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taigarazz's avatar
taigarazz
Explorer
Aug 06, 2013

How to use volt meter

So I am a bit electrically challenged. Whenever I start reading about RV electric systems, I just start nodding off. Not good, and I am trying to educate myself.

But I feel a more urgent need to understand how to use a simple volt meter to check the electric at my campsite hook up, before I plug in and fry something. So far I have been lucky, but I don't want to depend on luck for the long haul.

Thanks
  • Go to this site and click on "outlet testing".
    I built one of the testers shown in the "50 amp outlet tester" link. Just plug in and test the park power without having to use a multimeter at all. I can use a 50/30 adapter to test a 30 amp outlet with it.
  • Please be very careful when checking voltages. Be sure your meter is on the correct setting before sticking the probes in. Many a meter has been lost by incorrect settings. If you're lucky, you will just blow the meter's fuse worse case, it's new meter time.
  • I would suggest using one of these:
    120 volt meter
    Plug it into a standard RV reverse adpater. This would then plug directly into the campground facility's pedestal. Gives voltage and whether it is wired correctly.
    You can then plug it into an unused receptacle inside the rig to moniotr voltage levels.
  • taigarazz wrote:
    Yeah, that tutorial does explain how to use a meter, but i still dont understand about where I insert the leads into the 30A or 50A outlet on the pol and what exactly I'm looking for, or trying to avoid.

    Please don't think I'm ungrateful for the link, I'm just too dumb to understand how to apply in to the situation

    Linda


    guidance for how a 30amp RV outlet should be wired..

    http://www.noshockzone.org/accidentally-plugging-into-240-volt-outlet/

    So if you put your multi meter on AC volts, you should be 120V across the hot to neutral

    this thread has a diagram of a 50 and 30 off the same panel like you will find at many parks.

    http://weldingweb.com/showthread.php?t=112681

    In a 50 amp you are looking for 120volts when you go from either hot to neutral, also on AC volts..

    If you happened to go hot to hot you would get 220 volts, but the RV electrical system uses it as two 120volt legs
  • Good question. Being just a bit electrically challenged myself, I can't wait to hear the correct answers.

    My solution so far was to buy a surge protector. I wish I had waited a year because right after I got mine they started building a volt meter into the unit. That way if you get interrupted for voltage irregularities you know whether it was for too high or too low of voltage.

    And I use a volt meter in the wall outlets to see if the voltage in the trailer jibes with what I assume I am getting at the pedestal.

    After that, I don't know diddly. I never have checked the voltage at the pedestal.
  • Yeah, that tutorial does explain how to use a meter, but i still dont understand about where I insert the leads into the 30A or 50A outlet on the pol and what exactly I'm looking for, or trying to avoid.

    Please don't think I'm ungrateful for the link, I'm just too dumb to understand how to apply in to the situation

    Linda

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