The times of the UL monopoly are indeed over in certain product categories. However there are still retailors, distributors, end product manufacturers who insist upon the UL mark. Referring to the original question, at issue was the purchase of a power supply.
If the end product equipment manufacturer knows that any NRTL certification will suffice, then it is correct to say that the power supply can be NRTL certified. But if the certification requirement of the end product : is not known, is UL Certification, changes as distributors change, it is highly recommended that the power supply be UL recognized. The reason is UL will not necessarily accept certifiable components which are certified by Labs other than UL. On the other hand NRTLs other than UL, doing end-product evaluations will accept UL recognized components. For component vendors supplying end product manufacturers who are or may be required to obtain UL Listing Marks, the times of the UL monopoly are not quite over. Regards. ---------- > From: Matthias R. Heinze <[email protected]> > To: rlanz <[email protected]>; [email protected] > Subject: RE: Who's responsibility..... > Date: Friday, August 14, 1998 12:25 PM > > I believe that Rich Lanzillotto wanted to say "NRTL" where he said "UL" > under 1., the times of the UL monopoly are over. > Under 2. the power supply manufacturer can hardly claim such compliance, if > anything maybe compliance with the conductive immunity and emission > requirements. Even that is negated if you add circuitry and the housing. I > would simply go for a complete retest. > > Matthias R. Heinze > TUV Rheinland > > > -----Original Message----- > From: [email protected] > [mailto:[email protected]] On Behalf Of rlanz > Sent: Wednesday, August 12, 1998 2:52 PM > To: [email protected] > Subject: Re: Who's responsibility..... > > > 1, If your objective is to obtain NRTL certification on your system, I > would not purchase a supply unless it was UL listed or recognized. The UL > mark would be accepted by any NRTL you submit your system to. Otherwise > you would have to be responsible for the safety compliance of the supply, a > nearly impossible task. > > 2. As for FCC if the vendor claims of EMC Directive compliance includes > conforming with harmonized emission standards like En 55022, then I think > this could be OK. I would recommend you have a preliminary scan taken at a > test lab however. Also the vendor should provide you with his Declaration > of Conformity listing the evaluation standards. > > Regards > Rich Lanzillotto > [email protected] > Regulatory Consultant > ---------- > > From: Wismer, Ronald S. <[email protected]> > > To: 'EMC Forum' <[email protected]> > > Subject: Who's responsibility..... > > Date: Tuesday, August 11, 1998 11:20 AM > > > > Our company(In the US) wishes to purchase an AC/DC power supply from > > an outside vendor(From overseas). We then, plan to add some fusing > > circuitry, an enclosure, and a terminal block so that it mechanically > > meets our needs. The vendor claims to meet the EMC and LV directives, > > but no claims to FCC approval. Our market of interest is the US only, > > thus the problem. > > > > My question is, if the vendor can not produce proof that that they > > tested to, and comply with, the FCC requirements, is it allowable for > > our company to qualify the device and label it accordingly? Are there > > any risks involved in doing so? > > > > I appreciate any comments. > > > > Sam Wismer > > LXE, Inc. > > > > --------- > > This message is coming from the emc-pstc discussion list. > > To cancel your subscription, send mail to [email protected] > > with the single line: "unsubscribe emc-pstc" (without the > > quotes). For help, send mail to [email protected], > > [email protected], or [email protected] (the list > > administrators). > > > > --------- > This message is coming from the emc-pstc discussion list. > To cancel your subscription, send mail to [email protected] > with the single line: "unsubscribe emc-pstc" (without the > quotes). For help, send mail to [email protected], > [email protected], or [email protected] (the list > administrators). > > --------- This message is coming from the emc-pstc discussion list. To cancel your subscription, send mail to [email protected] with the single line: "unsubscribe emc-pstc" (without the quotes). For help, send mail to [email protected], [email protected], or [email protected] (the list administrators).
