To all who provided a response to my grounding question as expected the expertise was excellent and very helpful.
Thanks again, > On June 19, 2019 at 2:52 PM Pete Perkins > <[email protected]> wrote: > > > Steve, You have received many good comments focusing especially on the > rational provision of earthing/grounding including under 60204-1. > > > > It is not clear as to which specific argument will > persuade the customer however, perhaps you can get some movement to agreement > by providing the CE pedigree (VDE or whoever) along with specifics about the > adequacy of using the DIN rail earthing/grounding from an authoritative > source which they will accept. The DIN rail manufacturer should be helpful > in supporting this application. > > > > :>) br, Pete > > > > Peter E Perkins, PE > > Principal Product Safety & Regulatory Affairs Consultant > > PO Box 1067 > > Albany, Ore 97321-0413 > > > > 503/452-1201 > > > > IEEE Life Fellow > > [email protected] mailto:[email protected] > > > > Entropy ain’t what it used to be > > > > From: Nyffenegger, Dave <[email protected]> > Sent: Tuesday, June 18, 2019 12:21 PM > To: [email protected] > Subject: Re: [PSES] Grounding > > > > Steve, I don’t recall EN 60204-1 requiring a central earthing point, > disallowing daisy chaining of the protective bonding circuit. My copy is > with 2009 amendments. Is there a newer version with this requirement? NFPA > 79 2015 is harmonized with EN 60204-1 and I don’t think there is such a > requirement in there either. > > > > The use of the screw-less DIN rail terminal blocks for protective bonding > connections should be fine if that is their intended purpose and they are > NRTL approved or (for outside NA) CE marked to a standard allowed by EN > 60204-1. > > > > -Dave > > > > From: Steve Brody [mailto:[email protected]] > Sent: Tuesday, June 18, 2019 2:39 PM > To: [email protected] mailto:[email protected] > Subject: [PSES] Grounding > > > > HI all, > > > > I have a client with whom I am having a discussion about grounding for an > EN 60204-1 product. The product consists of 3 sub-modules all of which use > mains power derived from the first module where the external mains comes into > the unit. > > > > In the first module the ground from the branch circuit goes to a ground > stud, lockwasher and nut, and from there a ground wire goes from the stud to > a DIN rail mounted Wago terminal block designed for grounds, as it is > green/yellow in color, which is screwless and uses spring pressure to secure > the wire in place. Other internal grounds in this module also connect to > this block. > > > > The second module receives the main ground from the first module in a > similar arrangement, and the third module gets it's ground from the second > module. > > > > I have pointed out to my client that, in accordance with all safety > standards I am aware of, and a figure in EN 60204-1 on grounds, that modules > 2 and 3 must have ground leads that goes back to the point where the main > ground comes into the unit originally, and not daisy chained from module to > module. > > > > I don't think there is anyone who will disagree with this but I did say I > would ask the question. Second question is do you thin there is a problem is > using a screwless pressure connector for the grounds, as opposed to a > stud/lockwasher/nut? > > > > Thoughts and comments would be appreciated by reply to his or privately > at [email protected] > https://connect.xfinity.com/appsuite/[email protected] > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected] mailto:[email protected] > > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site > at http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) http://www.ieee-pses.org/list.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected] mailto:[email protected] > > Mike Cantwell <[email protected] mailto:[email protected] > > > For policy questions, send mail to: > Jim Bacher <[email protected] mailto:[email protected] > > David Heald <[email protected] mailto:[email protected] > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected] mailto:[email protected] > > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site > at http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) http://www.ieee-pses.org/list.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected] mailto:[email protected] > > Mike Cantwell <[email protected] mailto:[email protected] > > > For policy questions, send mail to: > Jim Bacher <[email protected] mailto:[email protected] > > David Heald <[email protected] mailto:[email protected] > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. To post a message to the list, send your e-mail to > <[email protected] mailto:[email protected] > > > All emc-pstc postings are archived and searchable on the web at: > http://www.ieee-pses.org/emc-pstc.html > > Attachments are not permitted but the IEEE PSES Online Communities site > at http://product-compliance.oc.ieee.org/ can be used for graphics (in > well-used formats), large files, etc. > > Website: http://www.ieee-pses.org/ > Instructions: http://www.ieee-pses.org/list.html (including how to > unsubscribe) http://www.ieee-pses.org/list.html > List rules: http://www.ieee-pses.org/listrules.html > > For help, send mail to the list administrators: > Scott Douglas <[email protected] mailto:[email protected] > > Mike Cantwell <[email protected] mailto:[email protected] > > > For policy questions, send mail to: > Jim Bacher <[email protected] mailto:[email protected] > > David Heald <[email protected] mailto:[email protected] > > - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
