So I was right. You don't understand this simple principle.
That is essentially what "nominal" means (not necessarily an indicator of the actual figure).... the so called nominal voltage as stated in the UK is a made up figure and not nominal at all.
That is essentially what "nominal" means (not necessarily an indicator of the actual figure).... the so called nominal voltage as stated in the UK is a made up figure and not nominal at all.
You seem to think that "nominal" means 'average', 'common', 'usual' or something like that - but it doesn't.
Kind Regards, John
I'm sure someone has told you that before.From Wikipedia:
"In measurement, a nominal value is often a value existing in name only"
Because that is its purpose.The so called nominal value does not exist. So why do so many calculate using a value that does not exist?
No, because all the comparisons and parameters have be calculated with the same value.How much more intelligent and safer it would be to use the average value that actually exists.
Exactly - as I said, that's what "nominal" means. I can understand your being unhappy with this concept of an (essentially 'arbitrary') nominal voltage. Given the wide range of permitted supply voltages, it might be better (and certainly totally honest, and non-contentious) to simply quote, and talk about, that permitted range - i.e. 216.2V - 253V in the UK.From Wikipedia: "In measurement, a nominal value is often a value existing in name only" ... Which says it all really.
That was, of course, my implicationIt would be simpler to round that figure to the nearest ten for ease of calculations. Oh wait...
JohnW2";p="3362071 said:What figure would you then use for your calculations - maybe 234.6V (the average of 216.2V and 253V), perhaps?
Kind Regards, John
240v. Not the average of the permitted range, but the figure that has been the stated voltage for years and the suppliers have said they have no intension of changing.
I'm not sure about this 'stating'. I think you would be very hard pressed to find any supplier today prepared to 'state' that they were "supplying 240V", or were going to "continue to supply 240V".240v. Not the average of the permitted range, but the figure that has been the stated voltage for years and the suppliers have said they have no intension of changing.
I can't.I can understand your being unhappy with this concept of an (essentially 'arbitrary') nominal voltage.
where is your current thermostat? isn't it an option to just swap it out with the new one?
if not, can you be creative? use the white back panel and have it up against a door frame, then run the thin USB wire down the edge of the door frame?
just an idea...
The US uses 120v (+or - 5%) not 110v.
A transformer ( the magnetic type with coils ) will take any voltage at the input up to a maximum set by the quality of the insulation. The output voltage will be set by the turns ratio and vary with the input voltage.But don't (some) transformers use a range of 110-240?
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