kva for a flat with all electric heating

[Thirst]

UKPN came back to me and said they could supply 23kVA by routing from another source without additional cost so am going with that.
I got a quote from them and ma now looking to find someone to do the contestable stuff. UKPN are very slow and the quote seems a lot.

Can anyone recommend a contractor that can do this kind of stuff in South London?
thanks

Hi Gus,

This thread has been very interesting. I am in a similar situation. I have a large house that is being converted to 4 x 1 bed flats for young professionals plus a landlord supply. That means 4 x dishwasher, washer/dryer, induction hob, electric oven etc. I also want the landlord supply to be enough to allow for an electric car charge point in the future. I also want to plan for the fact it's looking like gas boilers will be phased out in favor of electric within 10-15 years.

My spark came back and said each flat would have an 80Amp (AD) demand based on appliances and that 100Amp would be ideal given lighting, plugs etc So 23Kva.

5 x 23Kva = 115KVa

My next question is that Ryefield boards are designed to sit on a 100Amp supply (at least the ones I've looked at). A 115KVa supply would exceed this, no?

UK Power really need to do a dummys guide 101 on this.

Asking as a property owner/non-spark.

 

[davesparks]

Hi Gus,

This thread has been very interesting. I am in a similar situation. I have a large house that is being converted to 4 x 1 bed flats for young professionals plus a landlord supply. That means 4 x dishwasher, washer/dryer, induction hob, electric oven etc. I also want the landlord supply to be enough to allow for an electric car charge point in the future. I also want to plan for the fact it's looking like gas boilers will be phased out in favor of electric within 10-15 years.

My spark came back and said each flat would have an 80Amp (AD) demand based on appliances and that 100Amp would be ideal given lighting, plugs etc So 23Kva.

5 x 23Kva = 115KVa

My next question is that Ryefield boards are designed to sit on a 100Amp supply (at least the ones I've looked at). A 115KVa supply would exceed this, no?

UK Power really need to do a dummys guide 101 on this.

Asking as a property owner/non-spark.

Off the top of my head that seems like a very high demand for each flat.

Ryfield boards are normally designed to be supplied at a bit more than 100A, they usually have 100A rated outgoing ways.

Nobody is going to produce a dummies guide because it is a technical subject and involves well established scientific principles and calculations, without learning this and gaining experience working alongside those who are experienced at it you can't get it right.
There are too many variables and considerations to reduce it down to a simplified guide.

 

[peterinreading]

I have done several similar installations in an SSE area. In two cases I estimated that a 60 Amp supply would be adequate for each flat but SSE insisted on providing 100 Amp supplies.