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Ring Main Joint Box

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.
Parents

  • mapj1:

    That example is ugly but regs wise OK - after all the terminals are enclosed, the only wiring out of the direct route is surface visible, and it is readily accessible, so does not need to be maintenance free.




    134.1.1? The screw terminals should not be taking the weight of the JB, even if it is only a couple of oz.


    Did you notice the reason for the JB? ?

Reply

  • mapj1:

    That example is ugly but regs wise OK - after all the terminals are enclosed, the only wiring out of the direct route is surface visible, and it is readily accessible, so does not need to be maintenance free.




    134.1.1? The screw terminals should not be taking the weight of the JB, even if it is only a couple of oz.


    Did you notice the reason for the JB? ?

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