Hello, I have a related question. It is indicated that one can get a CB Scheme report to UL 1950. UL 1950 paragraph 6.6 requires an overvoltage test. Who makes these overvoltage testers?
Mat Mathew Aschenberg Agency Engineer EchoStar Technologies Corporation 90 Inverness Circle East Englewood, CO 80112 > -----Original Message----- > From: Grant, Tania (Tania) [SMTP:[email protected]] > Sent: Wednesday, May 10, 2000 7:51 PM > To: [email protected]; 'Jon Keeble' > Subject: RE: UL certification and Underwriter Laboratory > > > John, > > The 'UbackwardsR' mark' is but one of many UL marks. This is the UL > Recognition Mark;-- there are also UL Listing Marks, UL Classification > Marks, and perhaps others that I have forgotten. And you are correct > that > only UL can issue UL marks. However, UL can do this based on CB Scheme > reports, provided you have also complied with the U.S. National Electrical > Code requirements, which are spelled out as deviation in the UL1950 > standard. You should be looking at the UL1950, 3rd edition, which is > also > harmonized with the Canadian Standards Association and its Electrical > Code. > (Kill 2 birds with one stone!) > > Generally speaking, the UL Listing Mark is for end-use product, such as > coffee pots, computers, and finished things one can generally buy in the > store that perform a function. UL Recognition Marks are for components > and incomplete assemblies that are to be placed inside end-use products, > where their recognition still has to be evaluated in this final > application. > For example, power supplies, such as UPS, electronic load boxes, or desk > type boxes with power cords which are used for test equipment, would be UL > Listed. However, power supplies (transformer/capacitor/choke/etc. > circuitry mounted on a printed circuit card) that are sub-assemblies of > assorted computer products, would be UL Recognized. That means that > this > power supply would be further tested in you end-use product to be sure > that > you are not overloading it, and that you are using it within its rated > specifications. > > You might find the following web sites helpful. > > http://ulstandardsinfonet.ul.com/ > <http://ulstandardsinfonet.ul.com/> > > http://www.ul.com/ <http://www.ul.com/> > > Tania Grant, [email protected] <mailto:[email protected]> > Lucent Technologies, Intelligent Network Unit > Messaging Solutions Group > > > ---------- > From: Jon Keeble [SMTP:[email protected]] > Sent: Wednesday, May 10, 2000 4:05 PM > To: [email protected] > Subject: UL certification and Underwriter Laboratory > > > I work for an Australian company that has always assumed that 'having UL' > means 'having the 'UbackwardsR' mark'. > > The facts as I understand them are > (1) a UL1950 certificate is required > (2) only an NRTL can issue this certificate > (3) The CB scheme was created to allow people in countries like Australia > to achieve accreditation in other countries (including the US) through > their local test house > (4) the mark of any test house qualified to issue a UL1950 certificate is > all that is required > > In our case, there are people in neighboring countries that > (1) participate in the CB scheme > (2) recognize some Australian test houses (none of which can issue UL1950) > (3) are qualified to issue 1950 > > Our marketing department is fearful that not having the 'UbackwardsR' mark > will raise questions in > the mind of prospective customers. > > I'd be very appreciative of some candid feedback. > > > > > ----------------------------- > Jon Keeble > Fairlight > Hardware Engineering Manager > 02 8977 9931 > [email protected] > _________________________________ > > The bounds of Time, Space or Mechanics should never stand > in the way of a perfectly good idea....... > > ------------------------------------------- > 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] > > > ------------------------------------------- > 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] > ------------------------------------------- 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]
