Generac/Honeywell RTSK400A3 Automatic Transfer Switch 400A Single Phase 120/240V Non-Service Rated New

The Honeywell RTSK400A3 is a 400-amp automatic transfer switch designed for use with single-phase generators. Its NEMA 3R steel enclosure allows for indoor or outdoor installation, and the non-service-rated design requires a separate main disconnect. The switch supports whole-home backup applications and includes integrated load management for up to 4 air conditioner loads. A heavy-duty ETL-listed contactor is built in for dependable operation during utility outages and restoration.