Generac Trans Sw 100A Non-Service Entrance Rated Three Phase Automatic Transfer Switch100A NON SERVICE ENTRANCE RATED THREE PHASE AUTOMATIC TRANSFER SWITCH This Non 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 warranty. NEMA 3R OUTDOOR RATED ENCLOSUREDesigned to give options as to whether to install indoors or outdoors, this enclosure protects the internal components of the switch from rain,