Surge Guard's Model 41260 Automatic Hardwire Transfer Switch transfers to generator power automatically when energized after 30 second delay (generator mode). When both shore and generator power are available, generator dominates after a 30 second delay. Once generator shuts down, shore power activates after 3 second delay. It provides protection against power surges, open neutral, and reverse polarity. It offers multi-mode surge suppression and 50A, FLA mechanical interlocking contactors. UL approved – UL 1008 full transfer switch rating. UL/CL listed.