Car wiring diagrams: 3 Phase Wires Wiring Diagram, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. Three Phase Wiring Diagrams. ALWAYS USE WIRING DIAGRAM SUPPLIED ON MOTOR NAMEPLATE. colored leads are only applicable on the NEW . Three phase systems can be three phase three wire or three phase four below shows schematic diagram for industrial three phase wiring.. if you don t sure that how to wire a phase energy meter, then Free Circuit Design Schematic Simulation PCB Layout Gerber Viewer.