Hi everybody. Thanks very much for your helpful comments. The issue is put to bed now on my end, and I will revert to "listening in" for a while. We have decided to have the adapter looked at under both regimes for the additional "edge," whether strictly needed or not.
Angus McGill Cascade Engineering Services, Inc. From: Peter L. Tarver To: emc-p...@majordomo.ieee.org Cc: richhug...@aol.com Sent: 5/13/03 7:32 AM Subject: RE: Power Adapter LPS Hi, Richard. > From: richhug...@aol.com > Sent: Monday, May 12, 2003 5:47 PM > > Peter, > > I presume that you replying here for product use > in North America only? Yes. UL1310 being a US standard with close ties to NFPA70, Article 725 and a title of Class 2 Power Units (used to be titled "Direct Plug-In Transformer Units"). Also, all standards references were to UL standards, leaving the distinct impression of a North American only query. Admittedly, this is sometimes not the case. > The original question was about meeting LPS > requirements in UL 60950 and > Angus McGill asked if having such a supply would > help in obtaining UL > approval for the IT equipment (i.e. ITE). I've already deleted the original posting, but I believe the question was related to whether or not additional testing of a Listed Class 2 Power Unit to LPS requirements would aid in obtaining certification. If this was the question, the answer is no. If the question was intended to go beyond this, then, certainly, the issues you mention and many others, still need review. Regards, Peter L. Tarver, PE Product Safety Manager Sanmina-SCI Homologation Services San Jose, CA peter.tar...@sanmina-sci.com > From: Peter L. Tarver > Sent: Monday, May 12, 2003 2:40 PM > > Angus & Doug - > > Even though 1310 power supplies may only comply with Basic > Insulation (per UL60950), they have the bejeebers > tested out > of them. UL1310 emphasizes testing over construction, > whereas UL60950 emphasizes the contrary. > > Since a UL1310 power supply must meet the requirements for > NEC Class 2 power sources, there is no need for any > additional testing to demonstrate compliance with LPS > requirements in UL60950. The LPS requirements are derived > from (though somewhat less stringent than) NEC Class 2 > requirements. > > > Regards, > > Peter L. Tarver, PE > Product Safety Manager > Sanmina-SCI Homologation Services > San Jose, CA > peter.tar...@sanmina-sci.com 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@attbi.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org 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
