In message <[email protected]>, dated Wed, 9 Apr 2008, "Kunde, Brian" <[email protected]> writes:
>For instance, EN 55014 was originally for motor driven household >devices and power tools such as blenders, washing machines and hand >drills, but today manufacturers are incorporating high speed >electronics into everything. So don't you have to ALSO test to EN 55011 >or EN 55022? Refrigerators used to be a motor and a light bulb; but now >they have micros running with clock speeds over 100Mhz. > >The same argument can be made with medical or laboratory equipment. If >such a device has a motor in it shouldn't you also consider performing >the click test according to EN 55014? Not 'have to' in Europe. This was established many years ago, as a result of a question from the Irish National Committee, 'Is a washing machine with a microprocessor a household appliance or ITE?' The ruling was that 'Function determines the standard, so EN 55014 applies.' If you think about it, if this principle didn't apply, and regulators could just pick any provision from any standard and say that it applies, manufacturers would have no way of being confident enough to sign the DOC! What REALLY matters is Article 4 of the old EMC Directive (Annex I of the new one). Irrespective of any standards, products must not cause unreasonable interference or be unduly susceptible to it. There is NO obligation to apply ANY standard, but a prudent manufacturer would take note of the points you make and voluntarily investigate any such matters. The 'click' provisions in CISPR 14-1/EN 55014-1 are about thermostats and similar switching devices, not primarily motors. Do motors click? -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Murphy's Law has now been officially re-named The Certainty Principle John Woodgate, J M Woodgate and Associates, Rayleigh, Essex 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/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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
