Nick wrote: >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.
Depends upon what you mean by ground? I've had many products approved with several ground wires connected to one stud. Now, that's one PRIMARY ground with several SECONDARY grounds on top. The only requirement there being the primary was on the stud first with its own locking nut. Then, the secondaries stacked on top each with their own locking nut. This allows secondaries to be removed keeping the safety primary ground connected. The only limit, in my opinion, is that each secondary ground wire be checked with the ground current test seperately. As far as stacking multiple PRIMARY grounds on one stud as in the case of redudant mains input, I don't think it can be done. The intent being redundancy and that intent being violated by a non-redundant grounding scheme. I think the GR-1089 standard is addressing multiple primary grounds on a single stud. I don't believe 1089 prohibits a single primary and multiple secondaries. I could be wrong about this, but I've never had a problem with stacking a single primary on a stud with multiple secondaries. Regards, Doug McKean _________________________________________________________________ The new MSN 8: advanced junk mail protection and 2 months FREE* http://join.msn.com/?page=features/junkmail 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: [email protected] with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: [email protected] Dave Heald: [email protected] For policy questions, send mail to: Richard Nute: [email protected] Jim Bacher: [email protected] 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
