Class I and II refer to classes of equipment and types of insulation. Consult the definitions section under "General" in UL1950.
Catherine Pell Advanced Computer Communications (ACC) At 11:13 AM 5/15/96, [email protected] wrote: >If my memory serves me right, the term used to be applied to air filters. The >Class 1 or Class 2 had to do with the amount of smoke which would be generated >when a flame was applied to the filter. I think that a Class 1 filter had a >metal frame and element and Class 2 had non metal, but again that's from what >I recollect from years back, dealing with UL 478 which I believe had >references >to Class 1 and 2 filters. > >Gabriel Roy >Hughes Network Systems >MD > > >----------------------------------------- snip >--------------------------------------------------- > >Does anyone know what is meant by the term : system shall have a >minimum fire rating of UL CLASS 2? > >Fred Schumacher >Unisys Corp >
