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Follow up question: quote for connection and local supply issue

Thanks for the fantastic replies I had to my previous question, helping me to understand the supply locally and enabling me to successfully push back on the quote/plan provided. 


I now 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? Why would they not, if doing an upgrade and presumably incurring significant cost, simply upgrade to future proof the local supply with a 300mm2 cable?


I'm particularly concerned that what they have said about replacing the 95mm2 cable with a 185mm2 cable (that this would not be sufficient to connect me to the supply) is untrue.

Plan of existing supply.pdf
Updated plan for new supply.png
Parents
  • Sorry - missed the fact it was a new post.

    Ah, they are wiggling again..


    So if the 95mm cable is now carrying 188.5 amps  per phase (though this level of precision is like measuring a walnut with a micrometer - a different silly answer each time, I bet that is not a properly measured value -  if they had said "ooh about 150-200A depending on the day"  that would be more credible.) then they need to change it anyway.


    Adding your 15KVA supply (3 phases or 5kW  each  ( or if you  prefer, about 21 odd amps each phase)  pushes it to 219.5 amps.


    They still need to change it, and still to the same thing .

    It is probably still cheaper for you to have a feed, just for you, teed off from nearer the substation, and if that is the cheaper option, then either they give you that or fund the difference.

    They may be hoping you will just roll over at some point.

    regards,

    Mike.

Reply
  • Sorry - missed the fact it was a new post.

    Ah, they are wiggling again..


    So if the 95mm cable is now carrying 188.5 amps  per phase (though this level of precision is like measuring a walnut with a micrometer - a different silly answer each time, I bet that is not a properly measured value -  if they had said "ooh about 150-200A depending on the day"  that would be more credible.) then they need to change it anyway.


    Adding your 15KVA supply (3 phases or 5kW  each  ( or if you  prefer, about 21 odd amps each phase)  pushes it to 219.5 amps.


    They still need to change it, and still to the same thing .

    It is probably still cheaper for you to have a feed, just for you, teed off from nearer the substation, and if that is the cheaper option, then either they give you that or fund the difference.

    They may be hoping you will just roll over at some point.

    regards,

    Mike.

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