I read in !emc-pstc that Brian O'Connell <[email protected]> wrote (in <[email protected]>) about 'subcontracted parts - compliance with EN's' on Thu, 26 Sep 2002:
>I can think of no reason to ever build in a component power supply, that is >connected to mains, or a safety-related TNV source, that does not have an >existing CB report and/or a major agency approval. We don't have 'approval', in the sense you mean, in Europe any more. We do have 'certification', but it is purely a civil matter between manufacturer and test-house - it has no legal status in itself. >There is no way that you >can demonstrate control of the construction of a power supply unless the >vendor is subject to FUS audits by the applicable agency(s). Yes, that is so. Any reputable supplier of OEM power supply units has his range already vetted for safety. **as far as the standard can be applied**: if the unit is not enclosed, no tests on the enclosure are possible, of course. EMC is another matter; loads on the supply unit may considerably change the conducted emissions on the supply cable, for example. > >A (CE-type) declaration of conformity does not prove anything. Well you can only have a DOC on a finished product, and it must be issued by the manufacturer, no-one else. Whether it proves anything depends on the probity of the manufacturer. > >You do not need construction details for a recognized power supply, your >agency engineer will be the "escrow agent" for the CB report. My complany >routinely provides copies of our CB report to agency engineers. This is not applicable in Europe. US-based test houses may operate such a scheme even for products intended for Europe, but we don't have 'agency engineers'. > We seldom >provide detailed construction data to a customer, unless it is a custom >power supply. Get a copy of the installation instructions, a copy of the CB >and safety agency certs, and you are done... Yes, that should be sufficient. IT ISN'T if there is no CB or other similar certification. -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [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://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
