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Automatic transfer switches must also be operated monthly. The monthly test. consists of electrically operating the transfer switch from the standard position to. the alternate position and then a return to the standard position.
How do I know what size transfer switch I need? There are many factors that will determine the size transfer switch needed (size of utility service, appliances needed to run, size of generator, etc.). The transfer switches vary in size from 50, 100 and 200 amps. The 50 amp transfer switch has a sub panel in it capable of connecting to eight circuits.