Randy, I find this subject extremely interesting. Could you tell me how one goes about listing a product to UL 1950/CSA 950 3rd Edition if the product violates many of the clauses. My understanding was that a product had to meet all the criteria as stated in the standard in order to obtain a listing. Am I wrong? How would one get a listing if UL1950 states that creepage must be >1.5mm and the connector creepage is say only 1.0mm. Are these deviations published somewhere? Do other NRTL's other than UL do this?
This is truly something totally new to me! I want to hear more! Jim Jim Wiese Regulatory Compliance Engineer ADTRAN, Inc. 205-963-8431 205-963-8250 FAX jim.wi...@adtran.com >---------- >From: Randolph Ivans[SMTP:iva...@ul.com] >Sent: Tuesday, January 27, 1998 2:22 PM >To: nebs@world.std.com >Cc: Thomas Lanzisero >Subject: re: telco spacing, listings, etc. > >UL has a category called "Communication Service Equipment" which is >specifically intended to address utility owned and operated equipment. The >category makes allowances for special installation practices, locations of >equipment, etc. that would allow variations from the traditional >UL1950/UL1459 requirements which are intended for more general >applications. Right now, the base-line requirements are either UL1459 or >UL1950 with consideration given to various Bellcore GRs as well as the NESC >and some international specs like the CCITT K series recommendations. These >additions typically cover environmental, grounding and surge issues. > >I have not heard (up until now) of any serious concerns with the passing of >UL1459 in the year 2000 and have been planning to shift over to UL1950 the >same as the categories for ITE and Telephone Equipment. In the past I have >made it known at TIA meetings that it would be possible to keep or evolve >UL1459 into a standard more dedicated to US only telecom but there was >never any interest expressed. Another approach might be to integrate some >of the UL1459 concepts (like dielectrics instead of spacings) into a >Communication Service Equipment standard that still uses UL1950 as a base >but with some special considerations for US service provider applications. > >Randy Ivans >Business Sector Coordinator >Telecommunications Industry >email: iva...@ul.com > >
