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Ring Main Joint Box

PG
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.
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  • 0
    With simple rules for ring final circuits we know where we are. If a non fused spur can only supply a single OR a double socket then any socket with just a L and N is supplied by a spur. A non fused spur supplying two separate and distanced single sockets may appear to be on the ring at the first socket, but is not. So that is not allowed. Is it that simple? All other sockets with 2 or 3 Ls and Ns are on the ring.


    Z.
Reply
  • 0
    With simple rules for ring final circuits we know where we are. If a non fused spur can only supply a single OR a double socket then any socket with just a L and N is supplied by a spur. A non fused spur supplying two separate and distanced single sockets may appear to be on the ring at the first socket, but is not. So that is not allowed. Is it that simple? All other sockets with 2 or 3 Ls and Ns are on the ring.


    Z.
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