In article <[email protected]. com>, Leber Jody-G19980 <[email protected]> writes >I have a question concerning fuses evaluated to IEC 60127. Why is the >limit for fuses 6.3 A?
As far as I know, that was the highest current rating that could be made in 20 x 5 mm size when the first edition of IEC 60127 was prepared. But it may also be related to the 6 A fusing of branch circuits in Continental Europe, insofar as there would have been no demand for higher current ratings at that time, when fuses tended not to be used in secondary circuits, even high-current ones (tube/valve heater circuits in those days). It doesn't normally present a problem, because you can get higher current ratings, even in 20 x 5 mm size now, and I don't know of a safety standard that prohibits their use. You may have to read the small print, though, to find that out. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.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/listserv/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 Mcantwell [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://www.ieeecommunities.org/emc-pstc
