Class 'II' is a construction type that cannot rely on just basic insulation for protection from shock.
Class '2' is a rating where exposed conductor and outputs have a limited V and VA - which can be different for some standards and can vary for various electric codes. Class 2 is NOT the same is class II. A class II construction does not necessarily have to be rated class 2. A unit rated class 2 does not necessarily require class II construction. Brian > -----Original Message----- > From: [email protected] [mailto:[email protected]]On Behalf Of > Umbdenstock, Don > Sent: Thursday, December 03, 2009 4:39 AM > To: James, Chris; Scott Douglas; EMC PSTC > Subject: RE: IEC 60065 vs IEC 60950-1 > > Although they both address the same hazard, they do so > differently. As > I recall from an issue I had a couple of years ago from a similar > situation, 60950 allowed a product to be built without a > fire enclosure > if it was powered by a Class II or certified LPS power > supply along with > certain other conditions, whereas 60065 mandated that the power input > was no greater than 15W. Thus there were 2 different approaches to > controlling the same hazard. This might be part of why your > agency is > hedging a bit. On the other hand, a more reasonable agency > sounds more > logical... > > Don Umbdenstock - 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 <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc Graphics (in well-used formats), large files, etc. can be posted to that URL. Website: http://www.ieee-pses.org/ Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
