How much Current do your RV Appliances draw?

The typical RV is usually designed with either a 30-Amp or a 50-Amp 220-VAC Service that powers all of the electrical equipment and appliances the owner may want to use while camping.

Even though the electrical power supplied to these RV’s is designed to be adequate for the average family while they camp, far too often the added equipment that may be used will overload the circuit breaker systems in the camper.

S,o, I have written an article on my HubPages site that provides two things that can help the camper figure out what their problem might be that caused their breaker to “kick out”.

First of all, in this article I have provided a table of the most common electrical appliances and equipment that the typical camper brings into their RV.  This table lists the amount of Current these common appliances will draw so that the owner can calculate the possible overload conditions they might have with their electrical receptacles.

And, for those of you who have an appliance that they use but do not know how to figure out the actual Current it may use, there is the simple formula you can use to calculate the Current an appliance might use if the label only lists the wattage of the appliance.

The formula is simple to use and anyone can easily calculate the actual maximum current for these appliances.

NOTE: Typically, the lights in your Camper operate on your COACH (AUX) 12-VDC electrical system which is powered by your RV’s 12-Volt batteries.

But remember that at times, if your batteries drop below a certain limit of stored charge, your AC/DC Converter will kick in and can add even more current load to your 110-VAC power source  as it charges your batteries back to their normal level.

So, click on the link below to go to my article on my Writer’s site  and check out which of the appliances you are using that might be causing your problem.

How to Calculate the Current used by your appliances in your RV

by Don Bobbitt,  All Rights Reserved




  1. Can you convert the 50 amp to a 110 amp and use an extension cord to plug in extra appliances ie( electric frying pan and toaster) We use the 30 amp hookup for our camper. We are constantly blowing fuses.


    • Julie – I guess you mean 110-VAC. Actually you can purchase a couple of adapters at your local RV parts store. they make one that adapts the 50-Amp conn. to a 30-Amp receptacle, and they make on that adapts the 30-Amp conn to a 15-Amp receptacle. I use these when I am in a campground that only has 30-Amp service, and often when visiting people’s homes that only have a regular outside receptacle available for me to use.
      So, if you are connected to the 30-Amp service with your RV you can use these adapters to supply power to an extention cord.
      Good Luck,


    • Check if it has a wattage rating on its label.
      If so divide this number by the AC=Voltage, or 120 VAC.
      So for a simple example, a 1200 Watt Ice Maker would draw 1200/120 or 10 Amps.
      Try this for your maximum Wattage rating number for your Ice Maker.


  2. can I use the parking light circuit on tow vehicle to keep battery on towed vehicle charged while small RV regrigerator is operating?


    • That’s not recommended. For one thing, while on the road, your parking lights are not lit. Usually when being towed, all towed vehicle power is turned off. and the brake/tail/signal lights get their power from the towing vehicle. So, without more information, I assume you have a small fridge you want to put into your towed vehicle and you want to power it from the towing vehicle while on the road. The problem is always going to be just how much current does this fridge draw. In my opiion,if tit draws a maximum of only a couple of hundred milliamps, then the wiring can take it safely. If it is much higher than this, the wiring could overheat and the insulation could melt causing an electrical danger. Good Luck! Don


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