John, ----- Original Message ----- From: "John Woodgate" <j...@jmwa.demon.co.uk>
> I explained that if there is accidental contact between an SELV circuit in > a building and a power circuit, the SELV circuit can go to, and remain > indefinitely at, full mains voltage. Everything clear. I didn't considered such scenario (forgot you have written that). To solve both scenarios SELV should be not grounded, but each device should start an alarm seeing mains at its SELV - the best way to extra complicate all devices. Best Regards Piotr Galka - 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 <emc-p...@ieee.org> 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
