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Electrical Discussion of preventative/corrective maintenance and other technical issues regarding your coach's electrical system.

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  #1  
Old 09-04-2019
djlcanuck djlcanuck is offline
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Unhappy ZAP)!!! ELectric shock

I have been working on my 96WB42 for 2 years and have always had her plugged in to 15A service at my house. I have crawled in and out and all around with no problems
Yesterday I was underneath changing the oil (putting the drain plug back in)
and she BIT me. I got a nasty jolt of 110. I crawled out and check all the regular culprits. Nothing wet, no missing grounds. I unplugged her and all was good. After plugging her back in where should I check for correct shore to ground connection? I get nothing when I check Voltage from frame to extension ground or actual earth ground.
Where do I start checking for missing grounds?

As a side note I have noticed a pulsating of the AMP and battery dash gauges
I assume that I have a bad or missing 12v ground as well. I have cleaned and tightened the house and engine battery grounds to frame and engine. Whats next?

Any electrifying ideas would be enlightening
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  #2  
Old 09-05-2019
marvjeanm380 marvjeanm380 is offline
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I would check your power receptacle, power cord and any adapters.
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  #3  
Old 09-05-2019
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Mikenjackie Mikenjackie is offline
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As Randy has said in the past "....50A to 30A to 15A; what could possibly go wrong?" Apart from the obvious overheating issues you might get at your 15A socket (have you checked the 30A to 15A connection to see how hot it is?), or even worse, extension cord, are you sure the ground is good on your 15A house circuit? Whatever else, you have to remember that your 50A cable is probably 2 or 4 AWG, and your 15A is 12 or 14 AWG, a big discrepancy. My buddy had a Class C, 30A, he had plugged into an extension cord, lost power one day, & found the extension cord socket melted!
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  #4  
Old 09-05-2019
badandy badandy is offline
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There is nothing wrong with running on a 15a circuit if you aren't running 15a worth of stuff.

Let's think about this logically. You were laying on the ground and touching the bus, right?
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Old 09-05-2019
oldmansax oldmansax is offline
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Like Badandy, I don't see the problem, electrically speaking, with running on a 15A circuit, as long as everything is wired properly and your are not using more than 15A. A 15A receptacle has a ground, a neutral, and one hot. A 50A receptacle has a ground, a neutral, and two hots. Ground to ground, neutral to neutral, two hots to one hot. Don't allow the bus to use over 15 Amps.


What is the problem?


TOM
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  #6  
Old 09-05-2019
Harold,Cat&Sam Harold,Cat&Sam is offline
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I would definitely start with checking the outlet first .

Do you have a Progressive Industries unit on your coach ?

I was shocked a few months ago at an rv fire scene . Went to unhook the batteries ground and got hit with 110 volts . Come to find out , there was a 110 volt line laying on top of the coach energizing the whole coach . Not cool.
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  #7  
Old 09-05-2019
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Crit Bliss Crit Bliss is online now
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Hot skin is a big problem, mouse chew through a ground?
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  #8  
Old 09-05-2019
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kunzelj kunzelj is offline
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I believe this could also be caused by induction since there are so many wires running through the coach and the skin is all steel. I was getting about 40V of power to the skin when I'm plugged in WITHOUT the third neutral prong on the power cord. I would check the third prong to ensure that power has some place to go instead of through your hand to ground.
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  #9  
Old 09-05-2019
djlcanuck djlcanuck is offline
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Quote:
Originally Posted by badandy View Post
There is nothing wrong with running on a 15a circuit if you aren't running 15a worth of stuff.

Let's think about this logically. You were laying on the ground and touching the bus, right?
That's exactly it.
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  #10  
Old 09-05-2019
Bikeboy57 Bikeboy57 is offline
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I am just dogpiling here. Start at the plug in, checking continuity from ground to neutral. Work your way through every connection checking ground to neutral continuity till you get to the Circuit breaker box. You should have continuity between ground and neutral up to the circuit breaker box. When you lose the continuity between ground and neutral, the ground is seeking a path to the ground. Laying on damp earth with full body contact, you became the ground path back to earth.

If that doesn’t find it. With the coach unplugged, turn off every circuit breaker. While checking continuity between neutral and the hot legs, turn on the breakers one by one. You should not have any continuity, but if you show any, you have found the circuit where you have a short.
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