Hot skin!! Please help!

Anything electric, AC or DC

Re: Hot skin!! Please help!

Postby Steve D » Fri Apr 14, 2017 7:00 pm

The leads from the meter are hooked up to the camper fender and a earth ground.

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Re: Hot skin!! Please help!

Postby jondbar628 » Fri Apr 14, 2017 9:22 pm

OK, you have a differential between the trailer ground and the earth ground. THis indicates a high-resistance between the two. The ONLY real ground you have is the ground wire in your extension cord to shore power. The trailer ground "floats" otherwise. (Unless you drive a good ground rod) Does your PD4045 have an indicator light when power is applied? this COULD be a source of the problem. almost all devices connect to common (ground) to complete the circuit.

To troubleshoot, disconnect shore power. Connect one end of a wire (long enough to reach the far end of the trailer) to the ground prong of the trailer connection, and the other end to a meter lead. Set the meter on x1 or x10 on the Ohms scale. Starting at the device nearest the trailer connection, read the resistance from the common (not the ground, although it should be the same) across the meter. anything less than an ohm is inconsequential. When you get a significant increase in resistance, you've found (at least one of ) your problem(s). If you don't find ANYTHING reading abnormally, the problem is in the shore-power cord ground..............This is my second post - the first was in more detail, but got timed out.
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Re: Hot skin!! Please help!

Postby low277 » Fri Apr 14, 2017 9:36 pm

It looks like your getting about 22 volts AC between the fender and earth? This is not normal! You defininetly have a problem. I would double check all of your AC grounding and bonding. If everything is grounded/bonded correctly the issue should be somewhat self diagonistic as a over current protection device will blow or trip.

Be safe, be careful and keep looking.
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Re: Hot skin!! Please help!

Postby Dale M. » Sat Apr 15, 2017 8:57 am

Steve D wrote:I'm beginning to think that this is just how it's supposed to be. I have all 12v circuits disconnected. I have all 120v disconnected. I have the battery disconnected.
The only things that are still hooked up are the 30a main and the 15a breaker that powers the pd4045. The voltage is still there. If I turn off the 15a that powers up the pd4045 the voltage goes away. I'll post pics of my voltage measuring technique.


IF the PD 4050 has it's OUTPUT BREAKERS OFF and unit is on and voltage is there ... The PD 4045 is source of the problem (voltage)...

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Re: Hot skin!! Please help!

Postby MtnDon » Sat Apr 15, 2017 9:11 am

Where was the PD unit bought? I recall something about there being some counterfeit PD's being sold at some places online. Could this be related? PDinfo
Our 6x12 deep vee nose cargo trailer camper conversion... viewtopic.php?f=42&t=58336

We have a small off grid cabin we built ourselves in the NM mountains; small PV solar system; 624 watts PV, Outback CC & inverter/charger ... http://countryplans.com/smf/index.php?topic=2335.0
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