Reliance Controls TF151W Easy/Tran Transfer Switch for Generators, Small, Gray Designed for control of a single circuit in the event of power failure and uses standard grounded extension cord 18-inch pre-wired aluminum conduit allows for easy connection at circuit breaker panel Maximum generator running watts: 1,875 Maximum single-pole circuits: 1, Maximum double-pole circuits: 0 Power can be supplied from portable generator, inverter, RV generator, fuel cell or any standby source capable of producing sufficient current