Joining a cable to be buried in a wall | Page 4 | on ElectriciansForums

Discuss Joining a cable to be buried in a wall in the UK Electrical Forum area at ElectriciansForums.net

SJD

-
Mentor
Arms
Joined
Feb 10, 2012
Messages
2,287
Reaction score
2,863
Location
Braccan heal
Now and again, I need to join a cable that is buried in a wall, sometimes in a stud wall, sometimes to be plastered over. Sometimes when someone has drilled through it (last one was a kitchen fitter who should have known better), or sometimes to extend a cable e.g. to move an accessory lower on the wall. Generally I'm thinking of 2.5mm2 or 1/1.5mm2 twin & earth. And assuming a new cable can't easily be pulled through.

What jointing method do people prefer?

I've used heatshrink crimp butt connectors plus an outer covering of glue-lined heatshrink. I worry about the crimp not gripping one of the conductors tightly enough and it coming loose.

I've also used heatshrink solder connectors, again with an outer glue-line h/s covering. If the copper is not clean enough, I worry about a dry joint to one of the conductors.

And what if one cable is new solid T&E, while the other cable is stranded imperial cable?
 
GO ONTO TOOLSTATION. THINK THEY ARE 32a.

Pardon... . . ?

Just for info people.
 
I use a Milwaukee one and it works fine - 18V
Useful to know! I had wondered how long / how hot a battery gun would work for, as already have some 18V Milwaukee stuff, to decide if worth getting one at some point. Mostly I have used a mains powered gun from RS (donkey's years old) as generally not needed on-site.
 
one of these with heat shrink over.
View attachment 58308
Surprising how these have now become acceptable, when I first posted about them, there where subject to all sorts of disparaging remarks, one even that the yellow lever should have been stripped green.
[automerge]1590326642[/automerge]
What size cables are you intending to crimp Mike?

The inline crimps I have for 2.5mm are impossible to squash with a hand crimper: 2.5mm² Blue Butt Connectors - https://www.tlc-direct.co.uk/Products/CTBUTTslashB.html the above unit makes short work of it.

[ElectriciansForums.net] Joining a cable to be buried in a wall
 
Last edited:
In a scenario of cable being drilled into for example, as a last resort the cable can't be replaced, joint can't be left above wall unit etc (Wago), I've used butt connectors & heat shrink, as you've suggested. I bought some of these, but not used them yet;
View attachment 37629

They'll be some arguing against using crimp connectors on solid cables, but I've seen that disputed on another forum.

PS Lets not have any book shelf jokes :)
Big Clive on YouTube tested these recently and as I recall was not too impressed with the results. The solder does not seem to flow into the connection too well. Think they are ok for low current applications, but that’s about all.
 

Reply to Joining a cable to be buried in a wall in the UK Electrical Forum area at ElectriciansForums.net

Recommended Sponsor News

  • Article
thanks for the clarification. ( also thanks to Dan. ).
Replies
6
Views
2K
  • Article
More info on link below http://sbsc.uk.net/
    • Like
2
Replies
22
Views
9K
  • Article
Happy Friday Everyone! Subscribe for more jokes direct to your mailbox or send us your own jokes to be in with a chance of featuring, by clicking...
    • Like
2
Replies
27
Views
6K

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Back
Top