I have a double socket in the inside of the front wall of my
1976 house next to the BT master socket.
I added the power socket and it is a spur from the ring main in the bedroom above but because I later applied 80mm of celotex to the inside of this wall (50 all over and taped+30 infilled between the battens surface fitted on the 50mm sheets with frame anchors), it is fed from a fused spur with a 10A fuse so that I don't have to downgrade the whole ring. The spur
2.5 cable is inside oval conduit clipped to the original wall so it is buried under 80mm of PIR.
From the window cill down I have used up some unused B&Q 18mm t&g vertically cladded from skirting up to cill. There is only the
50mm of celotex behind this and gap of about 20mm between it and the cladding.
The socket backbox is fixed to the original wall inside a cutout in the celotex with a topless and bottomless box of 15mm fermacell around it.
I have glued 4 of the 18mm t&g strips into a single panel that holds the BT master socket, the double socket and a spare backbox for CAT5/6. This section can thus be removed or hinged forward after a little bit of unscrewing which involves disconnecting the power socket.
What I want to do is joint the 2.5 t&e to a flying lead of 3-core immersion-type cable which is connected to the socket to avoid having to do this. This requires a joint between solid-core flat twin and
3-core stranded so a wago is obvious, but I only want one !.
I have a ratchet crimp so I could do it that way but I am not sure if the usual blue/red/yellow crimps are intended for this. Anyone know ?
Andrew