Adding sockets to this diagram?

[SJRSJR]

We want to add a couple of new sockets in our living room (marked A and B on the diagram) and have looked under the floorboards. Attached is a sketch of the layout. Would it be case of running two cables from two junction boxes to A and B, alternatively from one JB to A and then create a spur to B?

I'm assuming this is the first section of the ring? I won't be doing the work myself but like to understand how it works. Hope the photo isn't too blurry. Thanks.

View media item 76238

 

[bernardgreen]

Those junction boxes need to be removed and new cables run from socket to socket.

It will only be a bit more work to do that and make the installation more reliable ( and safer )

Terminals in junction boxes and sockets can loosen and create hot spots when current flows through the loose joint. Overheating terminals in sockets can be detected ( smell and scorching etc etc ) but overheating junction boxes under floor boards cannot be so easily discovered.

 

[SJRSJR]

Thanks. Unfortunately the cable to sockets 1 and 2 are plastered in. Socket 3 can be sorted. What else could be done to make it safer without hacking away the plaster?

 

[Taylortwocities]

Junction boxes with screwed terminals must be accessible. Over time teh screws can loosen, causing hot spots, failure and fire.

You can't make it safer without having to do some remedial work. Sorry.

 

[xr4x4]

What are the sockets fused at?