Ok Vic, you've got my full attention. I need your help and your well known expertise in these matters. I have a problem with "... Central Office equipment needs no regulatory approval in North America ..." It's been my understanding and maybe wrongly so that the application of UL-1950 (at least here in the US) comes from, if I remember correctly, CFR 1910 (CFR = Code of Federal Regulations, i.e. federal law) about equipenmt in the workplace needing approvals and labels from an NRTL. That workplace to include CO's, etc ...
I do not have this particular CFR with me, but having had a similar discussion with some people about this very point several years back. Could you or anyone else please provide whatever it is that directs the APPLICATION of UL-1950 to the conclusion that "... Central Office equipment needs no regulatory approval in North America ..."? If I'm way off the mark, don't hold any punches. Tell me, then show me where to look. But, if it's an interpretation, I really need to read how, when and where UL-1950 is applied. I thought I knew, but obviously I don't. Regards, Doug Victor L. Boersma wrote: > > > Jim you are not quite right. > > There is a lot of protection and separation that are defined in NEBs and > > NEDS standards. > > Those are incorporated into the equipment that is installed in a central > > office. > > Very true, but Central Office equipment needs no regulatory approval in > North America and UL1950/CSA950/IEC60950 do not apply, except where the > customer asks for it. Many Operating Companies accept compliance with > the Bellcore requirements. Some now start insisting on certification by a > NRTL, if: > (a) The service provider is not a public utility (many resellers and LD > providers are not) > (b) The equipment is not deployed on the contiguous property of a public > utility.) > > Ciao, > > Vic
