In article ,
harry wrote:
On Monday, 16 September 2019 10:24:52 UTC+1, Tricky Dicky wrote:
When I re-site the CU the cable to the shower will need extending this will be a temporary measure until we do the bathroom following the kitchen. Once the bathroom is done this cable will be redundant, unfortunately part of this cable will be buried in plaster. I am hoping as it goes through the loft I can pull a few metres of new cable through. If I cannot replace the cable the join will be in an inaccessible place in the loft or buried in the plaster. Can I use crimps in either of these situations and what additional insulation do I need to use eg. heatshrink, self amalgamating tape or other?

Richard

You can join cable with solder ferrules. (A tube in which cables are soldered using a blowlwmp) No crimping tool needed.
All sizes of cable can be thus joined.

If you aren't careful you melt the insulation,

--
from KT24 in Surrey, England
"I'd rather die of exhaustion than die of boredom" Thomas Carlyle