Square D,200A DT 240V 4P NOT-FUSIBLE T-3R ENCD SW,200A,250 V DC240 V AC,3R,4,Double Thorw Safety Switch used for manual transfer of one load between two power sources,Double Throw,N,NEMA 3R,Rainproof and Sleet/Ice proof (Indoor/Outdoor),Safety Switch,UL 98 Listed