The inverter rated wire is a common insulation component in electric inverter-duty motors. The inverter rated wire is important for helping to control the motor’s speed. Inverter-duty motors are designed to operate at relatively low speeds. They are also designed to withstand considerable amounts of heat, which in turn prevents them from overheating. The inverter rated wire helps the motor have a wider speed range with constant torque than a standard motor. As with other insulation components, the inverter rated wire is grouped in several classes. The wire’s class determines the maximum temperature it can safely withstand.