How many CPCs in a metal backbox?

[aoused]

Hello,

I am going to make a small modification to my new build electrics. In the downstairs hallway I have a 2-gang switch. Gang 1 controls outdoor light, gang 2 controls upstairs and downstairs light (further two switches upstairs do same).

Neutrals are at the switch.

Downstairs pendant is paralleled off of upstairs pendant. Gang 2 is fed with a piece of three core from the upstairs switch.

I'm going to replace the 2-gang with a 3-gang so I have outdoor light, downstairs, upstairs. The only drawback is that I won't be able to turn downstairs on from upstairs but I can live with this as I don't want to run a new piece of three core.

To accomplish this, I will be running a new piece of 1mm from the downstairs switch to the downstairs pendant. I'll disconnect the run between both lights at both ends and Wago it off in the ceiling void for good measure.

So my question - how many CPCs (1mm) can you have going to a single terminal on the metal backbox? At the moment it's five (upstairs switch, downstairs loop in & out, outdoor light). Can I make it six or should I bring everything into a 7-way Wago and fly out to the back box?

 

[AndyPRK]

Hey, You in Gloucestershire?

 

[aoused]

Hey, You in Gloucestershire?

East Mids...

 

[EFLImpudence]

Can I make it six or should I bring everything into a 7-way Wago and fly out to the back box?

It doesn't matter as long as all are connected satisfactorily.

A metal switch faceplate would, of course, also require earthing.

 

[RF Lighting]

I reckon about 14 is my record

 

[aoused]

It doesn't matter as long as all are connected satisfactorily.

A metal switch faceplate would, of course, also require earthing.

Thanks for this, this is what I'm thinking about and how best to achieve. Plastic face plate (Hager) with no CPC terminal.

I take it the earths shouldn't be twisted together and I presume doubling over won't be possible.

Basically if they all go in and survive a tug test, this is acceptable?

 

[EFLImpudence]

I take it the earths shouldn't be twisted together and I presume doubling over won't be possible.

They should not and it won't be.

Basically if they all go in and survive a tug test, this is acceptable?

Yes, of course. They will be a more secure with six than one on its own.

 

[sparkwright]

Why not make things easy, and put some in a connector block, some in the box terminal, and a wire between?