Pat Naughtin wrote in USMA 21044: >>> The watt hour is allowed only for electricity. > >I also understood this to be true - and then this is not necessarily true >for all nations. Joe may be right when he says 'The watt hour is a non-SI >unit accepted for use with the International System', but this would only be >true in individual nations that have legislated accordingly. For watt hour >to be 'allowed' it requires specific legislation in each nation; the blanket >rule that a nation uses the International System of units does not >specifically provide for non-SI variations such as the watt hour. > >Personally, I have never seen the watt hour or the kilowatt hour used in any >context except electricity (and I hope I never do).
Again, I say nonsense. In most countries, including the USA, electric energy is sold by the kilowatt-hour. Hence it must be a legal unit. Joseph B.Reid 17 Glebe Road West Toronto M5P 1C8 Tel. 416 486-6071
