The US Motors U10R9C (Model C877) is a 10 HP three-phase definite purpose motor rated for 460 V, 60 Hz, 1770 RPM. It features a TEFC enclosure, a 256 frame and horz-footed mounting. Additional features include three phase unimount, totally enclosed fan cooled (TEFC), multi-speed and constant torque 1800/900 RPM one winding.