GT1222A Marathon 15HP Globetrotter Electric Motor, 1800RPMFeatures Meets or exceeds NEMA Premium efficiency. Model is in compliance with EISA2007 Hazardous Duty Division 2, Zone 2, Class I, Groups A,B,C,D, Temperature code T2B CONSTANT 10: 1 VARIABLE 20: 1 IP55 enclosure on cast iron frames IP55 enclosure on cast iron frames Inverter Duty 10: 1 Variable Torque and up to 10: 1 Constant Torque Inverter Duty 20: 1 Variable Torque and 10: 1 Constant Torque Class F Insulation Standard F1, reversible to F2