Doug, Flammability marking is not always required. Take a look a the Yellow Book or UL's web site, it is not mandatory for the category and many PCB vendors marking requirements don't indicate it as a requirement, only optional especially when a particular grade designation is only available in one flammability (V0 for instance).
I like to have it included as part of our print to make it a requirement of the vendor for our own purposes and to ease inspections but a few of the vendors we deal with would not have a flame rating on the board if we were not asking for it. Dan From: [email protected] [mailto:[email protected]] Sent: Thursday, June 19, 2003 2:26 PM To: POWELL, DOUG Cc: EMC-PSTC (E-mail); [email protected] Subject: Re: PCB marked for UL 94V-0 Hi Doug, My experience with this is that most reputable PCB vendors are true to their word. The liability involved in falsely stating compliance is just too great. The other thing is to select PCB vendors that are listed with an agency (UL,CSA, etc.). The PCB vendor has to put their name or logo on the PCB as well as the flame rating. Copies of these logos used to be in the UL yellow book. If you have a PCB marked as V-0 and there is no manufacturers marking on the board, I would be suspicious. To satisfy yourself, you can send samples of the PCB to a testing lab (UL, CSA, etc), and for a suitably exhorbitant fee they will do the tests for you. The other alternative is to get the vendor to provide you with a test report from the agency Regards Doug Beckwith Mitel Networks This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc 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] Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
