Doug, UL Recognitiion vs TUV GS (Listing) can be because of many factors. Some are specified below:
1. UL interpertation of some requirements in the standard could have bee different than TUV's interpretation. 2. The product met all of the EN60950 requirements but lacked some of the US deviation requirements. 3. Inexperienced safety engineers. 4. My best guess is that UL Recognized the unit instead of Listing it because something to do with the fire enclosure - check if bottom openings meet the EN 60 950/UL60950 requirements. It may be that TUV GSsed the unit based that the safety instructions specify the unit is to be installed within a metal rack which has no openings on the bottom and UL was unable to accept this type of construction. Best Regards This e-mail message may contain privileged or confidential information. If you are not the intended recipient, you may not disclose, use, disseminate, distribute, copy or rely upon this message or attachment in any way. If you received this e-mail message in error, please return by forwarding the message and its attachments to the sender. PETER S. MERGUERIAN Technical Director I.T.L. (Product Testing) Ltd. 26 Hacharoshet St., POB 211 Or Yehuda 60251, Israel Tel: + 972-(0)3-5339022 Fax: + 972-(0)3-5339019 Mobile: + 972-(0)54-838175 http://www.itl.co.il http://www.i-spec.com -----Original Message----- From: Doug McKean [mailto:[email protected]] Sent: Wednesday, October 09, 2002 5:44 PM To: EMC-PSTC Discussion Group Subject: Question regarding something slightly unusual ... In 20 years, I've never seen this before but that's not saying much. Why would a mfr get a UL recognition approval for a commercial ITE style single phase 155-230vac computer style product but for that same product get the TUV "GS" mark? Mfr is a stateside company. Product to be used in restricted areas with trained personnel only. But, one that essentially anyone could buy. What's the advantage of getting such a mixed set of approvals? I would assume such a thing would normally get a Listing. Maybe turning the question around for our overseas friends - why would you get a GS mark for your product but only get UL recognition for an ITE computer product when it's normal to get a listing for such a product? And now I'm wondering if with such a device that there's some deviation within the testing as to cause the product to be GS accepted but not with a listing. Regards, Doug (scratching head...) ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" ------------------------------------------- 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
