2 Way Light Switch Wiring Diagram Old Colours. You have an incoming hot wire black going to one screw it does not matter if you use the brass or silver screw on the side of the 2 way switch and a black wire from the other screw on the 2 way switch going to the load light ceiling fan etc. The blue and yellow wires in cable d and the black wire in cable c are switched lives and thus should be marked with red sheathing at each end as shown.
When you employ your finger or perhaps follow the circuit along with your eyes it s easy to mistrace the circuit. Just like you find on the plug of any appliance. 3 way light switching new cable colours 3 way light switch old cable colours 3 way light switch using a two wire control.
The wiring colours changed a number of years ago from live red neutral black.
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. A 2 way switch wiring diagram with power feed from the switch light. You will see that there is a hot wire that is then spliced through a switch and that then goes to the hot terminal of the light. You have an incoming hot wire black going to one screw it does not matter if you use the brass or silver screw on the side of the 2 way switch and a black wire from the other screw on the 2 way switch going to the load light ceiling fan etc.
