John, Appreciate your good advice! My further check with the multiple sockets indicates that although the power cable consists of 3 cores, the earth connection is for the mains sockets connection and the product is of class 2. I compared with other similar type of portable extension sockets and believe they are all of class 2 and the earth connection has no relation to its safety construction. Thus the data shall be:
240 V AC 50 Hz "Double Square Symbol" Your advice "This product must be earthed" is correct to the mains sockets. If both "Double Square Symbol" and "This product must be earthed" are put on the product, it may cause confusion. Any further advice? Thanks and regards, Scott On 26/7/13 1:43 PM, "John Woodgate" <j...@jmwa.demon.co.uk> wrote: > In message > <CAHX0HwVy+91KQRJAVafypvckC1QY57dmtU6=xyyqcuauaf5...@mail.gmail.com>, > dated Fri, 26 Jul 2013, Scott Xe <scott...@gmail.com> writes: > >> >> I just wonder how to describe such product in rating label. The USB >> part is class 2, 110-240Vac, 50/60 Hz and 13A sockets part is class 1 >> and 240Vac 50Hz. They just share a mains cord in the same enclosure. > > You can really only have one set of power data and of course the voltage > range of the USB section can't be used. A product that is part Class I > and part Class II must be treated as Class I. > > So the data would be: > > 240 V AC 50 Hz This product must be earthed - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. 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...@radiusnorth.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
