>I really think this is beyond sensible. The emission limits have been >set, **taking into account that one product is very rarely use in an >environment where there is no other product operating and emitting.**
... **taking into account that a single piece of equipment is very rarely used in (large) numbers together.** The leakage current issue is much more relevant than you suggest. A single fault in a rack of equipment (lost ground = defined test) effectively creates a rack (assumed metal) with a touch current equal to the sum of the touch currents of the individual equipments. John, while you are in generally well informed and very to the point, in this issue you advocate points of view, that may put members of this list and their customers in legal and technically risky situations. Please all, be aware that this is a grey area in regulations in the EC and I must all advice you to be careful when just assemble piles of equipment in a rack, and put that on the EC market. Read the essential requirements of the EMCD and LVD, carry out a risk assessment on EMC and Safety and be "due diligent" A good TCF may very well create sufficient protection without (much) testing. Some simple measures will almost always be necessary. And I know John, if you create a rack of equipment the risks are the same, you are right, but a natural person *has* the right to live riskfully (is that good English?), but a company does *NOT* have the right to expose it's customers to any avoidable risk. Gert Gremmen Ce-test, qualified testing Van: [email protected] [mailto:[email protected]] Namens John Woodgate Verzonden: vrijdag 30 oktober 2009 8:01 Aan: [email protected] Onderwerp: Re: certifying overall products vs. certifying individual constituant chassis In message <[email protected]>, dated Thu, 29 Oct 2009, Cortland Richmond <[email protected]> writes: >Willful ignorance -- choosing to ignore a fact one knew or should have >known -- is far from being a defense when questioned on compliance >matters. Would the choice not to test for combined leakage current in >a medical device render the a marketer immune who know each part >contributed to a level over that permitted? IMO the same logic applies >to emissions. No-one is advocating wilful ignorance. I pointed out that the situations with safety and EMC are somewhat different. For safety, it may well be necessary to investigate temperatures, **whoever** puts the products into the rack. With regard to leakage current, the total value of current does not depend on whether the products are in a rack or not. > >IMO, even if one is not legally required to test, -- as in the sale of >components direct -- one might well find himself in violation of >implied warranty of serviceability should a customer find himself >forbidden because of emissions to use what we sold him. I really think this is beyond sensible. The emission limits have been set, **taking into account that one product is very rarely use in an environment where there is no other product operating and emitting.** The overall level of emissions cannot possibly be affected by whether it was the user or the manufacturer that put a set of compliant products into a rack. -- 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 Help stamp out intolerance! - 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]> - 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]>
