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In article <DE87437FE365CB458C265EA3D73B6F1D0860CB@xbc- mail1.xantrex.com>, Ralph McDiarmid <[email protected]> writes >It's interesting to note that 60664-1 in clause 3.3.1 says that, "It is >not appropriate to specify the minimum thickness of solid insulation to >achieve long-term electric withstand capability". I believe this is relatively new thinking on the subject. Materials simply differ to much for a 'blanket' requirement to be valid. Consider what voltage 0.4 mm of PET film will withstand, compared with 0.4 mm of PVC. > However, some >product-specific standards do specify a minimum thickness, without >investigation. I suppose these are standards that have not yet been revised to take in the new thinking. -- Regards, John Woodgate, OOO - Own Opinions Only. The good news is that nothing is compulsory. The bad news is that everything is prohibited. http://www.jmwa.demon.co.uk Also see http://www.isce.org.uk This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. IEEE PSES Main Website: http://www.ieee-pses.org/ To post a message send your e-mail to [email protected] Instructions for use of the list server: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html 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://www.ieeecommunities.org/emc-pstc
