Hi, If you halve both voltage and current is that not 0.25 the original resistance?
Regards Tim 6239 desk A1N21 P Please consider the environment before printing this email. From: [email protected] [mailto:[email protected]] On Behalf Of Richard Nute Sent: Wednesday, December 12, 2007 5:27 PM To: [email protected] Cc: [email protected] Subject: RE: stray voltage ??? *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. Hi Gary: You said: "0.199 V and 0.693 mA correspond to an impedance of about 300 ohms. For the human body we often use about 1,500 ohm as a model. So I wonder if the cows' problem stems from the fact they are relatively good electrical conductors." Consider that the cow has four wet connections to the earth. And a fifth connection when eating wet grass. And a sixth connection when... For wet and medical conditions, the human body resistance is taken at 750 and 500 ohms, respectively. (For wet conditions, we halve the voltage and the current, which is more-or-less the same as halving the body resistance.) A big animal should have smaller resistance than a human. So, yes, the cow is a relatively good electrical conductor. Best wishes for the holiday season, Rich - 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 [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc SELEX Sensors and Airborne Systems Limited Registered Office: Sigma House, Christopher Martin Road, Basildon, Essex SS14 3EL A company registered in England & Wales. Company no. 02426132 ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** - 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 [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
