Cables in cavity of walls

[Colin188]

Is it permitted to run twin and earth in a domestic cavity wall?

 

[Paul228]

It probably building regs that don't allow cables or pipes inside an external cavity wall.
I know plumbers ( gas n water) are supposed to sleeve a pipe that passes through an external cavity wall.
I guess it's good practice to do the same with cables.
Also, you have to seal the remainder of the hole to stop bugs crawling in and infesting your home.

 

[Wilko]

Hi Nigel, welcome to the Forum !
I won't go through the negatives, but cables in vertical voids are described in the IET OSG Appendix D item (f) on page 133.