Greetings Listers,
I was looking at EN60204-1, Clause 14.1.1, ‘All connections…shall be secured against accidental loosening.’, and came to wonder if there are any published scientific studies on the causes of loosening, in particular of screwed terminals. It occurred to me that throughout my career I have seen plenty of terminals that have backed off. Some expensive terminal blocks failed and some that were cheap ones, worked. I have heard a number of theories, some even plausible, but have never seen a good, solid, written, technical explanation as to why it is possible for clamping force to change. Can anyone out there help me with an answer to this question? Regards, Alan Brewster, MIET Staff Engineer, Product Safety and Environmental Department Novellus Systems, Inc. ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- 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
