Extend ring final or....

roganty · 1 May 2020

Due to Covid-19 my plans to get someone in to rewire the house have stalled, but I am continuing with moving a wall myself.

Currently this wall has one double on the ring, with the new wall in place this will become three or four.

Originally my plan was for the rewire to change the ring final to radials (one for kitchen, one for rest of downstairs) mainly due to the fact that most of the new sockets will be at the far end of the house.

Should I wire this wall as a ring final, or could I wire this as a spur in 4mm² without using an FCU? (It was going to end up as a spur anyway)

(My next question will be how to wire up the kitchen

)

EFLImpudence · 1 May 2020

roganty said:
Should I wire this wall as a ring final, or could I wire this as a spur in 4mm² without using an FCU? (It was going to end up as a spur anyway)

It depends on the route of the ring circuit cables.

If they are both at one end of the wall, then a 4mm² spur - rather than two 2.5mm² in the same place..

roganty · 1 May 2020

EFLImpudence said:
It depends on the route of the ring circuit cables.

If they are both at one end of the wall, then a 4mm² spur - rather than two 2.5mm² in the same place..

I have an interesting setup under the floor for the wiring. It a box with downstairs and upstairs sockets and downstairs lights (Octopus wiring? - The name of the company is on the lid I'll update when I lift the floorboards)

Downstairs: two wires in/out to the CU. Then a further 6 pairs of wires, each pair going to one or two doubles.

I traced all the routes when we first moved in, and the socket is defiantly on the ring.

So I'm good for a 4mm² spur then?

EFLImpudence · 1 May 2020

roganty said:
I have an interesting setup under the floor for the wiring. It a box with downstairs and upstairs sockets and downstairs lights (Octopus wiring? - The name of the company is on the lid I'll update when I lift the floorboards)
Downstairs: two wires in/out to the CU. Then a further 6 pairs of wires, each pair going to one or two doubles.
I traced all the routes when we first moved in, and the socket is defiantly on the ring.

I don't really follow all of that. Picture of box?

So I'm good for a 4mm² spur then?

Assuming that the existing wiring is correct, then Yes.

AndyPRK · 1 May 2020

Is octopus for lights ?

roganty · 1 May 2020

EFLImpudence said:
I don't really follow all of that. Picture of box?

AndyPRK said:
Is octopus for lights ?

I'll get a picture tomorrow when I lift the floorboards

EFLImpudence said:
Assuming that the existing wiring is correct, then Yes.

roganty · 4 May 2020

A couple of days late, but here's the pictures of the junction box under the floors. Sorry about the picture quality, there's not much light down there lol!

And here it is with the cover off

I colour coded the cables with cable ties. Yellow is downstairs lights. Then there is black and red which is downstairs sockets and upstairs sockets (but I can't remember which!)

The brown and blue cables are new additions, all but one of the new cables are to the light fittings.
One new 2.5mm² cable (top middle [black cable tie]) rewires a spur on a spur into the ring.

Edit: Those wires for the lighting need brown tape to show that the neutrals are actually switched lives.

winston1 · 4 May 2020

roganty said:
Edit: Those wires for the lighting need brown tape to show that the neutrals are switched lives.

They are NOT neutrals if they are switched lives. You can't name a wire by its colour.

roganty · 4 May 2020

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

Extend ring final or....

Similar threads