20 hp 1800 RPM, 58.0/29.1 amps 230/460 Volts 60 Hz Three Phase MotorNEMA 256T Rolled Steel Frame, Keyed Shaft 1 5/8" Diameter x 4"Service Factor: 1.15 Overload protection = NoneC-Face Mount, Ball Bearings, Class F Insulation, Reversible1 Year Manufacture WarrantyFor fire pump applications per NFPA 20 where contaminants are minimal. Wiring diagram on motor name plate. ODP = Open Drip Proof. HE92