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ROYBUCK's avatar
ROYBUCK
Explorer
Mar 17, 2015

A/C on 30 AMP Service

I have never tried the A/C on 30 AMP service. I will be in a camp ground in June with just 30 AMP. Can I run just one, I know I will need to cut back on other services, looking for recommendation from some one who has experience this. Thanks Roy

17 Replies

  • I have a 50 amp coach with an energy management system. It shows a list of the hierarchy of functions that it will shed if on 30 amp. As others said, move frig to manual mode and put it on LP. For the hot water heater, I only turn my on shortly before I need hot water. As mentioned, I would use the LP instead of the 120.
  • Yes, measure voltage inside the RV with the AC running as many 30A receps are worn out as they tend to be used at near capacity.

    I can run both AC's on 30A but I have EMS that manages compressor and fan startups.
  • aslakson wrote:
    Make sure your 30 to 50 dogbone passes power to BOTH legs of your 50amp feed - many coaches have one AC unit on one leg, and the other on the other. You need to make sure both legs are getting power. I'd test it before you get there to make sure.

    al


    I have never seen or heard of a 30 male to 50 female that did not connect the single hot on the 30 amp end to BOTH hots on the 50 amp end.

    So that will not be a problem. As all have said, you will need to manage your electrical use, but the one roof A/C will be fine.

    The only exception is that in some parks with only 30 amp service, the wiring is substandard, so be sure to check voltage (any outlet in the coach will do) when you turn large loads. 108 VAC is absolutely as low as you want to run your A/C.
  • refer on gas. water heater on gas. you will be fine with careful use of the microwave. at times I have needed to turn off the A/C to run the microwave. no biggie. you will learn what you can run all at the same time.
  • Make sure your 30 to 50 dogbone passes power to BOTH legs of your 50amp feed - many coaches have one AC unit on one leg, and the other on the other. You need to make sure both legs are getting power. I'd test it before you get there to make sure.

    And if you're lucky enough to have an energy management system that keeps track of your current draw, set it to 30 amps and it'll shed load as necessary to keep you under 30amps. On our coach (although it's a 30amp coach) the rear air automatically shuts off when the microwave goes on, and then comes back on when the microwave's been off for 30 seconds. Wouldn't have a coach without it.

    al
  • You may have to be careful using the microwave also. You just have to manage your power usage and everything will be fine. Check that your battery charger on your inverter is turned off since it can also draw a lot of current.
  • Sure, set the refer to gas only, lock out the electric element on the water heater and youll be fine.