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Upgrading supply to rural property

Grumpy
I'm in the process of buying a rural property and I would really appreciate some advice on how to arrange the supplies to the various buildings.

Currently the main property has a standard single phase TNCS domestic supply. It's overhead to the boundary and then the current owner trenched it.

There is a stone outbuilding some 20m away with PV on the roof and a submain back to the house. It looks like 16mm armoured and I don't know how it's connected in the house yet.

Going forward I would like to convert the outbuilding into a 2 bed dwelling. Additionally some 10m from the main house are two former workers' cottages in some disrepair that have planning for a three bed cottage. Finally, I would like to build a small workshop about 40m from the main house.

Heating will be oil and wood. So my thinking is that the outbuilding and main house would be OK together on the existing supply rating and the cottages and workshop wouldn't need more than 60A supply each.

 So how would you go about this? For example, there is a small outhouse, I could ask for a new 3p supply to this outhouse and then run 1p sub mains to the various buildings.

Is that plausible?

Thanks for any help.

G

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  • 0
    Is the proposal for three dwellings in total, including the existing ?

    If so then I would ask for a new three phase 100 amp supply, one phase per dwelling, and three phase to the workshop.

    If four dwellings are proposed in total, then that needs careful consideration to avoid overloading the phase that serves two dwellings.

    A 100 amp three phase supply should allow for 2 or 3 7Kw EV chargers or a single 22KW EV charger.


    With a three phase supply, you can add another two PV arrays, since the limit is general y back feeding per phase, not per customer.


    Make certain that 3 phase is available ! Presuming that 11Kv lines are overhead do they two wires or three. If only two wires then you cant get three phase without paying for a network upgrade.
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  • 0
    Is the proposal for three dwellings in total, including the existing ?

    If so then I would ask for a new three phase 100 amp supply, one phase per dwelling, and three phase to the workshop.

    If four dwellings are proposed in total, then that needs careful consideration to avoid overloading the phase that serves two dwellings.

    A 100 amp three phase supply should allow for 2 or 3 7Kw EV chargers or a single 22KW EV charger.


    With a three phase supply, you can add another two PV arrays, since the limit is general y back feeding per phase, not per customer.


    Make certain that 3 phase is available ! Presuming that 11Kv lines are overhead do they two wires or three. If only two wires then you cant get three phase without paying for a network upgrade.
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