FEATURES •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 assembly. Dual frame mounting holes.