In message <[email protected]>, dated Wed, 2 Aug 2006, Chuck McDowell <[email protected]> writes >Working on the newest thing, I find I need help defining what qualifies >as a heatsink. > >Does Guide ISO-IEC 51, IEC 60050, or IEC 60743 define Heatsink?
I doubt that it's defined anywhere. I wouldn't know how to write a definition that was useful without being undesirably restrictive: heat sink a structure intended to allow heat to dissipate into its surroundings > >Can I as the manufacture specify to our safety agency that an item or >area of a product is the ?Heatsink?? I don't see why not, but the devil could be in the detail. > >Can an entire metal housing be allowed the heatsink temperature rise >(device has no user controls after install in ceiling or wall mount)? Probably not; in 60065, for example, there are different temperature rise limits for accessible parts and parts deemed inaccessible. If you are looking at IEC/EN 60065:2002 Table 3, look at condition (superscript)b. Is there something specific there that you are uncertain about? > >Does it have to have fins? No. -- OOO - Own Opinions Only. Try www.jmwa.demon.co.uk and www.isce.org.uk 2006 is YMMVI- Your mileage may vary immensely. 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 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
