In message <002e01c8d226$d56ba150$c600a8c0@PC323541548743>, dated Thu, 19 Jun 2008, 'Rich Nute' <[email protected]> writes:
>Circuit-breakers probably are not operated even 100 cycles during their >lifetime. In order to meet the 60950-1 requirement to disconnect both mains poles because either may be live, a breaker is used as the main power switch, thus saving two fuses. Those breakers are used quite often. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! 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
