20 horsepower electric motor explosion proof hazardous location, 256T frame, 3 phase, 208-230/460 volt, 3600 rpm,NEMA Premium Efficient. Class 1, Division 1 Groups C&D, Class 2, Division 1 Groups F&G.Three Year warranty! Free Shipping!Motor Drawing & Nameplate InformationHP: 20RPM: 3531Frame: 256TVoltage: 208-230/460Amps: 50.4-45.6/22.8Efficiency: 91.0%Phase: 3SF: 1.15Shaft: 1 5/8" x 4"Enclosure: Explosion ProofWeight: 434 lbs