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The hidden cost of net zero

Jon Steward
https://www.thegwpf.org/content/uploads/2020/07/Travers-Net-Zero-Distribution-Grid-Replacement.pdf?utm_source=CCNet+Newsletter&utm_campaign=85fbfa3557-EMAIL_CAMPAIGN_2020_07_16_12_54_COPY_01&utm_medium=email&utm_term=0_fe4b2f45ef-85fbfa3557-36405153&mc_cid=85fbfa3557&mc_eid=1127dc9b41


If you aren't aware, worth a read through.
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    The Hager three phase boards comply with part 2, to be used in a domestic installation BS7671 requires consumer units to comply with part 3.


    It seems that the Hager boards can’t be used in a domestic property, unless Hager will confirm that they actually also comply with part 3 as well as part 2 or the designer of the installation records a non-compliance on the installation certificate.


    I am sure they may be perfectly safe in a domestic property, particularly as they are designed for higher fault currents.


    But what I am saying is that the possibility is that new build homes and those which are having a major refurbishment may well have three phase supplies installed to cope with EV charging and additional heating loads, so the manufacturers and wiring regulations committee need to address any issues there may be with selecting appropriate consumer units.


    Electricians will need to completely reconsider how they design new domestic installations and how they are adapting existing installations.


    Andy Betteridge
Reply
  • 0
    The Hager three phase boards comply with part 2, to be used in a domestic installation BS7671 requires consumer units to comply with part 3.


    It seems that the Hager boards can’t be used in a domestic property, unless Hager will confirm that they actually also comply with part 3 as well as part 2 or the designer of the installation records a non-compliance on the installation certificate.


    I am sure they may be perfectly safe in a domestic property, particularly as they are designed for higher fault currents.


    But what I am saying is that the possibility is that new build homes and those which are having a major refurbishment may well have three phase supplies installed to cope with EV charging and additional heating loads, so the manufacturers and wiring regulations committee need to address any issues there may be with selecting appropriate consumer units.


    Electricians will need to completely reconsider how they design new domestic installations and how they are adapting existing installations.


    Andy Betteridge
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