Color Coded Three Phase Wiring Diagram. The usa have their own wiring colours for electrical circuits black red and blue are used for 208 vac three phase. Thermal contacts tb white m 1 z2 yellow z1 blue u2 black u1 red bridge l1 and l2 if speed controller sc is not required m 1 ln e white.
And this is what you will need for 3 way switch wiring. Phase 1 phase 1 wiring should be brown. Brown orange and yellow are used for 480 vac.
In three phase supply motors and large electric heaters can be directly connected to the three phases neutral is not needed in all cases while in single phase load circuits light fan etc can be connected in between phase and neutral through proper protective devices eg.
Phase 1 phase 1 wiring should be brown. In three phase power supply the combination of black red and blue wires for power conductors are used for 120240v ac whereas the combination of brown orange and yellow wires for power conductors are used for 277480 v ac. Diagram dd6 diagram dd7 m 1 ln e diagram dd8 ln e l1 l2 l3 sc z1 u2 z2 u1 cap. Orange is only appropriate when the system has a grounded delta service regardless of voltage.