Containment for tails

[TJC1]

Evening all

Have a consumer unit change next week, the board is high level in a bedroom with 16mm tails buried in the wall. I’m replacing the tails but they don’t want any trunking in the bedroom, the mains is below for consumer unit I was going to trunk up the outside wall and drill in?

Any others suggestions...

 

[telectrix]

So the tails will need RCD protection then.

not if they are existing and installed prior to 17th Ed. tin hat on.

 

[SparkyChick]

Personally, I'd cut a chase and use some of this:-

Products Archive - Direct Channel

@Leesparkykent highlighted this sometime ago and it's great stuff for this kind of thing. I have tried drilling it and it's hard, not something you could drill through accidentally and I'd be very surprised if you could put a screw or nail through it without exerting forces that should tell you there is something in the wall.

 

[7029 dave]

I have been on a new site , all the 25mm tails were poking out at meter box, all run through cavity/stud. I know because it was still at 1st fix stage.
This method is still being practice'd.

 

[Dustydazzler]

tails passed straight through the cavity horizontal or even at a very slight angle happens all the time.
but fishing tails up or down the cavity using several yards isnt ideal imo

 

[Bellendian]

I'd be tempted to use SWA made off in a small adaptable box within meter box in this scenario. And if SWA more than 3m then use a switch fuse in place of adaptable box.
Seen a few new builds recently with 2 meter boxes side by side for this purpose. Metering kit in one, switch fuse in other one. UKPN must have put their foot down on other folks kit in 'their' box on those!

 

[Gavin John Hyde]

I'd be tempted to use SWA made off in a small adaptable box within meter box in this scenario. And if SWA more than 3m then use a switch fuse in place of adaptable box.
Seen a few new builds recently with 2 meter boxes side by side for this purpose. Metering kit in one, switch fuse in other one. UKPN must have put their foot down on other folks kit in 'their' box on those!

I came across one like that the other day on a new build, confused me at first as I opened it and found just a switched fuse and tails. Next to it was what i initially thought was gas but no, had main cut out,meter and isolatorin. Advantage for me was that I could put a small metal consumer unit in the one with switched fuse for the soon to be installed electric car charger. then a 1.5m cable run to the charger which will be on driveway next to the meter boxers. does have its advantages...
When I asked the sparks on the site finishing some of the remaining houses they said that the DNOs contractor had insisted on it. This was a SSE area.

 

[Dave OCD]

I think that's a very good idea, fitting a metal switchfuse with 16mm swa glanded into it within a box already housing a DNO cutout,meter and suppliers isolator can be challenging to say the least.