The service is 225 amps for the house. The generator/transfer switch are rated at 100 amps. Generator controlled circuit breakers will drop enough circuits in the house to keep the generator happy.
It sounds like a contactor rated for 225 amps would work to disconnect the mains service before the generator fires up, then let the transfer switch relay dump the generator to the house feeders once the warmup period has elapsed. I just thought an external relay (or contactor) rated for the full normal service current would negate the need for two separate electrical items.
The transfer switch has all the bell and whistles, it just isn't built into the generator as some are. I'm well aware of the safety issues! Thanks for the response!
