Forum Discussion

isellsunshine's avatar
Oct 07, 2014

Brother in Law knows everything, now we have a problem

My husband and I stayed on his brothers 40 acre ranch this summer to get out of the Arizona heat. We live full time in a 2007 Bighorn 5th wheel.

From doing research on the web, I've always known RV power is a different than regular house power, but I don't quite have the language to describe the difference.

When we arrived in Minnesota and our BIL proceeded to get the wiring ready for us, I pleased with him to please be careful, I know RV power is a little different, it's more sensitive, etc.

He didn't listen, he's a contractor after all, and how hard could this be to hook up a little ole RV when you hook up entire houses?

He hooked us up and we immediately blew the following four things:

-Fireplace no longer works
-Microwave blew out
-In floor vacuum cleaner system no longer works
-Fridge will only work on propane now, whereas it would switch back and forth between the electric and propane before this.

We live in Arizona most of the year, so I can live with the Fireplace. We bought a new microwave for $99 at Lowe's, so all good there. I hated the in ground vacuum cleaner thingy, so no worries there.

The fridge only working on propane really bothers me though.

I estimate we spend an extra $40 a month on propane due to not being able to run the fridge on electric. That's almost $500 a year. If we stay in the RV 5 years, that's $2,500.

Everything else works just fine.
Outlets, etc, all work throughout the RV.

My husband is a master mechanic so he's very handy but he doesn't know/understand about electrical in an rv either.

I'm wondering if someone can point us in the right direction to help us troubleshoot this?

We are on our way back to Arizona and I'd like to get this fixed once and for all. (and send my BIL the bill) ;)

If I had to guess, some sort of master motherboard thingy burned out when he overshot the power. (see what I mean by I don't have the language for this?)

Really appreciate any/all help.

Susan & Dave,
Currently in Nebraska, headed to Arizona
  • most things
    blown when plugged into 220
    ac board
    fridge board
    converter
    tv's
    hotwater heater board
    microwave

    30amp is a single 110 volts leg
    50amp is 2 110 volt legs the trailer is just divided into 2 curcuits
  • ah, yes. here's the deal.

    This is almost certainly a simple case of the power being wired for 240 volts, instead of 120 volts, and the over voltage burned out lots of things. It is an easy mistake to make, especially if you don't pay attention to somebody trying to tell you things.

    You see, the plug on your RV, which is wired to a rig that HAS NOTHING IN IT THAT IS 240 volts, is the same plug used in residential construction to hook up things like electric clothes dryers and washing machines and such that are all 240 volts. This leads many folks to the problem you now describe.

    This is why I personally highly recommend everyone carry a cheap voltmeter with them if they own an RV. Plug that sucker into the power and verify you only get 120 volts before you plug in the rig. The $10-$20 you spend on the voltmeter will be recovered the very first time you save yourself from getting 240 volts. (And yes, you need to do that at campgrounds, too. You'd be surprised how often the electrician called in to fix something or install things at a campground will make that same mistake.)

    Now you are going to have to replace a bunch of things, and since you and your hubby are not competent electricians, I highly recommend you take your RV to a dealer and tell them what has happened. Be prepared to replace a LOT of things.