According to the company's mail server, this msg bounced. better late than never...
> -----Original Message----- > From: Brian O'Connell [mailto:[email protected]] > Sent: Monday, November 20, 2006 8:28 AM > To: '[email protected]' > Subject: RE: Will UL506 be replaced by UL5085? > > Correction to my previous post. > > As usual, I had to find out from CSA about what is happening > with UL standards. Note that I have no record of any > notification from UL of 506 being superceded or withdrawn. > Following is from the CSA web site: > > "This is the common CSA and UL standard for low voltage > transformers. It is the first edition of CSA C22.2 No. 66.2 > and the first edition of UL 5085-2. This edition of CSA C22.2 > No. 66.2 supersedes the requirements of CSA C22.2 No. 66 > published in 1988. This edition of UL 5085-2 supersedes the > Twelfth edition of UL 506 published in 2000." > > > even more luck, > Brian > > > -----Original Message----- > > From: Brian O'Connell [mailto:[email protected]] > > Sent: Monday, November 20, 2006 8:16 AM > > To: '[email protected]' > > Subject: RE: Will UL506 be replaced by UL5085? > > > > > > I have not heard about any UL intent to withdraw 506. UL > > transformer safety standards, as either an end-use product or > > as a component, are problematic, and have resulted in many > > "interesting" discussions between myself and the good people > > of UL. There are too many UL transformer standards, and they > > all have significant overlap, and in some cases, have > > contradictory construction and/or test requirements for the > > same intended use. > > > > FWIW, I would tend to believe that 1585 and/or 1411 would be > > more likely to be replaced by one of the 5085-x series. > > > > I have used 506 as the target for "construction only" > > component transformers, where the end-use installation is > > investigated to 60950-1 or 60601-1. For end-use stuff, I > > typically use 1585, or the (older) standard 1411 (whatever > > the customer wants...). I would resist the temptation to use > > 1310 for a supposed end-use class 2 or 3 transformer; or 1012 > > for other than class 2 or 3. > > > > So after all of this (worthless) commentary, I will further > > confuse the issue by saying there are yet other UL > > transformer safety standards; such as 1561 and 1876 that have > > slightly different scopes, but are still applicable to low > > voltage (600V for US NEC) end-use applications. In case you > > have not caught on, this multitude of UL standards having > > similar scopes, continues to be a very sore point for me... I > > feel better now that I have complained. > > > > In any case, the ultimate answer will have to come from UL. > > > > luck, > > Brian > > > > > -----Original Message----- > > > From: [email protected] [mailto:[email protected]]On Behalf Of > > > Gordon,Ian > > > Sent: Monday, November 20, 2006 6:42 AM > > > To: 'IEEE EMC & SAFETY PSTC' > > > Subject: Will UL506 be replaced by UL5085? > > > > > > All > > > I have heard that UL506 will be replaced by UL5085. > > > Does anyone have any information on these changes? > > > I think there's a paper on the IEEE website but it's in the > > > "subscription > > > only" area. > > > > > > Thanks > > > > > > Ian Gordon > > > - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] 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] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________
