Esco ES50M-65N Automatic Transfer Switch from Power Cord to Generator 3 Pole N.O. 240 VAC 50Amps/Pole Automatic switching between shorepower, generator and inverter Heavy duty contactor assembly specifically designed for rigorous use, will handle 50 amp power cord and up to 12kw generator Transfers both hot and neutral legs simultaneously Economical and reliable time delay switches automatically from shoreline to generator power Capable of monitoring for low generator voltage