There seems to be a standard installation developing for domestic EV charge points where it is 6mm2 no matter what. I checked one installation which will have around 9v dropped on a 7Kw charger. Ok, I acknowledge that the full load current won’t be pulled at all times but it can be assumed that there will be long periods when it will. Multiply that by an ever increasing demand across the nation and we can expect to see considerable energy wastage. Perhaps, we should be setting tighter limits than 5%.
As far as I know every house in the road where I live has a looped supply, except one house as when it the houses were being built that single house had a three phase supply installed because the guy buying the house was planning to have a big lathe in his garage. Fifty odd years later that guy has died, but his widow is living in the only house in the road that can have an EV charger installed without having to have a service cable upgrade.
If half the houses need a service cable upgrade, installing a three phase supply to these homes is presumably perfectly feasible.
As far as I know every house in the road where I live has a looped supply, except one house as when it the houses were being built that single house had a three phase supply installed because the guy buying the house was planning to have a big lathe in his garage. Fifty odd years later that guy has died, but his widow is living in the only house in the road that can have an EV charger installed without having to have a service cable upgrade.
If half the houses need a service cable upgrade, installing a three phase supply to these homes is presumably perfectly feasible.
