In message , at 10:23:20 on Fri, 22 Jan
2021, The Natural Philosopher remarked:
On 22/01/2021 08:31, Roland Perry wrote:

And once again, not on simultaneously in every house in the street.

Bless! "The wind is always blowing somewhere"

That's another diversity issue, and as you say, one that's rather
suspect.

However, given that the street wiring in much of the country is sized
for 2kW per premises, and they don't burn out very often, we can
conclude just from that evidence, that substation-premises diversity
does in fact work.

Just like the 15kW diversity in my house works (I haven't blown a main
fuse, ever) but if I added even an entry level 7.4kW EV wallbox I think
it probably would [blow the fuse]. I'm investigating getting it upgraded
to 100A as a result.
--
Roland Perry