strikes.
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Old 06-21-2015, 10:13 AM   #7
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DC is not known for causing tingling.

Do you have an inverter or any solar on the trailer.

Something is generating an AC signal
Try a 9v dc battery on the tongue
Sweat or high humidity and your hand touching 12v positive lead tingles.
No ac anywhere near the car when I experienced it.
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Old 06-21-2015, 11:56 AM   #8
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Static electricity. You're picking up charged particles from someplace.

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Old 06-21-2015, 02:32 PM   #9
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When winterizing my Stream, laying on the ground to open the water drains, I always get that tingling. I am usually plugged in to 15 amp service using a good extension cord and adaptor. I know I have a problem but can't find it.
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Old 06-21-2015, 03:10 PM   #10
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When winterizing my Stream, laying on the ground to open the water drains, I always get that tingling. I am usually plugged in to 15 amp service using a good extension cord and adaptor. I know I have a problem but can't find it.
Yours sounds like a floating ground. Get a 3 prong receptacle tester and check the source. I am assuming that the circuit is 3 prong.
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Old 06-21-2015, 03:31 PM   #11
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DC Short? Odd Tingling on Door Frame

Worth watching.
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Old 06-21-2015, 04:54 PM   #12
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Worth watching.
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Old 06-21-2015, 05:02 PM   #13
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When winterizing my Stream, laying on the ground to open the water drains, I always get that tingling. I am usually plugged in to 15 amp service using a good extension cord and adaptor. I know I have a problem but can't find it.
Hi Mac,

Not to be an alarmist, but what you are describing is potentially deadly.

Watch the video for further explanation.

You really should correct the problem before using the trailer again (at least before using it with shore power connected).

Many people are tempted to think, "Well, it's just a little tingle...". The thing is, you or someone else may be better grounded (a more 'attractive' path to ground) next time, and/or what may be a slight fault now might very well get worse.
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Old 06-21-2015, 05:05 PM   #14
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Greetings!

A very rainy night and damp morning here in PA, was climbing into my 2005 International in bare feet and noticed a slight tingling when grabbing the door frame. Unplugged the trailer from the pole, still there, tried testing it with my multimeter, black tip in the wet earth and then when touching red to parts of the frame, showing 0.48 set to 20V.

Any tips on what's going on? Would a DC short somewhere cause tingling when in bare feet? Is this a function of dampness or is there a serious issue?

Thanks,

Jim
Hi Jim,

I have to admit, your experience has me stumped.

I have the same question as HowieE -- do you have an inverter?
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