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Extend new circuit from outhouse into another property with an existing supply, which is bad idea or not allowed?

Former Community Member
Former Community Member
So there is a wooden outhouse with a consumer unit of its own with RCBOs in it that gets it supply from Building A using a 10mm SWA. Building A has a 3 phase 100A power supply. 


Building B needs a new socket for some domestic appliances but has no sockets that can handle the demand in the room where it is required (dishwasher and washing machine).


Due to layout of land and location of consumer unit location for Build B (which has its own single phase existing electricity supply)  it is easier to run a SWA from the consumer unit of the wooden outhouse into Building A. So Building B is using electricity supply of Building A through the consumer unit of wooden outhouse. 


I know there are some concerns about earth bonding potential differences but what options do I have? Can I just get electricity supply from the outhouse to Building B and extend and use the earth of sockets already in Building B? 


Is something I am doing here not allowed?
Parents
  • Former Community Member
    0 Former Community Member
    Alcomax:

    At first I thought this was  DIYr seeking advice

    ​​​​for there own home.

    Obviously not. If you were to adopt your economical method, it would be near nigh impossible to justify it " officially". If you showed this for an "assessment" for a scheme, perhaps, I would like a front row seat and a bag of popcorn please.


    So the house is just 60amp single phase and seems to be a lot going on.


    You have 3 phase elsewhere.  


    Can you not ditch the 60 amp house supply and run new supply direct from 3 phase to suit the needs of the house?


    I am not an electric professional but this is my father's house I am seeking advise for. We will be hiring an NICEIC electric company to do our work but I am helping explore options to formalise our ask.


    The distribution box for the 3 phase supply is across a rear garden, carport and a driveway. There is a huge TPO protected tree in between and we would need to rip out a lot of the existing structures to run a direct supply.


    The other option is to disconnect the power supply for outhouse, extend the SWA using a resin joint and move the consumer unit to the room in Building B we are talking about now then link all existing circuits to the new DB.


    Massive PITA and the outhouse is only supplied by a 10mm2 5 core SWA :/


Reply
  • Former Community Member
    0 Former Community Member
    Alcomax:

    At first I thought this was  DIYr seeking advice

    ​​​​for there own home.

    Obviously not. If you were to adopt your economical method, it would be near nigh impossible to justify it " officially". If you showed this for an "assessment" for a scheme, perhaps, I would like a front row seat and a bag of popcorn please.


    So the house is just 60amp single phase and seems to be a lot going on.


    You have 3 phase elsewhere.  


    Can you not ditch the 60 amp house supply and run new supply direct from 3 phase to suit the needs of the house?


    I am not an electric professional but this is my father's house I am seeking advise for. We will be hiring an NICEIC electric company to do our work but I am helping explore options to formalise our ask.


    The distribution box for the 3 phase supply is across a rear garden, carport and a driveway. There is a huge TPO protected tree in between and we would need to rip out a lot of the existing structures to run a direct supply.


    The other option is to disconnect the power supply for outhouse, extend the SWA using a resin joint and move the consumer unit to the room in Building B we are talking about now then link all existing circuits to the new DB.


    Massive PITA and the outhouse is only supplied by a 10mm2 5 core SWA :/


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