Brian, In my experience, electrical inspectors do not like to see twist-on wire connectors used in equipment due to the perceived potential for them to vibrate loose, usually because they were incorrectly installed in the first place. Some inspectors will insist that they be over-wrapped with approved electrical tape with enough layers to match the insulation thickness of the connected wires. Some just won't accept them at all.
For equipment applications, it is up to the reviewing engineers looking at the product during the certification evaluations to determine if the connector is a) suitable for the application and b) approved for the application. This is why they are frequently found inside equipment, but why they are not generally accepted on field-installed equipment (control panels and the like). I believe that Scott Barrows is correct in his comment that they are not redundant, captive devices and thus not acceptable in the EU. As far as I know, these connectors were originally intended for use in building wiring applications on fixed wiring installations, not for applications subject too vibration and shock in normal use. -- Doug Nix, A.Sc.T. IEEE PSES Toronto Section, Ontario, Canada d...@ieee.org mobile (519) 729-5704 fax (519) 653-1318 Find me LinkedIn at http://www.linkedin.com/in/dougnix On Nov 17, 2008, at 9:17, Kunde, Brian wrote: Greetings Experts. This should be an easy one for those who know the answer. What is the deal with Wire Nuts? Where can be they be used, where can’t they be used? Are there different rules for permanently mounted equipment verse portable equipment? Do you have to also use a mechanical device such are a tie wrap? How about black tape? Our company does not use wire nuts but we always had the impression that safety inspectors do not like to see wire nuts in portable equipment. We are evaluating a product made by another company that uses wire nuts on primary wiring with black tape wrapped around it. Is this technique acceptable internationally on portable equipment? Thanks to all in advance for the education. The Other Brian _________________________ LECO Corporation Notice: This communication may contain confidential information intended for the named recipient(s) only. If you received this by mistake, please destroy it and notify us of the error. Thank you. - ---------------------------------------------------------------- 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 emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html <http://www.ieee-pses.org/li strules.html> For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- 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 emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- 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 emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommuniti es.org/emc-pstc <http://www.ieeecommunities.org/emc-pstc> - 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 emc-p...@ieee.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...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: dhe...@gmail.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
