Actually I wasn't just referring to their selection of components (in itself an issue, they pretty much included the entire BOM) but the information in the list. They haven't provided any of the NRTL mark info, critical tech specs, or applicable standards the parts are certified to after repeated requests. I finally got them to provide the manufacturer names and part numbers.
-Dave -----Original Message----- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Friday, March 14, 2014 3:22 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Critical Components definitions In message <d9c1067d2cb544069485d5c3cdbf4...@bn1pr08mb059.namprd08.prod.outlook.com> , dated Fri, 14 Mar 2014, "Nyffenegger, Dave" <dave.nyffeneg...@bhemail.com> writes: >they don't seem to understand what a critical components list is. I've >given them examples and not gotten very far so I was looking for >something more official like from the standards. Standards writers cannot tell what parts a designer might use and how they might be used. A component could be critical in one circuit but not in another. Bearing in mind what a 'critical component' is (one whose failure, in any way, would compromise safety), one normally examines the schematic and, for each part, considers 'What if...?'. This enquiry must include whether further failures might occur as a consequence of one part failing. Of course, some components are always critical, some, but not all, of those in mains supply circuits. -- OOO - Own Opinions Only. With best wishes. See www.jmwa.demon.co.uk Nondum ex silvis sumus John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - ---------------------------------------------------------------- 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://www.ieee-pses.org/list.html (including how to unsubscribe) 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://www.ieee-pses.org/list.html (including how to unsubscribe) 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>
