3 phase motor change from 440 V to 220 V with diagram question You have a Dual Voltage Wye-Connected Start Delta-Connected Run Motor. The chart above agrees with your connection drawing. The wye connection allows starting the moor at reduced current and torque to overcome locked-rotor, with the delta connection for full speed and rated current. You should get a 12 lead star-delta starter. Three Phase Motor Power & Control Wiring Diagrams Two Speeds One Direction Three Phase Motor Connection Power and Control Diagrams; Two Speeds, Two Directions Multispeed 3-phase Motor – Power & Control Diagrams; Multi Speed 3-Phase Motor, 3 Speeds, 1 Direction – Power & Control Diagrams; One line Diagram of Simple Contactor circuit. Three Phase Electrical Wiring Installation in Home REV / FOR Three-Phase Motor Connection Power and Control diagrams Three Phase Motor Connection Reverse and Forward Power and Control wiring diagrams (Two Direction one speed) Abbreviations: O/L = Over Load Relay NO = Normally Open NC = Normally Close REV = Reverse FOR = Forward . REV / FOR Three-Phase Motor Connection Power & Control Diagram. REV / FOR Three-Phase Motor Connection Power diagram Power How to Wire a Single-Phase 230V Motor | Hunker Open the wiring box cover by removing the screws and verify there are four wires inside the box for wiring the motor. Look at the underside of the cover for the wiring diagram, which specifies which wires are used to wire the motor for 240 volts. The wiring diagram will show that two of the motor wires are connected together for 240-volt wiring.