I think this gets back to what John W originally stated. A safety critical component is any component whose failure, modification or absence, will affect the safety of the product. Front of 950, defines also defines Safe as not causing a fire hazard.
There is no clear cut list of what is safety critical and what is only functional. That is what Safety Engineers and fault testing is for. "Allen, John" wrote: > Hi Folks > > I agree with John W - and a single fire can (and does!) kill and injure FAR > more people than a single electric shock. > > Additionally, a large number of products are SELV and/or battery operated > where there is no shock hazard but is often a fire hazard - think of the > power available from modern batteries, and especially vehicle batteries. > > John Allen > Thales Defence Communications Division > Bracknell, UK > > -----Original Message----- > From: John Woodgate [mailto:[email protected]] > Sent: 05 November 2001 22:36 > To: [email protected] > Subject: Re: "Safety Critical" etc - the future > > I read in !emc-pstc that CE-test - Ing. Gert Gremmen - ce-marking and > more... <[email protected]> wrote (in <ABEJKCKDFONELAIPOFHNMEFCEKAA.cetes > [email protected]>) about '"Safety Critical" etc - the future', on Mon, 5 Nov > 2001: > >Those components that encapsulate into one single component the 2 safety > >layers > >that are normally used to isolate the operator (and others) from a hazard. > >In electrical safety land that's mostly an electrical hazard > > A safety-critical component may be related to a fire hazard, not a shock > hazard. > -- > Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk > > Eat mink and be dreary! > > ------------------------------------------- > 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: > Michael Garretson: [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: > No longer online until our new server is brought online and the old > messages are imported into the new server. > > ------------------------------------------- > 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: > Michael Garretson: [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: > No longer online until our new server is brought online and the old > messages are imported into the new server. -- Andrew Carson - Product Safety Engineer, Xyratex, UK Phone: +44 (0)23 9249 6855 Fax: +44 (0)23 9249 6014 ------------------------------------------- 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: Michael Garretson: [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: No longer online until our new server is brought online and the old messages are imported into the new server.
