Roof top ac require 50 amps?

It's a shame that some people doing this don't have a clue. There probably won't be a problem if the batteries are charged and nothing else is running. I run my AC at home on 20 amp circuit and don't have a problem.

Well I would say that is likely incorrect. Does your 5er have an energy management system? How many AC units? What is the start-up amp draw of the AC(s)?

It is hard to fathom, but so many RV sales people and even worse, technicians are so ignorant about RVs and electricity.

It is possible to run ONE RV A/C on a 20 amp circuit, provided there is nothing else on the circuit and the A/C is the only thing on in the RV and the extension cord is not too long.

Ken

My 50 amp service 5er is currently plugged into my home 120v 30 amp rv receptacle / plug on a 30 amp breaker and I can run both ac's with no problem. Its over 90 degrees outside as I write this.

Also when camping in many state parks 30 amp is the highest amp power available and I run 1 ac with no problem & the hot water heater and microwave.

I have also run 1 ac on 20 amp service with no problems in the past.

The gentleman was uninformed. You can run your AC on a 30 amp power source. If you have two AC units you will want to only run one of them at a time unless you have a good power management system. I would avoid trying to plug into a 20 amp circuit, just to many "Maybe's".

50A 5th wheel with a 15K A/C Unit

I can operated it on:
50A power supply
30A power supply
20A power supply

ALL are 120V AC.......

Biggest issue is 'voltage' of power supply
108V and I shut down my A/C Unit cause I personally do not like to operate induction motor on less than 108V (if that low I run generator which is 30A)

Course there are limitations on each CB Amp Rating
50A.........pretty much can run everything in 5vr on 'electric'
30A.........might have to swap fridge/water heater over to propane
20A.........A/C Unit and converter. (Did that for over month one time)

Just make sure that the plug is 30 amp with 120 volts. Some dryer plugs run 220 volts and have a similar looking "30 amp" plug. Many people have fried their equipment plugging into that plug.

Old Bisquit above has all that you need to know.

Also former squid.

Appreciate answers, so next question is if i buy a new portable generator what should i look for. Unfortunately if I want water from my well on my boondock property in northern michigan I need 220v.

General rule, 20A no AC.
30 or 50A AC no problem IF!
People generally do not understand power managment. Have one fella in the park right not upset because he can't run his AC on 20A. If you install a hard start capacitor, switch refer and water heater to gas you might start a AC. Personally even on 30A I switch everything to gas before I try my air

RetiredSquid wrote:
Appreciate answers, so next question is if i buy a new portable generator what should i look for. Unfortunately if I want water from my well on my boondock property in northern michigan I need 220v.

There are charts available where generators are sold to size your generator to the total existing wattage you need to operate plus give you the additional temp startup wattage to get your appliances running
Very important that these charts are consulted

Is your well pump a submersible or above ground pump?
Normally, above ground pump motors less than 2 hp can be wired for either 115/230 volt operation

Submersible pump motors are normally 230 v only