In message <c21d7120.52139%[email protected]>, dated Wed, 14 Mar 2007, Ken Javor <[email protected]> writes:
>I have heard that carbon composition resistors are no longer allowed to >be used in commercial products because they burn when mistreated. But in many applications they can't be mistreated enough to burn. How do you burn up a 1 megohm? And they don't burn up a spectacularly as one old design of wirewound resistor, with the element wound on a glass fibre core. An overload sufficient to fuse the wire resulted in an arc in the molten glass. Very bright bluish light; very high temperature. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk There are benefits from being irrational - just ask the square root of 2. 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 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
