Match the real connection
Find out if the RV and the campsite use 30 amp or 50 amp service. Look at the plugs, the markings on the cord and the outlet it plugs into. A plug that looks alike does not prove it is a safe match.
Source: RV Industry Association (opens in a new tab)
Inspect it before you turn on the power
A portable tester or surge protector can catch some faults. Which ones depends on the model. Before you rely on preowned electrical gear, read the unit's instructions and check its condition. Make sure its lights act the way the instructions say they should.
Source: RV Industry Association (opens in a new tab)
We checked this information on September 26, 2026. Before you use a product, follow the maker's current instructions for that exact model.
Common questions
How do I know if my RV is 30 amp or 50 amp?
Check the service for both the RV and the campsite. Look at the plugs, the markings on the cord and the outlet it plugs into. A plug that looks alike does not prove it is a safe match.
Will a surge protector or tester catch every fault?
Not always. A portable tester or surge protector can catch some faults, and which ones depends on the model. Read the unit's instructions.
Is preowned electrical gear safe to use?
Read the unit's instructions and check its condition and its lights before you rely on it. We check the plugs, ratings and function on every electrical item before we sell it.