My cruise airs draw 11-12 amps which means 24 amps per leg with all 4 running,I usually see 35-40 amps per leg with battery chargers,water heater,water pump,etc. running on each leg total.
I'm running all 4 right now and drawing 36.7 amps on one leg and 34.4 on the other. It only becomes an issue if both the hot water heater and pump kick on at the same time.