Switch Wiring Diagram Uk. 2 way light switch 3 wire system new harmonised cable colours 2 way switch 3 wire system old cable colours 2 way switch two wire control three way switching. Your lighting circuit must have an earth cable terminating in the switch back box and also at the switch plate if it is metal.
Circuit electrical wiring enters the switch box. Your lighting circuit must have an earth cable terminating in the switch back box and also at the switch plate if it is metal. The next length of the twinearth cable will run from the light to the first two way switch.
2 way light switch 3 wire system new harmonised cable colours 2 way switch 3 wire system old cable colours 2 way switch two wire control three way switching.
For simplicity the earth wire is not shown in the above diagram. Featuring wiring diagrams for single pole wall switches commonly used in the home. The next length of the twinearth cable will run from the light to the first two way switch. Switch wiring shows the power source power in starts at the switch box.
