I have a new to me camper that I'm trying to plug in for the first time. The surge protector I ordered didn't match up to the cord that came with the camper. Since I'm using a 30amp to 15amp adapter to plug into my garage and only intend to run the AC on low, would this be safe to plug in? I have the breakers off to everything but the AC. 
Thanks!
Anxious 1st-time owner

Thanks!
Anxious 1st-time owner