In message <[email protected]>, dated Fri, 17 Aug 2007, Scott Xe <[email protected]> writes:
>Thanks for your advice. Referring to IEC 61293, "~ 230 V" is a correct >marking. In many electronics products or electrical appliances, they >are commonly marked "230 V~" and I believed they were correct. I am >now surprisingly aware that ~ 230 V is a correct marking. Do you have >any idea why "230 V~" is considered correct for so long? Because before IEC (6)1062 (the fore-runner of IEC 61293), there was a free-for-all and people wrote whatever seemed appropriate. It's logical to progress from the general to the particular, and the nature of the supply (AC or DC) is more general than the voltage. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
