• 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 • IP55 enclosure on cast iron frames • Inverter Duty 20:1 Variable Torque and 10:1 Constant Torque • Class F Insulation • Standard F1, reversible to F2 assembly. Dual frame mounting holes.