OK, so what *is* the correct mains voltage in the UK?
I was always taught at school that the mains was exactly 250V. But I
can't find any documents anywhere which claim that this is the case.
According to Wipikedia (which is never wrong), the original
specification was
240V +/- 6%
This was then revised to
230V +10% / -6%
and then revised again to
230V +/- 10%
which would therefore allow anything between 207V to 253V.
So does that *really* mean that all UK equipment is supposed to work
with absolutely any voltage that falls between 207V and 253V?
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