After pulling this out of a piece of equipment, I have serious doubts about the long term use of wire nuts.
http://s139.photobucket.com/albums/q296/user8888/?action=view¤t=2012-10-08185745.jpg David Schaefer Senior EMC Engineer TÜV SÜD America Inc Office: 651 638 0251 Cell: 612 578 6038 Fax: 651 638 0285 -----Original Message----- From: Doug Powell [mailto:doug...@gmail.com] Sent: Monday, October 08, 2012 10:45 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] What's the deal with Wire Nuts? At the risk of redundancy, I would like to re-open a question from 2008 "What's the deal with Wire Nuts?" http://www.mail-archive.com/emc-pstc@listserv.ieee.org/msg56599.html The original discussion seems to track well with my own opinion on the use of these wiring devices, but this is based my opinion. I am aware of many American appliance manufacturers who use these devices and still obtain their safety certifications. It is my *opinion* that any equipment destined for the European market should not use these devices but I cannot find any direct prohibition on their use. The IPC 620 standard may have limits but this is more like a workmanship standard. Several reasons might be used to prohibit their use: 1) Temperature ratings 2) Secondary securement of conductors 3) Insufficient coverage of bare metal parts and resulting electrical tape used (creepage problem) 4) No limit to the number of conductors 5) Over/Under twisting of the connector 6) Metallic insert or non-metallic This time around my context is equipment that falls under the scope of IEC 61010-1 and its derivatives. Has anyone seen a definitive answer to this question? -- Thanks, -doug Douglas E Powell doug...@gmail.com http://www.linkedin.com/in/dougp01 - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <emc-p...@ieee.org> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ 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 <emcp...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
