I read in !emc-pstc that Rich Nute <[email protected]> wrote (in <[email protected]>) about 'Origin of power symbols 0 and 1?' on Tue, 8 Oct 2002: >I am looking for the origin of the power symbols >0 (off) and 1 (on). > >The earliest standards that I have are CEE 10 >and similar where the standard specifies something >like: > > "Where a rotary switch is used for power, > the 0 position shall be off and the 1 and > higher position shall be on." > >Do you have the specific wording? Do you have >something earlier than the CEE standards?
They may have been invented by the CEE committee. They are not in early editions of BS 415. I don't recall anything in early Scandinavian standards, but that is a possibility. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
