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Shed Supply From Ring Main

PG
A small (7ftx5ft) shed is to be located at the rear of a house. There will be a 2ft gap between the shed and the rear of the house.
The shed is to be used as a utility room, initially, with a tumble drier and freezer It will also have a frost protection heater and lighting.  If we allow a bit of power for future or garden tool use then there could be a max demand of about 18A. There are no other services planned (no water, gas or drainage). The 230V supply is TN-C-S
The house has a lightly loaded RFC on the inside wall by the shed and the proposal is to break into the RFC and loop the RFC through the shed. The RFC is supplied from a Consumer Unit that is located near the front of the house..
Not exactly a standard arrangement, probably wouldn’t even consider it if the shed was a few more yards down the garden but I haven’t managed to locate a statement in the Wiring Regs that precludes this approach. I wouldn’t have thought twice about extending an RFC through a conservatory.
 I wondered if the Forum thought that 465.1 (Emergency Switching) could come into force, say for isolating the shed in the case of a fire but I suppose that the shed isn’t too different from another room?

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  • 0
    PG:

    Cables (2 x 2.5 T&E) out of the back of the indoor twin 35mm deep socket box, through the wall, into a plastic conduit box and 25mm pvc conduit dropped 18" underground to shed position.


    Concerning the socket box: is the intention to joint one leg of the ring in there, or go back to the previous socket in the ring?


    Is PVC conduit suitable for use as an underground duct? How will water be excluded?


    I do not have any problem whatsoever electrically with extending the ring, and Mike's upside-down lollipop is just as good; but what troubles me a little is whether there will be adequate protection from external influences.


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  • 0
    PG:

    Cables (2 x 2.5 T&E) out of the back of the indoor twin 35mm deep socket box, through the wall, into a plastic conduit box and 25mm pvc conduit dropped 18" underground to shed position.


    Concerning the socket box: is the intention to joint one leg of the ring in there, or go back to the previous socket in the ring?


    Is PVC conduit suitable for use as an underground duct? How will water be excluded?


    I do not have any problem whatsoever electrically with extending the ring, and Mike's upside-down lollipop is just as good; but what troubles me a little is whether there will be adequate protection from external influences.


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