Penny, This is only partially correct. See the 5th bullet item in R9-11 of section 9.7.1 of Telcordia GR-1089-CORE issue 3.
"Multiple bonding or grounding conductors shall not be secured by the same bolt and shall not need to be removed to perform other service or installation procedures. It is permissible to connect other bonding or grounding conductors to a grounding connector provided a reliable bond between the connector and the equipment is not disturbed during the installation, service or maintenance." This means if a product has a grounding post, the main protective earth connector can be installed with nuts and lock washers for instance, and then another ground connection can be made to the same stud provided it does not loosen the original protective earth connection. In essence what it is saying is that two ground connectors cannot be connected unless separate fastening devices are used between each. In addition the primary protective earth connection cannot be disturbed by the secondary earth connection. This also allows a bolt on the inner side of an equipment chassis to be connected to say the PCB ground, while the same bolt on the outside of the chassis is connected to a wire that eventually attaches to the frame. Jim Jim Wiese NEBS Project Manager/Senior Compliance Engineer ADTRAN, INC. 901 Explorer Blvd. P.O. Box 140000 Huntsville, AL 35814-4000 256-963-8431 256-963-8250 fax jim.wi...@adtran.com From: Robbins, Penny D. [mailto:probb...@telcordia.com] Sent: Wednesday, July 30, 2003 11:56 AM To: emc-p...@majordomo.ieee.org Subject: RE: Number of Terminations on a Ground Stud? Telcordia's GR-1089 limits the number to ONE per stud. From: Momcilovic, Nick [mailto:nick.momcilo...@qtiworld.com] Sent: Wednesday, July 30, 2003 12:03 PM To: emc-p...@majordomo.ieee.org Subject: Number of Terminations on a Ground Stud? Is anyone familiar with any requirement that limits the number of ground terminations on a single stud? I heard that the limit is two per stud but I was not able to confirm this with any of the standards we have. Thanks in advance for your help. Sincerely, Nick Momcilovic Product Safety Quad/Tech, Inc. A Subsidiary of Quad/Graphics Sussex, Wisconsin 414-566-7915 phone 414-566-9576 fax nick.momcilo...@qtiworld.com www.qtiworld.com This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: emc_p...@symbol.com For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org Archive is being moved, we will announce when it is back on-line. All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
