In message <9d04b979323dcd428297dda95108893e0120c...@bb-corp-ex2.corp.cubic.cub>, dated Tue, 9 Dec 2008, "Price, Edward" <[email protected]> writes:
>If I lay a BNC or SMA cable (assuming 1/4" cross section by 10 foot >exposure length) onto the working area (about 16' by 12'), the cable >occupies only 30/27,468, or only about 0.11% of the floor area. >The typical human feet cover 4" by 12" by 2, or 96 square inches. So >there are 27,468/48, or 286, places where you can step in the room. > >You would think that the odds of stepping on the cable would be 285 to >1. You might, initially, but think about this. To make the math easier, assume a square room and 289 footprints (17^2). So there are 24 footprints along a diagonal. Lay a cable along that diagonal, and all 24 footprints cover it, to a greater or lesser extent. Then there are 23 new footprints along the other diagonal, then 15 new ones along each side... So with 6 cables we have 107 footprints on them, out of 289. Admittedly, this includes 'spherical cow' type approximations, but it shows a trend. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Either we are causing global warming, in which case we may be able to stop it, or natural variation is causing it, and we probably can't stop it. You choose! 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 <[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]>
