•Meets or exceeds NEMA Premium® efficiency. Model is in compliance with EISA2007 •IP55 enclosure on cast iron frames •Inverter Duty 10:1 Variable Torque and 2:1 Constant Torque •Class F Insulation 40C Max Ambient, 1.0SF on Inveter Power and 1.15SF on Sine Wave Power •Standard F1, reversible to F2 assembly. Dual frame mounting holes. •C-face addition may result in non-NEMA "BA" dim. For new "BA" dim consult chart found in modification section •Hazardous Duty Division 2, Zone 2, Class I, Groups A,B,C,D, Temperature code T2B •UL® Recognized & CSA certified and CE® Mark