Hi Steve: More than you need to know about ferrules and UL 508: https://www.youtube.com/watch?v=3B09qSLek8Q I suspect that few commercially available ferrules are V-0. I found ferrules that were nylon or vinyl. Nylon is HB. However, UL certifies ferrules, UL 486F. Para. 6.3.1 a) specifies HB flammability. My suggestion is to subject the assembled ferrules to the UL 94 V- test. The wire insulation is rated VW-1. The copper wire will heat-sink the ferrule, especially if the wire end goes into a terminal. Assembled, I suspect that an HB ferrule will pass the V-0 test, or be close enough. Not much fuel in a ferrule . Chances are that the ferrule will be completely consumed before the V-0 test is complete due to the ten 10-second flame applications. I’ve attached my data sheet for the UL 94 V- tests. Note that the difference between V-1 and V-2 is that V-2 has flaming drops that ignite cotton. Best regards, Rich From: sgbrody <sgbr...@comcast.net> Sent: Monday, April 3, 2023 12:46 PM To: EMC-PSTC@LISTSERV.IEEE.ORG Subject: [PSES] Ferrules Hi all, I have a 3rd party who is requiring 94V-0 on the ferrules of a connector. Up to now the ferrules being used have been HB. What say ye, esteemed experts? Opinions, comments welcome. - ---------------------------------------------------------------- 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.ieee-pses.org/emc-pstc.html Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Mike Cantwell <mcantw...@ieee.org> For policy questions, send mail to: Jim Bacher: <j.bac...@ieee.org> David Heald: <dhe...@gmail.com> _________________________________________________ To unsubscribe from the EMC-PSTC list, click the following link: https://listserv.ieee.org/cgi-bin/wa?SUBED1=EMC-PSTC&A=1
UL94d.pdf
Description: Adobe PDF document
