Bobbo wrote:
Looks to me like you could cut off that 30 amp plug and replace it with a 50 amp plug. There should be 4 wires in there, not 3. You should have NEUTRAL, GROUND, L1, and L2.
Not necessarily !
That appears to be an L7-50P on the RV or possibly something else. Based on the label on the RV, I am betting that is not the original plug. I would have an electrician change it to the standard RV plug which is NEMA 14-50P. Note this is non-locking plug. If you want a locking plug, it would be an L14-50P but you would likely have to use an adapter (dog bone) to plug in at any RV park.