20 hp 1800 RPM, 54.0 amps 200 Volts 60 Hz Three Phase MotorNEMA 256T Cast Iron frame Keyed Shaft 1 5/8" Diameter x 4"Service Factor: 1.15, Overload protection = NoneRigid Base Mount, Ball Bearings, Class F Insulation, Reversible1 Year Manufacture WarrantyFor use in cooling tower and evaporation cooler applications. Corrosion resistant, Inverter Duty (10:1 speed range). Wiring diagram on motor name plate. TEFC = Totally Enclosed Fan Cooled. GM53