Transfer Switch Solutions for Service Entrance Applications

Manufacturers offer Automatic Transfer Switches (ATSs) with integrated electrical service disconnect equipment. This paper explains the benefits of using these ATSs at service entrance locations, reviews industry requirements for their design, and describes responding features of Service Entrance Automatic Transfer Switches (SEATS).

Combining transfer switching mechanism and a service disconnect into a single piece of equipment provides advantages that include simplified design, specification, and installation as well as lower overall costs. UL 1008 and the NEC provide specific requirements for the configuration and use of this type of transfer switch. Manufacturers offer responding models that offer easily accessible disconnect mechanisms, integrated overcurrent protection, and ground fault and switched neutral options.