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

Morgan Phillips
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
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  • 0
    John Peckham:

    OBW


    Well spotted. Us electrical people have been saying for a long time there is not enough generating capacity now, in a very cold winter the grid gets very close to falling over with the current generating capacity. With the old Magnox nuclear stations coming off line at the end of their working lives there will be even less generating capacity. The distribution network is mostly old a creaking now, the cabling to my road is went in in 1930 and failures now from time to time. The government wants us to go all electric heating and electric cars but is deaf to the practicality in doing this. The DNOs are saying if you want this the tax payer is going to have to cough up £1 trillion which realy means £2-£3 trillion of tax payer investment in their private companies.


    If you have not had the slab cast for your new house there is something coming in the next edition of the Wiring Regulations called foundation earthing. To future proof your new house have this installed before you pour the foundations. This will enable you to become a Prosumer. I assume you will be having some PV on the roof? If so you can operate off grid, export spare energy to the grid and only take from the grid when you do not have enough supply. You need this foundation earthing to go to what is called Island Mode.


    I have summoned up the BOD so he should appear soon.


    Thank you John! We are due to start the foundations next spring, so I will definitely investigate the new regulations with respect to foundation earthing/Island Mode. Thanks for the heads up on that! And thank you for summoning BOD. I'm keen to hear what he thinks.


    I've just been reading one of WPDs glossy brochures about how they plan to accommodate all of these new LCTs. Lots of lovely pictures, but not a great deal of detail.


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  • 0
    John Peckham:

    OBW


    Well spotted. Us electrical people have been saying for a long time there is not enough generating capacity now, in a very cold winter the grid gets very close to falling over with the current generating capacity. With the old Magnox nuclear stations coming off line at the end of their working lives there will be even less generating capacity. The distribution network is mostly old a creaking now, the cabling to my road is went in in 1930 and failures now from time to time. The government wants us to go all electric heating and electric cars but is deaf to the practicality in doing this. The DNOs are saying if you want this the tax payer is going to have to cough up £1 trillion which realy means £2-£3 trillion of tax payer investment in their private companies.


    If you have not had the slab cast for your new house there is something coming in the next edition of the Wiring Regulations called foundation earthing. To future proof your new house have this installed before you pour the foundations. This will enable you to become a Prosumer. I assume you will be having some PV on the roof? If so you can operate off grid, export spare energy to the grid and only take from the grid when you do not have enough supply. You need this foundation earthing to go to what is called Island Mode.


    I have summoned up the BOD so he should appear soon.


    Thank you John! We are due to start the foundations next spring, so I will definitely investigate the new regulations with respect to foundation earthing/Island Mode. Thanks for the heads up on that! And thank you for summoning BOD. I'm keen to hear what he thinks.


    I've just been reading one of WPDs glossy brochures about how they plan to accommodate all of these new LCTs. Lots of lovely pictures, but not a great deal of detail.


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