Hall/staircase switch lighting cct diagram?

Question

any good sites for cct diagram for wiring of staircase switch lighting .. something easily understood and to follow

Answer 1

I don’t know of any good sites with diagrams of two-way switches, but I will try and explain.

In one of the two way switches you will have two cables, one – two core and earth, black and red or the new colours, brown and blue , this comes from the light fitting or pendant and is called the switch wire. The other cable is three core and earth - red, yellow and blue or brown, black and grey.

In the other switch you will have just the three core cable as mentioned above.

In the first switch the wiring should be as follows:

Two core cable Brown to L1

Two core cable Blue to L2

Three core cable Brown to C

Three core cable Black also to L1

Three core cable Grey also to L2

The bare wires should be sleeved with green and yellow and connected to the back box.

In the second switch the wiring should be as follows;

Brown to C

Grey to L2

Black to L1

The bare wire should be sleeved with green and yellow and connected to the back box.

If you have an existing light that you want to make two-way, then you need to run a new 1.5 three core cable from the existing switch to the position of the additional one.

If the first switch is only one-way - it will only have two connections on the back, this is no good and needs to be replaced with a new two-way switch. This will have the required three connections on the back. The additional switch will have to be the same.

Remember.

Twin and earth cable

Brown = Old Red

Blue = Old Black

Three core and earth cable



Brown = Old Red

Black = Old Yellow

Grey = Old Blue