It can be generally assumed - tongue in cheek - that any residential refrigerator will run on 15A. You have to understand start up v. running current draw. Any appliance takes momentarily higher current to start cycling if it has a motor, compressor, or any other high current draw. If other high load appliances are operating - AC, Furnace, water heater on elec., fireplace, and etc. then you will draw down the 50A total supplied to the site power pedestal. So long as total current used by all operating appliance at the same time is below the current supplied to the pedestal (50, 30, 20, or 15A) all appliances should operate properly. It's knowing what the pedestal truly has as supply, what your TT requires to function at peak usage, and what others in the park are consuming off of the line that supplies your pedestal. When summer peaks there is generally not enough power in a Campground to supply the entire park when everyone is running AC, fridges are maxed, fans are running, and everyone is operating an outdoor fridge.
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