I certainly have a lot of "small" plastic parts in my products which I consider to be "exempt" and are not described in any procedure - and they may well be a lot bigger than your standoff !! I certainly think your agency is not-picking !!
One point to consider is that I write the procedure for UL and the report for CSA for my products, and I include what I think should be included, and exclude what I don't think needs to be there - and if you could work this way with your agency,(if they will let you), you will save yourself a lot of grief. John Crabb, Development Excellence (Product Safety) , NCR Financial Solutions Group Ltd., Kingsway West, Dundee, Scotland. DD2 3XX E-Mail :[email protected] Tel: +44 (0)1382-592289 (direct ). Fax +44 (0)1382-622243. VoicePlus 6-341-2289. -----Original Message----- From: Terry Meck [mailto:[email protected]] Sent: 20 February 2001 15:44 To: [email protected] Subject: FLAME RATING OF STANDOFFS Hi group! I need a sanity check on a `new approach' our safety agency has recently taken. We have an open frame power supply ( has all the certs through the CB report etc. for EN 60950 UL 1950 ) On of the conditions of acceptability is one mounting standoff shall be insulated. We have this supply in no less then 4 listed products without any reference to the flame rating of the standoff having to be checked when the inspector comes in. I consider that to be reasonable. section 4.4.3.3 UL 1950 has exception: "gears, cams, belts, bearings and other small parts which would contribute negligible fuel to a fire;" Recently new products have been reviewed and the new procedures require `traceable 94V-2' standoffs!?!? Which manufacturing engineering says is difficult to procure a traceable recognized plastic standoff. Questions: Has my fever and pneumonia the past weeks clouded my reasoning? What am I missing? You place a .5 inch #6 standoff between a V-0 board and a medal chassis what requires a recognized part except maybe `straining out the gnats so we can swallow the camel' somewhere else. Sick and Tired Terry J. Meck Senior Compliance / Test Engineer Accu-Sort Systems ------------------------------------------- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. To cancel your subscription, send mail to: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Jim Bacher: [email protected] Michael Garretson: [email protected] For policy questions, send mail to: Richard Nute: [email protected]
