Technical Specification: General Purpose motor Application General Application Motor Type 3-Phase Enclosure Totally Enclosed Fan-Cooled HP 50 Nameplate RPM 1775 Frame 326T Voltage Hz 60 Phase 3 Full Load Amps 131.0-118.0/59.2 Number of Speeds 1 Mounting Base Mounting Position Horizontal Thermal Protection None Insulation Class F Service Factor 1.25 Bearings Ball Frame Material Cast Iron Max. Ambient Temp. 40 Degrees C Rotation CW/CCW Shaft Dia. 2-1/8 Shaft Length 5-1/4 Length Less Shaft 25-7/8 Overall Length 31-1/8 Shaft Type Keyed RPM Range 1701-1800 Standards UL, CSA, CE, NOM, NEMA Class 1, Div 2, Groups B, C & D Duty Continuous Efficiency Group High Efficiency and NEMA Premium(R) Nominal Efficiency 94.5% 3 Footnotes 23.