The Honeywell RTSE200A3CSAH Transfer Switch employs CUL rated circuit breakers on the utility side of the transfer contactor for full downstream protection. The aluminum enclosure is rated for NEMA/UL Type 3R installation and is fully protected from the elements. Housed in an aluminum NEMA/UL Type 3R enclosure, the heavy duty Generac Contactor is a UL recognized device that's designed for years of service. The control at the generator handles all the timing, sensing and exercising functions. This transfer switch is electrically operated and allows for swift and positive connections (160 millisecond transfer time). Rated for all classes of load and 100% equipment rated, this Honeywell Transfer Switch is both inductive and resistive. The Honeywell RTSE200A3CSAH Transfer Switch features a dual coal design with main contacts that are silver plated or silver alloy to resist welding and sticking.