Maybve I haven't been clear enough.If not, you presumably are discussing the wrong issues.![]()
I have not been discussing nominal voltage, and I have indicated that I have no real interest in it. What I have been saying, repeatedly, is that I don't see that nominal supply voltage (or average supply voltage) has (or should have) any part to play in safety-related calculations, and nor can I really see any other particularly useful purpose it serves.
Having decided, essentially arbitrarily, on a nominal supply voltage of 230V, "then nominal + 10% -6%" (aka 216.2V - 253V) is fair enough, since it provides enough information. However, in terms of safety-related calculations "216.2V - 253V" is all one needs to know, and knowledge of what the nominal value is deemed to be gives one no further information.
U0 x Cmin is, in my opinion, particularly ridiculous, since it is applying a 'correction factor' to an arbitrary number!
Any combination of U0 and appropriate +% and -% figures which ended up as "216.2V - 253V" would be equally informative in facilitating calculations, but the actual value of U0 is (or should be) totally irrelevant to the calculations - which is why it does not really interest me.
Kind Regards, John

