In message , at 11:53:44 on Fri, 13
Jul 2018, John Williamson remarked:

If you check, there is a whole network of different standard voltages
starting with the 400kV supergrid, right down to the 415 Volt 3 phase
plus neutral feeder that runs under or over your street, with branches
off to give a single phase 230 Volt supply to your house or flat.

In general terms, the current at each stage is similar.

Broadly true, apart from the supergrid being 1000A, as far as I can
tell.

What's important for the EV-charging scenario is that is if several
dozen houses are supplied by an 200A street main at 230v from the local
substation, how can more than a handful charge an EV overnight at 50
amps?
--
Roland Perry