A kitchen worktop twin S,O, is to be relocated horizontally by about 60cm.
The ring final cct (RFC) is cabled in buried T&E and the galv' steel back-box is flushed into the plaster/brick wall.
The RFC T&E extension cabling will be buried under plaster, covered in plastic capping along the horizontal prescribed zone. Visually, it would be reasonable for an electrician to be aware that the route may contain cable(s).
The circuit is RCD protected.
The intent is touse insulated crimp and double insulating tape the jointed cables within the existing box to achieve a maintenance free connection, A 2mm thick (fabricated) plate was to be used to cover the back box and provide additional mechanical protection. The box would then be plastered over.
The questions are:-
1. How many would consider the steel plate back box cover a desirable feature or would a simple plastic cover suffice?
2. Should the original back box be left unearthed?
Thanks in advance.