Hey Gary - Based on the values presented, I ran the calculation and got very similar results. I'd say that the number you have is OK.
Best Regards Charles Grasso Compliance Engineer Echostar Communications (w) 303-706-5467 (c) 303-204-2974 (t) 3032042...@vtext.com (e) charles.gra...@echostar.com (e2) chasgra...@gmail.com -----Original Message----- From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of McInturff, Gary Sent: Monday, November 28, 2011 9:58 AM To: 'John Woodgate'; 'EMC-PSTC@LISTSERV.IEEE.ORG' Subject: RE: [PSES] Green multi conductor wire - impedance of stranded wire On a related topic. I am hoping somebody can easily double check a calculation I made for the ground wire, and it only has to be a rough measurement. It would appear the wire the designers are using is going to be too smalI for a ground bond wire. I have a 6.5 meter 26 AWG stranded wire and I'm trying to determine its inductance at 100 MHz. Assuming an inductance of 15hH/in (9.8 ohm/in) and I get roughly 2K ohm at 100 MHz along the cable. Can somebody, kindly verify that number. The 15 hH/in. is an old ballpark reference number I picked up years ago in Clayton Paul's Introduction to Electromagnetic Compatibility but I don't have access to it at the moment. I'm not worrying about the affect of the other conductors for the moment. If you have nebulous spare time and could give me a double check on the value I would appreciate it. Thanks Gary -----Original Message----- From: John Woodgate [mailto:j...@jmwa.demon.co.uk] Sent: Wednesday, November 23, 2011 11:20 AM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: Re: [PSES] Green multi conductor wire In message <3FE6A3972FF74EFB8A9B276E7DF1A3F8@RichardHPdv6>, dated Wed, 23 Nov 2011, Richard Nute <ri...@ieee.org> writes: >The USA agrees with the UK. How unexciting.(;-) No international incident to enliven the day. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK Some people who are peeling the finch of the financial crisis are thinking of biting a rook. - ---------------------------------------------------------------- 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://product-compliance.oc.ieee.org/ 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 <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://product-compliance.oc.ieee.org/ 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 <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://product-compliance.oc.ieee.org/ 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 <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>
