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Old 05-12-2014, 10:37 AM   #1
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I'm Shocked

We ended up purchasing the 314BHS that I talked about in my "AM I CRAZY" thread, against some of the advice given there.
We picked it up on Saturday and spent a good part of the weekend cleaning it and transfering things from the 242FK.
I ended up liking the leveler jacks on the 242 better than the ones on the 314 so I switched them. What I found is that whenever I touch the frame of the camper while it is plugged in, I get a jolt which I think is 110V (only if Im not insulated ie not wearing shoes or have skin touching the ground). The 2 copper wires that attach to the frame look a little rough and the connector they use does appear to be rusted. Do you think this is why I am getting shocked, or is there something Im missing. Thanks! Dave
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Old 05-12-2014, 10:48 AM   #2
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That's where I would start, insure that the frame-grounding wires are getting a solid/clean contact.

The next area I would check is your shore power cord for any compromises (burnt connector, damaged cord, etc.), and also check for any loose connections where it is landed in the TT at a junction box, and/or back of the breaker/fuse box.

Make sure your shore connection is "un-plugged" during your inspections.

Let us know what you find.

Bob
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Old 05-12-2014, 10:53 AM   #3
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First I would check that your ground is good on the cord coming from the house and also that the outlet has a good ground. When I experienced a hot skin it was from a faulty ground.
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Old 05-12-2014, 11:11 AM   #4
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ALso check that ALL THREE CONDUCTORs are connected on your shore power cable adapter if you are using one. Also your 120VAC garage receptacle must also have all three wires working.

The only way the trailer frame gets earth ground is through the shore power connection to your garage.

This could be serious on some people getting shocked so should be taken care of right away. Using those three light circuit testers from LOWES could come real handy...



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Old 05-12-2014, 12:26 PM   #5
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I would have never thought about checking the garage plug. Although it is a 3 prong plog, I don't know if it is truely grounded.... The house was built in 1955 and most of the plugs in the main house are two prong, however a breeze way/additional living space was put on between the house and garage at somepoint after the completion of the house and who knows if they ever really ran the gound on those outlets, since the breaker box is on the other side of the house.
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Old 05-12-2014, 12:53 PM   #6
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I STRONGLY recommend that you check the garage power. RoyBraddy's suggestion to use the continuity/polarity tester is a great suggestion. Next, I would put the tester in an outlet on the trailer. If all checks out with a tester like that, I would put a cord-mounted GFCI in to the circuit. I'll bet you a box of donuts it will trip. I think you have a ground fault in either the garage or trailer wiring. I suspect that there may be a high resistance connection in the return loop somewhere that is sending the current through any available ground connection (like you!). When you are doing any checks act as if you know the current will travel through your body to the ground unless you take positive steps to stop it.

Good luck - and be careful!
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Old 05-12-2014, 03:26 PM   #7
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If the shore power outlet checks out ok with an outlet circuit tester, try this….

First I would check to see what the actual shocking voltage is with a multimeter. USE the meter to check the frame to a known ground from the shore power source. I would not recommend touching anything to see if you get a shock.

I addition to the previous suggestions, I would check ALL the TT's outlets with the circuit tester, as one of the outlets may have been wired incorrectly.

Next turn off ALL the AC breakers inside the trailer. Then check if the shocking voltage is still there. If not, your issue is after the TT's main breaker. If you do get a shock (with all the breakers turned off) it is between the main power panel and the shore power connection.

If you did not get a shock, switch on only the main breaker (with the others in the off position), now check for any shocking voltage.

If you did not get any shocking voltage, switch on one of the other breakers (with the main breaker) and do another shocking test.

If you do not get a shock, continue with the remainder of the breakers one at a time and checking for shocking voltage after turning on each breaker.

When you determine which breaker is creating the shocking voltage you can look at the TT's wiring diagram for the TT's electrical panel and isolate where the problem is.


PLEASE BE CAREFUL!!! We want to hear form you again... like I said use a meter to check for the shocking voltage not a wet finger...

Don
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Old 05-12-2014, 07:36 PM   #8
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Whatever you do - be careful. It doesn't take much current to stop the heart. If you are not experienced in electrical troubleshooting please seek help of an experienced person. If you have a ground fault the required current could easily pass through you! Don't ever put your body in a circuit in a manner that could allow it to become a conductor to ground or neutral. If you are using a multi-meter, for example, connect the ground (black) probe to the trailer frame without touching anything else. Then without touching anything on the trailer, use the current/voltage probe (red) to touch the circuit. I've seen an electrician badly injured when he put himself in the circuit by touching a metal ladder while checking voltages.

Mustang65 suggestions are great - if you have a known good ground and you practice safe electrical troubleshooting.

Unsafe electrical troubleshooting is like looking for a propane leak with a match. You might get away with it but...
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Old 05-12-2014, 08:21 PM   #9
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One last thing.... while you have this shocking issue, I would not keep the TT plugged in to shore power, or let anyone get in contact with it... until you get the issue corrected. Especially if any kids are around it...
Just my thoughts,

Don
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Old 05-13-2014, 12:47 AM   #10
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I got a nasty shock when I was working on my old (1969 Terry) TT and discovered that the hot and neutral were swapped and the ground was open. Unfortunately for me I discovered by getting shocked. I didn't get hurt but immediately set out to find the cause of the problem.
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