In message <[email protected]>, dated Tue, 17 Mar 2009, Scott Xe <[email protected]> writes:
>I am unsure why there are majority two classes: class 1 with earth >protection and class 2 without earth protection, but not only class 2. >Class 1 products provide additional protection using the earth path in >case of basic insulation at fault. With this inverter and class 1 >product, this protection becomes failure. In normal use, there should >be no any safety risk. However, in case of basic insulation at fault, >it may give less protection to the users. No, it doesn't. There is no earth inside the car. Someone can even touch the live terminal of the inverter output and will not receive a shock, because there is no return path for current to the neutral terminal of the inverter. Try drawing the circuit. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. 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]>
