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Help wanted to read/understand an electrical supply plan from DNO - updated new query

EDIT: I have one further query: WPD say that if they were upgrading the local network they would overlay the current 95mm wcon cable with a 185mm wcon cable, but that this alone would not be sufficient to allow for my property to be connected to the local network. Instead, they said that for me to be connected, a 300mm wcon cable needs to be laid, and they want me to fund the difference between the 185 cable and the 300 cable. 


As they were less than scrupulously transparent in their previous quote, I would like to check if anybody has any thoughts on the veracity of this? Why would upgrading to a 185mm cable not allow sufficient capacity to add my supply?




Original question (already answered):Can anybody assist me in understanding what an existing plan provided by my DNO is showing, and what this means for my request for a new supply please? I've had a very large quote to connect our new house (a passive house) to the network, and am not certain that it is quite right. It appears to be asking us to upgrade the local supply from a 95mm2 cable to a 300mm2 cable, and I am being asked to pay 70% of the cost of that. I was told that if this isn't done, the lights would go out for the rest of the street. I'm not an electrical engineer, so am looking for knowledge with which to go back and discuss the quote. Thanks!



Plan of existing supply.pdf


Plan of proposed new supply.pdf
Parents
  • Former Community Member
    0 Former Community Member
    Thirdly, If you took the latter approach the laying of the new cable to the substation would be contestable works and you could find alternative contractor to quote for this which might save money too.


    I support first and second but I'd advise against trying to engage other than WPD to undertake the contestable works as I doubt if they would be able to be any cheaper, plus you'd end up trying to coordinate the two parties where dealing with just one can be difficult at times. I'm fairly sure there are additional overseeing/approval costs imposed if you "shop elsewhere", Although, I've got to say, I've always had a good relationship with WPD in particular.


    As to messages, I'm not very good but I think you'll need to explore the bell symbol at the top right of the page.


    Regards


    BOD
Reply
  • Former Community Member
    0 Former Community Member
    Thirdly, If you took the latter approach the laying of the new cable to the substation would be contestable works and you could find alternative contractor to quote for this which might save money too.


    I support first and second but I'd advise against trying to engage other than WPD to undertake the contestable works as I doubt if they would be able to be any cheaper, plus you'd end up trying to coordinate the two parties where dealing with just one can be difficult at times. I'm fairly sure there are additional overseeing/approval costs imposed if you "shop elsewhere", Although, I've got to say, I've always had a good relationship with WPD in particular.


    As to messages, I'm not very good but I think you'll need to explore the bell symbol at the top right of the page.


    Regards


    BOD
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