[BB_TX]

I agree that circuit breaker panels/load centers may be different. But the incoming power to that load center, RV or home, is 4 wire 240/120 vac split phase power.

The panel in my Monte has the main 50 amp breaker at one end and the sub breakers next to it alternating between H1 and H2, i.e. odd number breakers are on one hot and the even number breakers on the second hot. If I wanted I could install a double pole breaker and operate a 240 vac appliance.

However some Montes have the main breaker in the middle with one hot on one side and the other hot on the other side, with sub breakers on each side of the main. That configuration does not work for a double pole breaker to get 240. But again, the incoming power to the panel is the same 4 wire 240/120 split phase power.