From: "Eric Petitpierre" <[email protected]>
Subject: Re[2]: UL 1950 3rd, and IEC 950
Doug,
CFR 1910.302 (a)(2) (iv) provides the exemption for communication
utilities.
CFR 1910.399 (a)(1) has alternate methods of compliance to the NRTL
Mark, such as " installation or equipment of a kind which no
nationally recognized testing laboratory accepts.." and "..custom-made
equipment.."
Eric Petitpierre
Pulsecom
Herndon, VA
[email protected]
______________________________ Reply Separator _________________________________
Subject: Re: UL 1950 3rd, and IEC 950
Author: [email protected] (Douglas Mckean) at SMTP
List-Post: [email protected]
Date: 4/29/98 11:11 AM
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
