1. You have already received many good material suggestions from by others but do you really need 94V-0? I believe that most standards will allow 94V-2 for this purpose (assuming it provides the necessary creepage & clearance distances and passes the dielectric strength test). 2. If the enclosure is grounded, the insulation will serve as basic insulation = creepage & clearance distance + hipot test. If the enclosure isn't grounded, the insulation will serve as reinforced insulation = be careful, some safety standards have a minimum thickness requirement for reinforced insulation if only one layer of the material is used (other standards indicate that whatever thickness passes the hipot test is acceptable). 3. I suggest that you consider a method of mechanical securement so you don't have to worry about the reliability/certification of an adhesive. Punching holes in the insulation that fit over existing standoffs is one option. 4. Be careful if there is any pressure between the board and enclosure = this could create reliability questions if a sharp solder pad could put a hole through the insulation.
Regards, Bill Bisenius E.D.& D. [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Tuesday, August 12, 2003 1:55 PM To: [email protected] Subject: 94V-0 question I need a sheet of plastic that goes between a PCB and a metal enclosure. This is to make a creepage spec. What plastics are good for this? Will polycarbonate be suitable and have a 94V-0 rating? Thanks. Dave Cuthbert Micron Technology 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 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
