Why do EVs not use the full 3.12kW from a mains socket?

It trips when there is no current path to ground and no hazard. I define that as a false trip. I'd guess that the speed controller in the blender makes high frequency crud that fools the GFD.

If there is a break in the ring, the economical skinny wire will fry.

I thought redundancy/safety was a selling point of the ring. That requires fat wire.

We don't run a cable to each socket! One breaker feeds a bunch of loads. I don 't have a hundred circuit breakers.

in theory. Folk that have tested them are not impressed.

it doesn't, it's fine. It simply has less margin.

it is

too vague

still uses more cable & more breakers. Lots of houses here have 2 socket circuits, and it's no problem. New installs now get more than that.

- in most cases not required

I don't think I've ever seen a ring that drops 11%! If a circuit covered such a large area one would fit more than 1.

Re rings generally, I do notice that foreginers of all sorts seem to have a lot of confustion over rings, so do many brits. Despite their advantages the UK is afaik the only place that uses them.

To get a sizeable Vdrop increase you'd need 3 things.

1. A wiring fault.
2. An overly large circuit
3. Very heavy loading just on one end of the ring.

Ultimately if you did all this, it would be way safer than a radial with the same fault

didn't know that