electrical 50 to 30 amp
When you utilize a 50 amp service for 30 amp RV you need to understand the supply breaker is 'not' protecting you. Note the 50 amp service has 2 X 50 amp breakers, that is 100 amps of power. A 30 amp service has 'one' 30 amp breaker. When you plug a 30 amp RV supply line into a 50 source you have a 50 amp breaker in front of a 30 amp service. So, that means 'no' protection for the 30 amp RV, at least at the source.