Hi Duncan, I have the following information, I think I got it from my local KTL lab:
EN60950:1992 VS EN60950:2000 Updated Safety Requirements for IT & Telecoms Equipment Under the Low Voltage Directive EN 60950:2000 was implemented at a national level on 1st January 2001, replacing EN 60950 : 1992 including amendments: 1,2,3,4 and 11, which will be withdrawn in due course. EN 60950:2000 is a harmonised standard under the Low Voltage Directive and as such compliance with it provides a presumption of conformity with the essential requirements of the Directive. The European Commission publishes dates for cessation of the presumption of conformity, as shown below: Amendment (A1) EN 60950 : 1992 1st March 2000 (Expired) Amendment (A2) Amendment (A1) 1st March 2000 (Expired) Amendment (A3) Amendment (A2) 1st January 2002 Amendment (A4) Amendment (A3) 1st August 2003 Amendment (A11) Amendment (A4) 1st August 2003 EN 60950 : 2000 Amendment (A11) 1st January 2005 What are the main differences between EN 60950 : 2000 and EN 60950 : 1992 inc amendments ? The most obvious change in the new standard relates to the clause numbering, which has been dramatically re-organised, but there are also a number of amendments and additional requirements as follows: Batteries There is a requirement to consider, and in some cases test, any battery installed in the equipment, (not just lithium batteries as previous). Also manufacturers of equipment powered solely from an internal power source can now use the relaxation under clause 4.4.5.2 covering the need for a fire enclosure. Protective Earthing / Bonding Methods of determining the resistance of earthing conductors and their minimum cross sectional areas have been added or modified. Also tests have been made more onerous for the testing of earth conductors within equipment rated in excess of 16A, and earth bonding conductors must be separated from protective earthing conducters. Opto-Isolators Tests are now specified under clause 2.10.5.1. Also the distance through the insulation for supplementary and reinforced insulation is relaxed under certain circumstances. Alternative Method for Determining Clearance Annex G provides an alternative method of determining clearance. Mains Cords The minimum designation for detachable mains cords is now the same for equipment with a mass up to 3kg, irrespective of the total mass. Also the cross sectional area of mains cords table has been expanded to include higher currents. Wiring Terminals Included in clause 3.3.6 are a number of constructional requirements for the terminal supplied for the connection of permanently connected equipment or equipment with ordinary non-detachable power cords. 10N, Steady Force Test A new test has been added requiring components and parts to be subjected to a 10N force. Wall & Ceiling Mounted Equipment A force equal to 3 times the mass of the equipment or 50N (whichever is greater) is now applied when the equipment is mounted on the wall or ceiling, to ensure it does not become unstable. Openings in Transportable Equipment New requirements have been added addressing problems of foreign objects entering equipment, e.g. lap top computers, from any orientation and being subject to movement within the enclosure. Leakage Currents to & from the Networks The standard addresses leakage currents to and from the telecommunications networks and also considers hazards which may arise as a result of leakage to or from multiple network connections. Flammability A number of alternative methods of determining flammability have been added, including the Glow Wire Test for components and parts located outside fire enclosures. Kind Regards Alex McNeil Principal Engineer Tel: +44 (0)131 479 8375 Fax: +44 (0)131 479 8321 email: [email protected] -----Original Message----- From: [email protected] [mailto:[email protected]] Sent: Tuesday, March 26, 2002 8:45 AM To: [email protected] Subject: EN60950:1992 vs EN60950:2000 Group, Does anyone have a list of all the differences between EN60950:1992 and EN60950:2000? If so may I have a copy. Many thanks in advance Duncan Hobbs. ---------------------------------------------------------------------- The contents of this communication are confidential to the normal user of the email address to which it was sent. If you have received this email in error, any use, dissemination, forwarding, printing or copying of this email is strictly prohibited. If this is the case, please notify the sender and delete this message. ---------------------------------------------------------------------- ------------------------------------------- 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. 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