Abstract: A pin-and-socket type reversing plug connector for three-phase alternating current motors has three phase pins and two internally connected ground pins in a motor-connected member and corresponding sockets in a line-connected member. The five pins and sockets are arranged in a straight line, with a phase pin in the middle with the two ground pins on either side of the central pin. To reverse direction of rotation of the motor, the two connector members are unplugged, one member is rotated 180.degree., and the two members then rejoined.