Peter Tarver and all, Yes I know that these aren't harmonised standards. My original query I guess was why independent bodies should decide upon such varying creepage distance requirements. I had naively thought that these distances would have been determined by some universally recognised formula, that would have given the same results for the same circumstances wherever in the world it was applied. It has now be made clear to me (thanks to all who helped me understand) that this wasn't the case, and that throughout the world some very different methods are used to determine appropriate creepage distances.
Perhaps one day there will be method accepted by all disciplines of product design around the world, like everyone using IEC 60664 for instance. But until that day comes I now at least have an answer for our customers when they ask about the different requirements. Thanks you all again. Best regards, David Sproul. -----Original Message----- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of Peter L. Tarver Sent: 11 October 2002 17:27 To: EMC-PSTC Subject: RE: Creepage David - These are not harmonized standards. UL 891 bases it's spacings on US electrical distribution standards, while EN60439-1 most likely relies on IEC60664. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com > -----Original Message----- > From: David Sproul > Sent: Friday, October 11, 2002 6:15 AM > > Sorry Brian, > I missed your response until now. The standards > I was using was EN 60439-1 > for Europe and UL 891 in America. These were the > standards recommended by > the customers association and UL. > > Best regards, > David Sproul. ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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" ------------------------------------------- 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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"
