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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
    So we did an "Earth continuity test" with the earth of the "power supply from the outhouse" and the earth from "the existing supply" in the building (using the gas and water pipes in the existing building).


    It seems like the earth continuity test passed and the earth of both the power supplies (outhouse and building) is bonded with the gas and water pipes of the main house. So the electrician inffered that the earthing systems of both buildings are connected?


    It is possible that the two PME earth systems are supplied by the same cable laid on the street and possible served by the same rods (or the earth is connected at the substation which is less than 50m from thouse).


    In light of this would it be safe to run a new circuit from the outhouse to the main house?


    Thanks!
Reply
  • Former Community Member
    0 Former Community Member
    So we did an "Earth continuity test" with the earth of the "power supply from the outhouse" and the earth from "the existing supply" in the building (using the gas and water pipes in the existing building).


    It seems like the earth continuity test passed and the earth of both the power supplies (outhouse and building) is bonded with the gas and water pipes of the main house. So the electrician inffered that the earthing systems of both buildings are connected?


    It is possible that the two PME earth systems are supplied by the same cable laid on the street and possible served by the same rods (or the earth is connected at the substation which is less than 50m from thouse).


    In light of this would it be safe to run a new circuit from the outhouse to the main house?


    Thanks!
Children
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