my parents bought and renovated a farmhouse in france (where they now live)
I (being a bit of an electrical geek) decided to whip the cover off the dis board to see 'how they did it' ?
I was very impressed.
They dont use ring mains, its radials for everything , 2 sockets on balcony = radial etc
makes for a lot of ways but less disruption if there is a problem on particular radial.
the wiring colours are
red - live
blue - neutral
green yellow - earth
(unsure about 3 phase as only single phase supply)
The EDF energy cut out was digital too - (no was not the meter, def the cut out fuse) and this had a digital display on it.
it was very modern and high tech in comparison to what I find domesticaly on a day to day basis.
Am not a fan of the french in general tbh.......but their new electrical installations are very good
Lloyd