Quote:
Originally Posted by NH_Bulldog
Think of it this way: If you have wiring in your house that will support a 15a load (14ga), and you connect that to a 20a breaker (intended for 12 ga wire), what will happen if you overload that 15a wiring? The breaker won't trip before the wires melt and will start a fire. In this case, unless you have a 30a breaker/surge protector, the wiring in the camper will be toast before it trips that 50a breaker/surge protector. Kind of defeats the purpose of a surge protector doesn't it?
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A surge protector isn't a fuse or circuit breaker. Fuses and circuit breakers protect against over-current. Surge protectors protect against over-voltage. Whether you use a 30A or a 50A outlet, the voltage is still 120V between hot and neutral. An RV with a 30A adapter will be using only one of those legs. As long as the surge protector protects each of the legs independently, there's no reason you can't use it to protect a 30A RV.
(Though I do agree this is an awkward unit to manage when you're camping at a park with only 30A outlets.)