Total kVA of the following supply.

More than that incomer below can withstand for anything more than a very short duration I suspect. (so what is the size and cable type of that? best to know to avoid a fire)

Just because each phase is split in to 3 fuse holders does not mean that all three on each phase can be fully loaded at the same time !!

Where is the supply to this box coming from and where is the metering ? - the rating at the meters may well be less than either.

Mike.

Thanks for the reply,

Ha! I knew this was a can of worms.

The supply cable comes directly from the street via a basement.

Metering is directly from the meter tails in the image, some single phase meters and a 3 phase meter.

(I have photos but cant seem to insert them in this reply?)

Simon.

This image shows the meters coming from the supply.

To answer your original question:

80 x 230 x 9 = 165600 VA = 166 KVA.

BUT, as others have said, I seriously doubt that supply cable is good for that power long term.

Thank you.

Indeed, the supply cable is problematic.

For those wondering about why the regs require a single point of isolation, that second photo would make a good training aid. It would be very easy to isolate the wrong  thing in a set up like that...

It is not even that clear which meter is supplying which consumer unit, I count 1 three phase meter (the 3 red tails) and 5 single phase ones, and enough meter tail and henley blocks to stock a small van. And in the bottom left those 2 grey boxes supplying some chunky sub mains.

Pity there is no obvious 3 phase board to go with the 3 phase meter.

Is this a block of flats or small offices by any chance  ?

If so you may wish to look at the rules about Building networks for your DNO.

(UKPNs are typical, click here you need to sign up but it is open so anyone can)

The fastest way to size things up as to how much total power  is to call the DNO, or to look in more detail to get the size of  that service cable. If you can measure the diameter and tell us the cable type (lead sheathed, plastic armoured whatever ) we may be able to look it up.

Adding up the breakers/ fuses will just get a silly answer.

Mike

Thanks Mike, will get those details next time I am on site.

AdrianWint said:

To answer your original question:

80 x 230 x 9 = 165600 VA = 166 KVA.

Give or take de-rating of fuses that may be required due to temperature in the cubicle, if they were all operating at 80 A for a considerable period (e.g. all charging EV or running heat pumps, cooking etc.)