I read in !emc-pstc that Allen, John <[email protected]> wrote (in <[email protected] k>) about 'South Korean Power System & Schuko Plugs', on Thu, 21 Feb 2002: >Double-pole fusing requirements may depend on the product standard >requirements, but is effectively required where the internal wiring of the >equipment cannot deal with the full prospective fault current available from >the wall socket.
In 230 V systems, the prospective short-circuit current through a wall socket may be at least as high as 500 A (but not for long, of course). This can cause costly damage other than through heating, e.g. through electromagnetic forces. For the cost of a second fuse and holder, it seems sensible to eliminate this, albeit not very probable, hazard. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk After swimming across the Hellespont, I felt like a Hero. 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"
