Scott, On the 12Vdc/230Vac inverters that I use in my cars, there is an earth connection to earth the metal case of the inverter. This is connected to the car chassis and it is also connected internally to the earth/Neutral of the 3pin plug. any item that requires an earth is then referenced to the car chassis which has become the local earth for the system. If the 230Vac powered equipment is taken outside the car environment, the return path is still back to the chassis via the conductivity of the soil/tarmac/concrete that the person and car are standing upon. How many people would operate two inverters in a car (for different equipment) and does this double the shock risk? What happens if the two items of equipment are connected together (e.g. DVD player and TV in a motor-caravan (mobile home))? Regards Tim
************************ Tim Haynes A1N10 Electromagnetic Engineering Specialist SELEX Sensors and Airborne Systems 300 Capability Green Luton LU1 3PG ( Tel : +44 (0)1582 886239 7 Fax : +44 (0)1582 795863 ) Mob : +44 (0)7703 559 310 * E-mail : [email protected] P Please consider the environment before printing this email. There are 10 types of people in the world-those who understand binary and those who don't. J. Paxman ________________________________ From: [email protected] [mailto:[email protected]] On Behalf Of Scott Xe Sent: 17 March 2009 13:10 To: [email protected] Subject: Intersting question!! *** 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. In the Uk, regardless of class 1 or class 2 products, the product has to be fitted with a 3-pin plug. How many users do understand the product required earthing or not? If the answer is NO in general, how can the users be avoided using below products incorrectly. For example, the 12 V DC to AC inverter used in car. Normally this type of product provides a socket accepting a 3-pin plug and has no earth connection. How can the users be told not to plug in an appliance that requires earthing? Is there any safety clause to govern this type of issue? Thanks and regards, Scott - 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]> 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. 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]>
