There seem to be arguments for using a lock washer, particularly a star washer, between a ring lug and a chassis connection point since it could improve (lessen) the impedance of the circuit by breaking through surface oxides and corrosion.
There are arguments against using lock washers in this manner, because they often have a smaller conductive cross-section than the ring lug itself and are not otherwise rated for electrical service. Does anyone know of any electrical design standard or authoritative guidance document that squarely addresses this question? Of course, for the issue of mechanical stability, a washer can be placed on the top side of the lug, and so not participate directly in the conduction path. Lauren Crane Product Regulatory Analyst Corporate Product EHS Lead Applied Materials Inc. Austin, TX 512 272-6540 [#922 26540] - external use - Save paper and trees! Please consider the environment before printing this e-mail. - 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. 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 <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher <[email protected]> David Heald <[email protected]>
