In article <OFD54B8152.8F95BB54-ON48256F3A.000C1652-48256F3A.000D746F@np .edu.sg>, Wan Juang Foo <[email protected]> writes >Hi PSTC Forum, >Recently I reveived an enquiry regarding testing wall warts (AC/DC >adaptors) to IEC 61000-4-4 and -5 without their 'wards' ( portable >device like Cellphone, Laptops, PDA, MP3 player etc..). I note that >these wall warts are bundeled and sold together even though these are >ususally general purpose and can be bought 'off the shelf' in a >'supermarket'. > >What is our take on this.
There is a separate safety standard for warts with mains-frequency output, so it's perhaps possible to apply that standard. But there is no such standard at present for warts with d.c. output. Furthermore, a wart and ward sold together form a 'system' under the EMC Directive and must be tested together, because one CE mark applies to the system as a whole. See the Directive and 6.4.2.1 of the Guidelines. I have to say that this latter point has very recently come as a surprise to some people and may be challenged, but I doubt that a challenge would be successful, at least until the new Directive comes into effect, and we don't even have a final version yet. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Ron Pickard: [email protected] Scott Douglas [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
