Ron,
Yes, this is true. The 1990 National Electrical Code said that equipment electrically connected to a telephone network manufactured after July 1, 1991 must be Listed. The July 1, 1991 date was an extension granted after the 1990 NEC was published because the telephone industry needed more time to get its legacy equipment that would continue to be manufactured Listed. I know this well, because I was hired by AT&T Bell Laboratories in 1989 into a “temporary position” to test such legacy equipment and facilitate NRTL listing until the wave of listings subsided. I am still at that “temporary” position -- the wave never subsided. Regards, Don Gies, N.C.E Senior Product Compliance Engineer Alcatel-Lucent Holmdel, NJ 07733 USA _____ From: Ron Pickard [mailto:rpick...@hypercom.com] Sent: Thursday, May 31, 2007 9:14 PM To: EMC-PSTC@listserv.ieee.org Subject: Re: 'IEC' symbol ?? Hi Rich, As always, you're a wealth of information and I agree with what you're saying and thanks for your reply. BTW, I believe that Article 800-4 was put into the NEC about 1990 when UL1459 came on the scene (anyone know for sure?). That may explain why your plain old telephone is not NRTL listed if it was made before then. Best regards, Ron Pickard rpick...@hypercom.com From: Richard Nute on behalf of rn...@san.rr.com Sent: Thu 5/31/2007 4:06 PM To: Ron Pickard; 'Pete Perkins'; 'Brian O'Connell'; emc-p...@ieee.org Subject: RE: 'IEC' symbol ?? Hi Ron: Who am I to argue with the NEC? Pete's assertion was that any equipment attached to the POWER GRID was required to be certified by a NRTL. The point of my response was intended to say that attachment to the power grid is NOT the driver for whether or not equipment needs to be certified by a NRTL. In the USA, there are two drivers for third-party safety certification of electrical products: 1) OSHA, Sub-part S, which invokes certification by a NRTL. 2) Local electrical code (usually adoption of the NEC). Acceptable certifiers are specified by the local authority having jurisdiction for the local electrical code. So, since the NEC requires "listing for the purpose," then the driver for third-party certification of telephone-connected equipment is the local electrical code. Which may or may not require certification by any NRTL, specific NRTLs, or non-NRTLs. Attachment to the power grid is NOT the driver for NRTL certification. Nor is attachment to the telephone network a driver for NRTL certification. But, for all practical purposes, attachment to the power grid defines what equipment should be certified. And, for all practical purposes, certification by a NRTL satisfies both OSHA and electrical code requirements. And, as you have pointed out, for all practical purposes, attachment to a telephone network defines what equipment should be NRTL-certified. (My plain old telephone does not have a UL or equivalent mark.) Okay? Best regards, Rich From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Ron Pickard Sent: Thursday, May 31, 2007 3:51 PM To: ri...@ieee.org; Pete Perkins; Brian O'Connell; emc-p...@ieee.org Subject: RE: 'IEC' symbol ?? Hi Rich, You wrote: "...For example, laptop computers do not attach to the power grid, although their external power supplies do attach to the power grid. OSHA rules do not require a laptop computer to be certified by a NRTL, but the external power supply must be certified by a NRTL." Your statement would be true with laptops w/o analog modem ports, however, Article 800-4 of the NEC states: "800.4 Equipment. Equipment intended to be electrically connected to a telecommunications network shall be listed for the purpose." I am sure that most of us are already aware of this requirement. I just thought I'd mention it. Best regards, Ron Pickard rpick...@hypercom.com ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to emc-p...@ieee.org Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas emcp...@ptcnh.net Mike Cantwell mcantw...@ieee.org For policy questions, send mail to: Jim Bacher: j.bac...@ieee.org David Heald: emc-p...@daveheald.com All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
