In a message dated 8/28/2002, Chris Maxwell writes:
> Can anyone see any "pinholes" in my reasoning? Can anyone recall the thread > regarding multiple layers of thin insulation? > Hi Chris: Wow, you are really pushing the limits with your board design. I work with EN 60950, and the clause in the third edition that is relevant to your question is 2.10.5.3, "Printed Boards." The default requirement is 0.4 mm insulation thickness, but there are alternative methods listed in Table 2M. For instance, you can use three layers of sheet insulating material including pre-preg. You can even use two layers if you run a routine production test for electric strength. I don't know how much of this is relevant to EN 61010-1, but hopefully the info on 60950 will be useful in pursuing this. Joe Randolph Telecom Design Consultant Randolph Telecom, Inc. 781-721-2848 http://www.randolph-telecom.com
