I currently have a light which is fed from a switched fused spur.
In the spur i have load (live neutral and earth) and supply (live neutral and earth)
I want to run a second switch from the spur and i understand that the connections between switches requires 3 core cable i am confused as all diagrams i have seen show a "com" on the back of the spur (a place for the 3rd cable) but mine does not have one does this mean i cant do this or i need another spur with a "com" connector on it?