Dear All, I would like to know some of your professional advice on some issues reagrding rack systems to be evaluated to UL1950/EN 60 950.
1. For the North America, does a NEMA 125 V, 20 A plug meet the pluggable B definition? 2. What are some plug configurations which will meet the pluggable B equipment requirements for North America and Europe? 3. Does anyone have experience with UL and/or CSA and/or TUV when testing a unit employing a Recognized/Certified/Approved computer type "totally enclosed" power supply? I am interested to know if temperatures should be monitored within such a power supply. So far, I have been asked to thermocouple various points within the power supply and as you all know, it could get very crowded in there. I am interested to know if someone out there knows if such a waiver exists for totally enclosed Approved power supplies. 4. When conducting stability tests for rack systems, should all the serviceable card cages be extended out or is it enough to do it one at a time. 5. For a CSA NRTLC unit employed in the rack system, does anyone know if the CSA NRTLC Mark is automatically accepted by UL or does UL require that the unit must be re-investigated and placed under their Follow-Up Program? 6. Has the US Robotics Listed "Sporster" card modem been evaluated to UL1950 Third Edition? 7. Can I List/Certify a rack system to UL1950 Third Edition if the units within it have been Listed/Certified to UL1950 First and/or Second Editions? I do not think so, but am interested to hear your opinions. 8. How is a CB test report done for a rack system which consists of previously Listed/Certified/Approved units? Does the CB scheme Recognize the Approvals of the various test agencies (UL/CSA/TUV)? Thanks in advance. PETER S. MERGUERIAN MANAGING DIRECTOR PRODUCT TESTING DIVISION I.T.L. (PRODUCT TESTING) LTD. HACHAROSHET 26, P.O.B. 211 OR YEHUDA 60251, ISRAEL TEL: 972-3-5339022 FAX: 972-3-5339019 E-MAIL: [email protected] Visit our Website: http://www.itl.co.il --------- 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).
