Peter, Both IEC 60950 and UL 1950 include section 6 which details additional requirements for telecom equipment. The earlier parts of these standards also apply, including the 10N force tests.
If the 10N force test makes sense for typical working voltages of 120V or 230V, it certainly makes sense for tip/ring voltages that may reach -179V or so. George Alspaugh Product Safety Lexmark International Inc. ---------------------- Forwarded by George Alspaugh/Lex/Lexmark on 07/20/99 08:32 AM --------------------------- peter%[email protected] on 07/19/99 03:51:41 PM Please respond to peter%[email protected] To: emc-pstc%[email protected], treg%[email protected] cc: icohen%[email protected], alexp%[email protected], sgnatt%[email protected], zoharz%[email protected], pleifer%[email protected] Subject: 10 N force Test on Internal Components Prior to Overvoltage Tests Dear All, For IEC 950/UL1950, there is a requirements that before measuring spacings, a 10 N force test is required on internal components. However, there is nothing under the UL/CSA 1950 Overvoltage Tests (for telecom interfaces connected to exposed plant) which requires a similar test prior to conducting the tests. It seems very reasonable to apply the 10 N force on internal components (to simulate manufacturing tolerances and/or rough handling in the field) prior to conducting the Overvoltage Tests. I have seen telecom cards fail the test after a 10 N force is applied to internal components and pass the test without the Force Test. Question: Has anyone else encountered the same phenomenon? Question: What does everyone feel; should a 10 N force test be conducted prior to the Overvoltage Tests? 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).
