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Old 01-11-2019, 02:15 PM   #11
western NC mountains!
 
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Join Date: Jan 2017
Location: western NC mountains!
Posts: 1,475
also, while 30amp RV service is a simple 3 wire system, HOT, Neutral, and Ground wires thru a normal 30amp breaker, for simple 120v service...

50amp RV service is very different - it adds ANOTHER Hot wire, the wires are larger, and they run thru a 50amp Double-Pole breaker, which is 240v service, like at your home...
while most RVs or Motorhomes with 50amp service don't make use of the 240v service, their breaker boxes are designed to split the two 'LEGS' of power between all of their breakers, especially since the two Roof Air Conditioners are the major draws, and when run simultaneously they sometimes cause tripping issues when only on 30amp power. With 50amp RV service, each 'SIDE' of power has a full 50amps of power, which equals to more than triple that of the typical 30amp campground service.

Also, generally, the Shore Power pedestal 'box' is larger, and also integrates a 30amp outlet, and a dual 20amp 'residential' style GFCI outlet(usually for tent campers)...


so you're not only having to add more and larger wires to accomplish 50amp service, your adding the additional cost of a larger post-mounted multi-outlet box.

...our local county campground is in the middle of this upgrade as we speak, though for the life of me I'm not sure why a local $17 per night campground with a majority of seasonal campers needs to 'upgrade'... but, oh well. It will take them a LONG time to recoup this huge cost.

While you may be experiencing power issues, as you originally alluded to, I'm sure you can continue to run both roof air conditioners on 30amp service - we do.
Yes, you have to watch and manage your other draws, like when you need to use the microwave, or electric water heater, but really, it's possible, just a little more work involved.
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