Joining (Eventually) Inaccessible 240V Electrical Cables.

[flobadob]

I'm moving an electrical socket and the old socket will eventually have a radiator placed in front of it. I'm planning on fitting a blank plate over the old socket and joining and extending the two 2.5mm electrical cables to the new socket location.

I've used connector blocks many times previously with no issue whatsover. However, because these joints will eventually be virtually inaccessble, I want to be 100% sure that the 6 joints will be secure for evermore amen.

Will connector blocks be fine, or should I think about a different method, that will make for more secure and permanent joints? 

[douglas9401]

Yellow in-line crimp connectors might be better.

[netherfield]

These days I'd use Wago connectors. 

[youngmafbog]

Wago connectors.  You are permittted to "hide" them.

Do not use any screw connectors, the expansion of the cable thought heat of being used gradually loosens them.

Alternatively Douglas' method works but you do need a proper crimping tool.  Mine was quite expensive but needed by ELECSA/ NICEIC.

[youngmafbog]

You should also perform some tests at the distribution board before switching on to ensure you have connected properly and the resistance is not too great.

[Old_Geezer]

You may find it better to use the existing cable to pull through a new one thus avoiding any join.

[davebro3]

Can you not connect the new cable directly into the old socket? That's what I've done.

[fbg40]

I am not an electrician just a reasonable DiYer so here is my suggestion : Replace the existing socket with a switched fused spur. Use the existing cable as the supply to the fused spur and then add your new socket using the line out from the spur. I've done this and had it checked by a qualified sparky and he said it was fine. Hope this helps.

FBG40

[flobadob]

Because I won't be able to access it afterwards then I wouldn't want to have a fuse in there that could possibly blow. And there's no way to pull new cable through directly from the fuse box. 

So I think the Wago connectors sound like the best idea, thanks, I will Google them to see what they are and their specs.

[davebro3]

seems (to me) like a solution looking for a problem!