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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
  • Wow, this gets worse.  going from 95mm2 to 185mm2 increases capacity by at least 100A/phase  (ratings from low-voltage-aluminium-waveform-cable (elandcables.com)).  Unless you need more than 69kVA (I doubt you will get anywhere near that) then 185mm2 should be fine unless the existing cable is seriously overloaded.


    If the existing cable is that overloaded you could argue that they should be overlaying with 185mm2 anyway.   A lot will depend on the extent of the overload and how much power you need.  Further enquiries and a bit more precision on your own needs could save you some more.


    If you do end up at 300mm2 I would push to ensure that its only the cable cost and not the civils that you are paying a contribution too.  Also you only need to pay up to your service joint for the difference.  the rest of the run to the pole over the road should be down to WPD. Push them for a detailed breakdown.


    I cant read the updated plan its too blurred when I blow it up


Reply
  • Wow, this gets worse.  going from 95mm2 to 185mm2 increases capacity by at least 100A/phase  (ratings from low-voltage-aluminium-waveform-cable (elandcables.com)).  Unless you need more than 69kVA (I doubt you will get anywhere near that) then 185mm2 should be fine unless the existing cable is seriously overloaded.


    If the existing cable is that overloaded you could argue that they should be overlaying with 185mm2 anyway.   A lot will depend on the extent of the overload and how much power you need.  Further enquiries and a bit more precision on your own needs could save you some more.


    If you do end up at 300mm2 I would push to ensure that its only the cable cost and not the civils that you are paying a contribution too.  Also you only need to pay up to your service joint for the difference.  the rest of the run to the pole over the road should be down to WPD. Push them for a detailed breakdown.


    I cant read the updated plan its too blurred when I blow it up


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