Arjen: Read the clause again. It actually says "if" before "of electrical grade paper". What they are doing is giving you a baseline against which other materials are judged. If the barrier is paper, it has to be 0.70mm thick. Other materials are judged using various requirements depending on the material, the application, and who is interpreting things.
Some (quite old) equivalence info can be found in CSA's Technical Information Letters (TIL) No. I-3 and I-3A, which list all kinds of materials and the thickness in which they are considered equivalent to 0.30mm of electrical grade paper. Note however that those TIL's assume the application is in transformer or motor windings, so a barrier in the sense of Std. 107.1 may need additional mechanical strength. Also these TIL's are quite old: you should ask your CSA contact if they think the TIL's are still valid (for anything) and are applicable for your 107.1 question. Hope this helps somewhat. Regards, Jim Eichner Statpower Technologies Corporation [email protected] http://www.statpower.com Any opinions expressed are those of my invisible friend, who really exists. Honest. > -----Original Message----- > From: Arjen Dragt [SMTP:[email protected]] > Sent: Wednesday, December 30, 1998 9:20 AM > To: EMC-PSTC Listserv > Subject: Insulating materials for barriers and liners > > Per CSA standard C22.2 No. 107.1 (General Use Power Supplies), Clause > 4.18.10, only electrical grade paper may be used as an insulating > material barrier. UL 1012 (Power Supplies other than Class 2) allows > for electrical grade paper as well as thermoplastic and other > polymeric materials. > I am wondering if thermoplastic (and polymeric materials) may also be > used in Canadian standards, and if so, where is it specified? > > Arjen Dragt > Compliance Engineering > Inverpower Controls Ltd. > Phone: (905) 639-4693 Ext. 211 > Fax: (905) 639-2918 --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], [email protected], or [email protected] (the list administrators).
