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]

NO WAY, JOSE. options are:
1. use existing tails.
2. feed new tails up cavity.

 

[Andy78]

Exterior trunking eh ?

 

[buzzlightyear]

what's wrong with box timber in the bedroom .

 

[TJC1]

NO WAY, JOSE. options are:
1. use existing tails.
2. feed new tails up cavity.

Why so anti? Cavity drop..... really...

 

[westward10]

Do they need replacing.

 

[Dustydazzler]

What’s wrong with the existing 16mm tails...?

 

[TJC1]

What’s wrong with the existing 16mm tails...?

100a main fuse

 

[DPG]

Tails in cavity - never a fan of that.

 

[Dustydazzler]

100a main fuse

not a particularly big issue imo

 

[FatAlan]

Don’t DNO’s sometimes run supplies in up exterior walls protected by some sort of capping?

 

[MJPD29]

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...

If your going outside id be using swa or similar possibly with capping over it as it would look better than a cleated cable. Not a chance of be putting tails or trunking up the wall outside.

 

[Dave OCD]

I just wonder whether the seal fairy could be booked in to turn that 100a fuse into an 80.

And as the OP knows it's a 100a fuse it sounds like the aforementioned fairy has made a start already.

 

[Ian1981]

If the maximum demand of the installation will not exceed the ccc of the 16mm tails and they have adequate fault protection, then I’d leave them be regardless of the 100amp fuse.

 

[Vortigern]

So the tails will need RCD protection then.

 

[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:-

External Cable Protectors | Cable Wire Basket | Cable Management System

These are currently being specified by a number of national builders for new housing projects.

directchannel.uk.com

@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!