example based on tests done with UL personnel - the 94V-0 rating is based on:
Flaming combustion time for each specimen less than or equal to 10sec - AND - Summation of total flaming combustion time for all 5 specimens of any set less than or equal to 50 sec for each individual test, any single failure requires a complete new sample set, where no failures are allowed. also interested in hearing about requirements of any other NRTL when the test standard is UL94. From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Momcilovic, Nick (GE Healthcare) Sent: Monday, January 12, 2009 12:01 PM To: emc-p...@ieee.org Subject: UL 94 Table 8.1 Interpretation I have heard two interpretations for the first two criteria conditions shown in Table 8.1 of UL 94. If you are familiar with the flammability testing of UL 94, let me know which interpretations you believe are correct. I have heard arguments for both. First criteria - "Afterflame time for each individual specimen t1 or t2" Int.1 - both t1 AND t2 have to be equal or less than x-seconds Int.2 - either t1 OR t2 can be less than x-seconds Second Criteria - "Total afterflame time for any condition set (t1 plus t2 for the 5 specimens)" Int.1 - t1+t2 for each individual sample has to be equal or less than x-seconds Int.2 - t1+t2 for all 5 samples cumulative has be equal or less than x-seconds Regards, Nick Momcilovic - 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 <emc-p...@ieee.org> 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 <emcp...@ptcnh.net> Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com>
