[jsb5717]

Originally Posted by notanlines

I don't see a problem as far as being protected. I see a problem down the road when they camp with 30 amp 'only' service. They would plug in a 30 to 50 dog bone, then the surge protector, then a regular 50 to 30 dog bone and then the RV. A little too convoluted, but, as the old punch-line goes, "It's not my dog."

In theory you could use an adapter to plug the 50 amp protector into the 30 amp service, then use another adapter to plug the 30 amp trailer into the 50 amp protector.

I assume the adapters all follow a standardized system for which wire to drop in the step up/step down process. The Surge Protector should indicate whether the above contraption still provides adequate power to the coach.

In the end, if the protector is suitable for step down use, it's still protecting against a serious surge up to its rating.