Total kVA of the following supply.

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.

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