Light switch back box for light circuit wiring

[davphi338]

Hi,

I am considering using the light switch back box for all cable connections rather than a junction box or ceiling rose. I intend to use spring clip connectors (Wago) in the back box.

i am going to install 35mm or 47mm back boxes but the issue I forsee is that one of the light switches is 3 gang 2 way switch.

This means I will have x5 1mm T+E and x3 1mm 3 core+E going into the back box.

Is this feasable or should I wire in a different method?

Thanks for any advice

 

[EFLImpudence]

Yes, it's feasible, but

surely you will only need a Wago for the Neutral wires - and possibly the CPCs(earth wires) if using plastic switches.

An ordinary connector block would be smaller.

 

[crystal ball]

As above, you could always do a dry run if you are concerned

 

[securespark]

If you use Hager accessories, their switches have a N terminal built-in.

I wouldn't say you need 47mm, unless there are dimmers and lots of wiring in the boxes.

 

[davphi338]

Yes, it's feasible, but

surely you will only need a Wago for the Neutral wires - and possibly the CPCs(earth wires) if using plastic switches.

An ordinary connector block would be smaller.

Would the live wires simply go into the switch face plate?

 

[dannyboi2003]

Would the live wires simply go into the switch face plate?

If you are asking such a basic question like that then I think it's best you engage the services of a qualified electrician to carry out this work for you.

 

[davphi338]

I don't think it's that basic. I've just never made all the connections in the light switch back box before only ceiling rose and junction boxes. I was going to use wago for the live connections (5 way with fly lead to L1 on switch face plate) as I thought it would be tidier. The light switches are metal flatplate with no neutral terminals.

 

[AndyPRK]

yeah it's possible if using 1mm.

I'm sure my house has 5 cables going into a 25mm single, 3 gang
earths to back box and neturals jointed. (don't needs wago as its accessible)

 

[AndyPRK]

don't need wago for the live connections

live in to Com, wire link to the next Com, wire link to next Com, then wire out to next room

 

[davphi338]

Thanks for the helpful reply. That's what I envisaged although I think there will be 8 cables coming into box as it's a 2 way 3 gang switch. Loop in, loop out, x3 to light fitment and x3 to other 3 gang switch.

 

[EFLImpudence]

 

[EFLImpudence]

live in to Com, wire link to the next Com, wire link to next Com, then wire out to next room

The lives won't go to COM with 2 way switches.