Is it permissible to run parts of the house ring main using the cavity rather than conduit. When I had a extension done in the 1970's, which became the kitchen some of the socket wiring was done using the cavity. We are now having a kitchen makeover and when I mentioned about the cabling I was told this is allowable, Is this correct. Thanks for any advice.
I see no problem using the cavity. I've done so on many occasions but I am a little out of date with current electrical regs. Where's 'The Builder' when you need him ?
I think it's illegal to put wiring in the cavity. Common sense tells me if you were drilling a hole through to the outside wall you might hit the cable.
The post from Coloumb explains how an ultra-strict reading of the Regulations (and the requirements of the National House Building Council) make the placing of cables within a cavity wall 'undesirable' (if not actually 'illegal').
Stop squabbling guys ('cos I get fed up having to remove lots of posts) and read my link (above). You'll see there the arguments put forward as to why placing cables within a wall cavity does at least risk breaching the Regulations and a well-reasoned response to those arguments.
I have a bit of electrics knowledge from my old career. There are 2 things one being IF a drill touched a wire in a cavity it would possibly push it to the side. Yes it could nick it. If a drill hit a wire in a conduit. which I believe is plastic now it would probably cause far more damage, IF I am right about the conduit is plastic.