Generac 100A Service Entrance Rated Three Phase Automatic Transfer SwitchProduct Description 100A SERVICE ENTRANCE RATED THREE PHASE AUTOMATIC TRANSFER SWITCHThis Service Entrance 100A three phase automatic switch features a NEMA 3R outdoor rated enclosure and a heavy duty contactor designed for years of service. This switch features a 2 year limited warrantyNEMA 3R OUTDOOR RATED ENCLOSUREDesigned to give options as to whether to install indoors or outdoors, this enclosure protects the internal components of the switch