Generac/Honeywell RTSM400A3 Automatic Transfer Switch 400 Amp Service Entrance Rated Single Phase 120/240V NewThe Honeywell RTSM400A3 is a single phase 400 amp automatic sync transfer switch designed for 120 240V single phase generators. It can easily manage two large loads out of the box using Digital Load Management technology, helping optimize generator capacity without requiring additional hardware. The switch uses advanced load shedding and can be expanded with up to four DLM modules for additional load management. Its service rated design and aluminum