Keep RV electrical transitions orderly with the SouthWire 30-3771 Automatic Power Transfer Switch, designed to shift power between shore service and an RV generator. Built with dual 50A-rated Chint contactors, this switch provides reverse polarity and open ground protection while the mechanical interlock keeps both contactors from engaging simultaneously. A 30-second delay gives the generator time to come online before transfer, while the rugged plastic enclosure provides a secure housing without the corrosion and sharp-edge concerns associated with metal enclosures. Features:• Automatically prioritizes generator power• 30-second delay manages generator transfer• LED indicator displays polarity and ground conditions• Mechanical interlock prevents simultaneous contactor engagement• Plastic enclosure provides secure component protectionSpecs:• Brand: SouthWire• Product Number: 30-3771• Voltage: 120/240 Volt• Ampere Rating: 50 Amp• Contactors: Dual 50A Rated Chint• Mounting Type: Wall Mount• Color: Black• Length: 5.19 inches• Width: 8.48 inches• Height: 10.75 inches• Warranty: Limited 1 Year• Listing: UL Listed• Model: T6D Automatic operation 50 Amp rating Wall-mount design | Southwire 30-3771 Automatic 50 Amp Power Transfer Switch