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trtog7's avatar
trtog7
Explorer
Oct 28, 2013

Electric Water heater

New RV has Electric Water Heater Manual says over 30 amps Can it not be used on 30 Amps.

18 Replies

  • DryCamper11 wrote:
    downtheroad wrote:
    Not sure about the, "Over 30 amps."???
    But, yes you can most certainly use your WH on a 30a hookup.

    Why would you say that? If the manual says it takes over 30A, I'd expect it to take over 30A and eventually blow a 30A breaker.

    Because it's true.
  • smkettner wrote:
    AFAIK all are 1400w and will run fine on 20a 120v.
    Unless it is a marine version made for 240 volts?

    Even the Atwood marine version I saw that ran on 240VAC was only 1500 watts. When I first saw this post, I thought it must be a residential WH installed in some giant bus conversion - electric only - or perhaps an instantaneous residential unit. If it's Atwood and intended for a typical 120VAC/propane RV installation, I can't see how it could need more than 1400 watts.
  • trtog7 wrote:
    It is an Atwood and no idea of model number as we do not have unit yet and paperwork does not give number Why would they save more than 30 instead of 50 amps

    The common Atwood RV type WH is 1400 or 1500 watts. That's less than 15 amps. I would be very surprised if your WH actually requires more than 30A. That's 3600 watts.

    It's not impossible - a home WH of 80 gallons might be 4500 watts, but that's eight times bigger than a large 10 gallon RV type WH, and 13 times bigger than the common 6 gallon unit.

    I'd double check your WH manual, and if the manual says that it can't run on a 30A circuit, then call Atwood once you have the model number, so you can verify.
  • AFAIK all are 1400w and will run fine on 20a 120v.
    Unless it is a marine version made for 240 volts?
  • It is an Atwood and no idea of model number as we do not have unit yet and paperwork does not give number Why would they save more than 30 instead of 50 amps
  • downtheroad wrote:
    Not sure about the, "Over 30 amps."???
    But, yes you can most certainly use your WH on a 30a hookup.

    Why would you say that? If the manual says it takes over 30A, I'd expect it to take over 30A and eventually blow a 30A breaker. I'd also like to know what make/model this WH is.
  • Not sure about the, "Over 30 amps."???
    But, yes you can most certainly use your WH on a 30a hookup.