Indeed.Whatever, these discussions about detail are a bit irrelevant. Not only does the 230V 'nominal' electricity supply voltage in the UK not correspond to the 'expected'/'intended'/'observed' voltage, but nor does it correspond to the minimum, maximum, any sort of average (mean, median, mode or whatever) or any other summary statistic of the voltages which are actually supplied.
That is why it is called nominal, and not average.
It is.Let's face it, it is surely the range of permitted voltages which actually matters.
But you seem to have a problem with a permitted voltage range being 207-253 when you won't find the supply ranging between those limits in any one location.
I always thought that 230 - 10% was 207.Would it make any difference if, rather than 230V ±10%, the 'target' figure was stated as 240V -10%/+5.5%? Both represent (approximately) 216V - 253V, and any voltage within that range would be acceptable
So what is the problem with a supply varying between 226V and 253V when the allowed range is 207-253?so what is the significance in one having a 'nominal' value of 230V and the other a nominal value of 240V?