RV 50A service is 2 legs of 120VAC, usually wired so there is 240VAC across the 2 hot legs. It's not 240VAC service, as both legs are referenced to a neutral. It's possible to wire an RV 50A outlet so the 2 hot legs are in phase and measure 0 between them, but this won't matter unless the RV has any 240VAC appliances.
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Jimmy Dean Ross
1988 Newell Coach
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