In message <02C25AC68BAC40FF9BDFC923C3244473@MmPc21>, dated Fri, 18 Sep 2009, Piotr Galka <[email protected]> writes:
>> It seems strange that the connector on a cable needs no fire >>enclosure but the fixed connector into which it fits does need one! >>How do you plug anything into it through the enclosure? > >I don't know. I'm asking you, experts here. I know that you don't, but some of the guys here probably had a hand in writing that text, so know what they meant it to mean. The advice you were given about not using a PTC thermistor seems to be wrong. Clause 2.5, item b) of IEC/EN 60950-1:2006 allows the use of a PTC complying with selected requirements of IEC 60730-1. > >If you have the fire enclosure I see no problem, but elsewhere I don't know. > The simplest practical solution for your 12 V 0.3 A product is to sell the power supply with it. That way, you have provided an LPS. Sometimes you have to solve problem by looking for ways out that are not in the standards and not even in the circuits. For this issue, the solution is in the product make-up. If you can't do that, for some reason, then specify an LPS in the instructions and, if possible, label the power connector '12 V 0.3 A LPS source'. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk Things can always get better. But that's not the only option. John Woodgate, J M Woodgate and Associates, Rayleigh, Essex UK - 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]>
