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https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl DIY Forum >> Electrical Questions >> Back to Back Single Brick Wall Sockets https://www.askthetrades.co.uk/cgi-bin/yabb/YaBB.pl?num=1600959313 Message started by ianmgsmith on Sep 24^th, 2020, 3:55pm

Title: Back to Back Single Brick Wall Sockets
Post by ianmgsmith on Sep 24^th, 2020, 3:55pm

Hi All,

I am a d.i.y.er seeking your kind advice/guidance adding a 13A double socket in a single-brick wall, opposite to ("back to back" with) an existing 13A double wall socket on the other side.

The existing circuit is a 2.5 mm2 radial on a 16A RCB supporting two 13A double sockets, to which I am adding a third on the end.

My question is, do the regulations require a steel (or other) conduit pipe between the backs of the two metal back-boxes, or is it permitted to simply run the cable through grommeted punch-holes and through the 14mm drilled hole?

I'm using sheathed 2.5 mm2 twin + earth cable, an off-cut from the same circuit which was left over by the Electrician who rewired the house.

Attaching pic of the 14mm hole.

Many thanks, ian

Title: Re: Back to Back Single Brick Wall Sockets
Post by Lectrician on Sep 25^th, 2020, 6:56am

Cable straight through is absolutely fine.

It is more common to drill the hole through at an angle so your boxes are not exactly back to back, as single skin walls, especially brick, can end up with almost nothing left behind the boxes.

Title: Re: Back to Back Single Brick Wall Sockets
Post by ianmgsmith on Sep 25^th, 2020, 1:15pm

Many thanks Lectrician, will remember to offset boxes next time. Take care, ian