One clear piece of evidence is that safety standards committees always specify much larger creepage and clearance distances for externaly supplied hazardous voltages than for those generated within a product. A good example are the two sets of tables in IEC or EN 60 950. This is to accomodate high voltage spikes and lightning induced voltages etc. Bill Ellingford
-----Original Message----- From: George Stults [mailto:[email protected]] Sent: 14 March 2002 17:17 To: [email protected] Subject: Voltage Spikes on Power Lines etc Hi Folks, I am trying right now to convince some folks that power line voltage spike problems can be and usually are severe enough to degrade or kill ITE products that don't have adequate over-voltage protection. I found a link using Google that describes the problems [ http://www.kalglo.com/powrline.htm ] but I'm looking for additional links to specifics or summaries if any one knows of such. Thanks in advance. George S. ------------------------------------------- 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" * ------------------------------------------- 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"
