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Old 06-24-2020, 03:53 PM   #9
TurnerFam
Senior Member
 
Brand: Thor Motor Coach
State: Georgia
Posts: 2,585
THOR #4735
A 30amp breaker is well designed and capable of powering BOTH roof a/c units at the same time, since they are both 13.5kw capacity, or similar. Originally, though, manufacturers built in the 'dummy' switch so that owners didn't automatically assume that both would run on 30amp service, even though they CAN, with a little electrical 'management' while doing so - meaning that you must be cautious and make sure to limit other loads, such as battery charger/converter, electric water heater, and the use of certain 'high-amp' appliances, like the microwave and usage of a hair dryer, electric fryer, etc.

I have seen some models of 30amp coaches with two a/c units on the roof that do NOT have a 'either' switch - but they came later and are more recent than many current owners have.

If you are determined to run both, then you basically have to defeat/work around the installed switch that keeps from operating both at the same time, while on Shore Power. Apparently the switch is smart enough to know which 'type' of electrical service you are on, since they will both run together while on the generator.
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the Turners...
two Campers, two Electric cars
former diesel pusher traveler
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