Dear All, A telecom rack subsystem has two power entry modules (for redundancy); two cables, one for each power entry module, each consisting of 3 leads (+, - and earth), are terminated by means of a 3-pole connector to each power entry module; the other end of the cables are terminated to one 5-pole connector where two of the earthing leads are terminated together in one terminal of the connector and the other four leads (supply) are terminated to each of the remaining terminals of the connector. This 5-pole connnector is the connection to the power distribution unit which has the main earthing terminal, power supply connections and circuit breakers.
1. Do you see a problem with UL1950/EN 60950 of terminating two earth bonding leads to one terminal? I should state that the connector is Recognized but most likely evaluated to accept one wire per terminal. 2. Assuming that the combination of connector and two leads in one terminal was submitted for a separate investigation (to one of the connector standards), is there some clause in the standard which will not allow me to use this type of termination? 3. In lieu of 3 leads/cable, can manufacturer use 2 leads/cable and use the shield of the cable as the earth bonding "conductor"? 4. For wire terminations in general, I find that more and more manufacturers like (for manufacturing reasons) to terminate their leads to insulated bullet type pressure terminal connectors prior to terminating them to connectors and/or terminal blocks employing pressure wire terminals. However, even though the connectors/terminal blocks are Recognized, these bullet type connectors are not Approved. Is anyone using the same technique in manufacturing? If so, do you use Listed and/or Recognized bullet-type pressure wire connectors? If so, can you supply with some manufacturer's names of such connectors? 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).
