Updating electrical to 220 volt
Sometimes they are mounted side to side rather than up and down - just to confuse things.
For safety, it's best to make sure all breakers are in the "off" position before plugging in AND unplugging.
Some older campgrounds only have 20 amp service or 15 amp service.
You will enjoy the peace of mind and ability to run all your appliances when you have 50 amps, and you can easily go down to 30 amps when necessary.
You'll notice on the campground pedestal image below that there are four* breaker switches.