I wish to be able to switch a lamp on the upstairs landing from three different positions, it is currently run on two way 1G switchs.
The switched live twin & earth cable comes in at top of stairs plus existing three core to switch at bottom of stairs, wired (twin red to L1 & black L2) and threecore (yellow L1, Blue L2, Red com).
Having run a new three core cable to the other end of the landing and connected new switch like for like with the existing threecore cable at the switch on the top of stairs. I can get all switches to switch on and off seperatly, however if any one switch is left in the on position the remaining two will not function.
This has got me beat i have to admit!
What wiring connections are required to run three way switching?