Motor, 3-Phase, Totally Enclosed Fan-Cooled Motor Enclosure Design, 50 hp HP, Nameplate RPM 1,200, Frame 365T, Voltage 230/460V, 60 Hz Hz, Three Phase, Full Load Amps 115.0/58.0 A, Ins. Class B; F, Motor Service Factor 1.15, Ball Motor Bearings, Motor Frame Material Cast Iron, Max. Ambient Temp. 104 Degrees F, Nominal Efficiency 94.1 Percent, CE, CSA Certified, UL Listed