UK AC Mains voltage?

AreaRangeLower limit VrmsNominal VrmsUpper limit Vrms
Old UK 240V (1988)+/-6%226240254
Example 220V+/-6% (example)207220233
New EU+/-10%207230253

The new harmonised limits allowed every country to keep their wall voltages basically the same.
Cheers Galu for that chart.
I've always thought that the U.K. are still pumping out 240v.

This being the case, then a country like e.g. Spain should now have a nominal voltage of 230......
 
the only way is to measure
This.

It's not the same all over, not even in the same county. I remember 124V at home and 108V at work. I managed to "act frightened" and got home brought down to 121V. At work was a much deeper city-wide problem (floods and diggers). MEASURE. Morning noon and night.

For once, moving out into "the sticks" got me a higher grade of service. My street pole transformer seems to deliver 250.2V at least 364 days a year. The legacy lines were dropped in the 1980s. The new HT lines (all steel, BTW) were based on a growth spurt. Then the economy stalled and we have excess capacity for the load. Even the 2021 migration from cities to sticks has not strained the lines.
 
Just to put some real-world numbers to this - I just measured the mains voltage at 243V in my house in the UK. I've seen it over 250V quite often.

The whole EU standardization of mains voltages was brilliant if you ask me; create a new standard to ensure all countries use the same voltage but design it in such a way that no one actually has to change anything in practice.
 
So much confusion!

"In the UK, mains electricity is currently required by law to be delivered at 230 Volts, within a tolerance of +10% / –6%, that is, within the range 253 Volts to 216.2 Volts. The value of 230 Volts is said to be the ‘nominal voltage’ "
 
This contradicts Galu's post, but I'm quite sure it was 240 V +/- 10 % in the UK and Ireland and 220 V +/- 10 % in most other European countries and was changed into 230 V +10 %/-6 % in the UK and Ireland and 230 V +6 %/-10 % in most other European countries.
 
34C28651-F9F0-4CD6-B316-1986536A0F90.jpeg


Just now.. bit lower than normal, i suspect all the CH pumps running given it’s -6degC outside.
 
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This contradicts Galu's post, but I'm quite sure it was 240 V +/- 10 % in the UK and Ireland and 220 V +/- 10 % in most other European countries and was changed into 230 V +10 %/-6 % in the UK and Ireland and 230 V +6 %/-10 % in most other European countries.
Was the EU regulation actually put into place or was it just a document signed & ignored?
I have 240