Julian, I have recently had a client ask an almost identical question. My answer is simply Yes !. EN 60950-1 is in deed an appropriate standard. The BS7671 (lEE regulation) is essentially for electrical installation of buildings and temporary installations.The regulation requires that a product outside its scope is required to comply with an appropriate standard. In fact, the regulation states that it does not deal with requirements for the construction of assemblies of electrical equipment, which are required to comply with an appropriate standards. Furthermore, it's scope has never included Particular products and most definitely not a telecommunication rack, which In fact is often hardwired or fitted with industrial type B plug. Having said all of that, the customer is well within his right to ask for additional safety as long as it is recognised that it is over and above the minimum safety requirements of the correct standard for a PDU-EN60950. Good Luck.
Kismet Onyeforo Principal Engineer NEMKO Ltd Tel: +44 (0)20 8646 8383 (Switchboard) Fax: +44 (0)20 8646 8099 Tel: +44 (0)20 8254 5242 (Direct Line) Email: [email protected] Web: www.nemko.co.uk From: [email protected] mailto:[email protected]]On Behalf Of Julian Jones Sent: 31 January 2005 15:47 To: [email protected] Subject: PDU in an ITE rack Dear experts We have a customer who has had their declaration of conformity questioned by the purchaser. The equipment is a 42U 19 inch rack, with approx 40 ITE products within it. the rack is fed from a single phase 63A socket. The total load is approx 45A. the whole rack has been tested by a USA safety lab to EN60950 3rd edition. the (UK ) end customer is now questioning whether the DoC should reference BS7671 (UK's Wiring Regulations)with the result of the 63A feed being hardwired, secondary earthing being implemented to meet the earth-leakage requirement and the power distribution being redesigned to prevent "daisy-chaining" pluggable earth connections. Over the years we have EMC tested many racks but never seen one which did not have pluggable mains connectors. Each 'component' within the rack draws a max of 2A most at 0.5A We do not have safety expertise within the company, so I asking this question of the forum. "Is EN60950 the right standard for power distribution inside a rack?"" rgds, Julian Jones Hursley EMC Services Ltd Julian Jones Hursley EMC Services Ltd Brickfield Lane, Chandlers Ford EASTLEIGH, SO53 4DP, Hampshire Tel: 44 ( 0 ) 23 8027 1111 www.hursley-emc.co.uk Internet communications are not secure and therefore Hursley EMC Services Limited (HEMCS )does not accept legal responsibility for the contents of this message. Although HEMCS Limited operates an anti-virus programme, it does not accept responsibility for any damage whatsoever that is caused by viruses being passed. Any views or opinions presented are solely those of the author and do not necessarily represent those of HEMCS. Replies to this email may be monitored for operational or business reasons. ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [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://www.ieeecommunities.org/emc-pstc ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/listserv/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [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://www.ieeecommunities.org/emc-pstc
