Old 2 Gang Light Switch Wiring

[Jtdyson]

Hi

I have this lighting socket but it has no markings, does anyone have any idea what is L1,L2 and Com

Many thanks
J

 

[ericmark]

Black is one com, two reds the other.
Single red is switched on/off to the two reds.
Blue and yellow will connect to the black which one will depend on switch position.

 

[RandomGrinch]

...and if you wish to replace the switch, they are generally known as "2 gang, 2 way" light switches.

 

[SUNRAY]

Black is one com, two reds the other.
Single red is switched on/off to the two reds.
Blue and yellow will connect to the black which one will depend on switch position.

Correct, this may help:

The 2 sets of terminals each side of the line

 

[Jtdyson]

That is great … thank you for everyone’s help with this