How much power do I need?
wrightyson – it’s a barn conversion, bit more than just a renovation!
The current property owner is actually responsible for installing the power so cost isn’t really an issue (for me!) just need to spec how big it is.
More or less than 12kW (~52A) seems to be important to the planning people.
In France BTW.Posted 5 years ago
Need to spec the electricity supply for a house I’m renovating. Really don’t know how much to go for. Can anyone suggest a figure for a typical 3-bedroom house or a good source of further info?
Likely to have electric water-heating and maybe electric under-floor space heating (if not, then hot water underfloor with electric water-heating).Posted 5 years ago
Aaaahh!!. Well I’ve just done 5 houses and each one has a 100amp supply. I would suggest you need that as a minimum but the loadings of electric water heaters can be high. If you then have several of these plus say electric hob and electric showers etc you may need a bit more juice!! I suggest you really need to spec you’re estimated maximum loadings now, then base it on that. Chances are all these different things wouldn’t be used at the same time but I’d suggest a little more than required power wise is the better option.Posted 5 years agodr_adamsMember
Well…Posted 5 years ago
in the uk the standard now is 100amp but there are a lot of older properties with 60amp main fuse from days gone by… that haven’t got problems. There is no difference in the supply but just what safety rating they have, i would say 52A would be too low for a barn conversion given there is maybe a bigger demand for electricity but it would also depend on if you have gas heating and cooker. Also once its in it might limit future development?
Bear – no mains gas here. Will be using wood-burner to help heat water and to provide space heating, plus possibility of installing a GSHP in the future.
Had a good browse through the Electricité de France site and there is a massive jump in the standing charges for a supply bigger than 18kW (~80A) so I think that’s what we’ll go with.Posted 5 years agobenwMember
12kw is loads, i don’t think they use electric showers in france do they? it will either come off your combi boiler or direct from your water heater which will be somewhere between 1400 and 1700 watts. the only thing would be the electric underfloor heating if you go with it that could use a bit so i would ask a local electrician for what that would use under normal conditions.modern installations are well divided in france and the chances of you using 12kw in one go are very slim.here in italy between 3kw and 6kw is what you are given after that its three phase and the price goes through the roof.Posted 5 years ago
Where are you guys getting 100A supplies? ‘Cos we’re only putting 60 or 80A fuses in the cut-outs at Northern Powergrid* – unless someone’s not doing what they’re meant to.
As I recall a 100A cut-out is standard, but it comes with an 80A fuse. We only do 100A single phase LV for Network Rail.
Still, you’ll get up to 250V from us so say 15kVA – which is loads until you want a heat pump and an EV.
*Yorkshire and the Northeast, YEDL & NEDL, YEB and NEEB if that helps.Posted 5 years ago
Fair enough – I’d call that an 80A supply, because that’s what it will actually supply. The cut-out is 100A and the cable is probably more still; but that’s good because you’d like the fuse to blow before the assets overload.Posted 5 years ago
Until recently we were putting in 60A fuses still.
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