2 lights /one switch

[AS]

If I have 2 lights operating from 1 x 1 gang switch on a junction box system - I can have JB with 2 core switch cable and light cable coming off and then I string a cable from first light to second light .If I want a 2 way switch and I run 3 core 2 way from 1st 1 gang switch to second 1 gang switch, do I also need 3 core switch cable coming out of the JB instead of 2 core.

Can I achieve 2 lights /1 switch by having JB with 1 switch cable coming out and 2 light cables coming out and strap the 2 x 1 gang switchs together with 3 core.

 

[Paul_C]

If I want a 2 way switch and I run 3 core 2 way from 1st 1 gang switch to second 1 gang switch, do I also need 3 core switch cable coming out of the JB instead of 2 core.

No, if you have a 3-core between the switches you still only need a 2-core (plus earth) from the j-box.

Can I achieve 2 lights /1 switch by having JB with 1 switch cable coming out and 2 light cables coming out and strap the 2 x 1 gang switchs together with 3 core.

If you mean the two lights go on and off together on the 2-way witching circuit, then yes, that's all you need.

There are other ways to go about the wiring, but it is always possible to convert a simple 1-way (on/off) switch to 2-way by running a 3-core cable between the original switch location and the new switch.

 

[plugwash]

for that matter it is always possible to add an extra switch to an existing two way install by running a 3&E from either of the existing two way switches to the new switch location.