• IP-55 cast iron, Meets or exceeds NEMA Premium® efficiencies, NEMA Premium models are in compliance with EISA2007 • Class F Insulation System, Inverter duty 10:1 variable torque and 2:1 constant torque & 1.15 service factor on Sine Wave Power 1.0 SF on Inverter Power • F1/F2 capable, Dynamically balanced rotors, Steel conduit box • Dual Frame Mounting • Modifications and Kits are available • Division 2 Class 1 groups A,B,C,D this is for TEFC models, • 40°C Ambient 1.15SF Sine Wave Power and 1.0SF inverter power • UL®* listed, UL certified for Canada and CE®* mark