Originally Posted by StephanFR3
Is there an adapter for this or is this 220?
Without being there with a multimeter I can't be sure, so take this at your own risk..
It looks like a L14-30 (it will likely say this on plug somewhere) which has 2 hot wires for 240 also a ground and the neutral. An adapter that just uses one of the hots and the neutral and the ground should feed your rv just fine.
If it is the plug that I think it is, and it's wired correctly, here is how it and the adapter would be wired