I am intending relocating a double power socket and will be extending the wiring. What is the best connector for the job. Once the aperture where the old socket was is filled in, the connection will be hidden. Blair
If you run the wiring from the previous and next points in the ring to the newly located sockets, no - you can plaster over the hole. The new wires would, of course, have to meet the rules for depth behind the surface, location, etc.
If you put a junction box in, then the wiring within it should be accessible, eg blanking plate. This may also be a good idea from the point of meeting the cable location rules.
In practice, if you are absolutely certain that *your* join would neveer need attention (eg that there was no possibility of corrosion, or screws working loose over many years, etc and that the rules regarding cable placement were still being met, etc) then plaster over it..who would ever know?
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