I read in !emc-pstc that Jon Griver <[email protected]> wrote (in <3EFEAC1E.19777.64DE86@localhost>) about 'Czech medical grounding?' on Sun, 29 Jun 2003:
>Theoretically, it could also be necessary for battery powered equipment >connected via a >communication line to equipment in another room. If the patient were to >accidently touch the metal >enclosure, a current loop could be closed, if the connection caused the >enclosure to be earthed at >a potential different from that of other equipment to which the patient may be >connected. This is more than 'theoretical'. The hazard presented by introducing a 'remote earth/ground' into an area is not documented in any standards or guides, AFAIK, and is thus not widely recognized. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
