Lighting Switch Wiring Query

[lviren]

Hi,

I started to wire a 2nd switch for the light in my garage; there is a light switch beside the garage main door but not at the small entrance door that leads into my house.

I installed the new switch and ran the cable to the existing switch = thinking that all I had to do now was open up the existing switch and attach the wires. However what I found confused me.

In the existing switch which is one way, there are 2 cables entering the switch both having a red wire, black wire and earth wire. The red wires from the different cables are wired one to the com and the other to L1. The 2 black wires are joined together by a cable connector.

I looked at the light bayonet fitting and it has a red, black and earth cable.

Is the 2nd cable the power supply and if so should I install a junction box or...?

Any help greatly appreciated.

 

[ban-all-sheds]

[sigh] Look at the last diagram here: //www.diynot.com/wiki/electrics:lighting-circuit-layouts [/sigh]

 

[lviren]

Many thanks.

 

[Alarm]

Just checking your using Wiki BAS

 

[Stoday]

I installed the new switch and ran the cable to the existing switch

You did use 3-core & earth cable didn't you?[/b]

 

[lviren]

Yes I did use 3 core plus earth cable. I expected the supply to come from the rose and hadn't experienced direct supply to the switch. I didn't want to proceed before checking the facts.

Thanks