In message <[email protected]>, dated Wed, 24 Feb 2010, "Kunde, Brian" <[email protected]> writes:
>The manufacturer of the switch/breakers will not make it without the | >and O symbols without loosing its VDE certification. > Manufacturer not sensible. The marking is restricting sales of the product. VDE wouldn't charge too many million dollars to certify a variant without the marking. > >I?ve been telling engineering that the | and O symbols can only be used >on the Disconnect Device. Am I wrong? No, although these symbols and their restrictions do cause difficulties, as you have found. > >The standard says, ?Symbols | and O shall not be used for switches >other than the power supply switch.?, however, section 5.1.6 says, ?If >the power supply switch .. is used as the disconnecting device&?, >implies that a power supply switch does not have to be the Disconnect >Device. That means that the mains plug can be designated as the disconnect device, allowing the main power switch to be single-pole. > >Please help clarify this circular logic for me. I don't see any circular logic. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK I should be disillusioned, but it's not worth the effort. - 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]>
