Doug,So to clarify are you saying that it is acceptable in the scenario I gave that the ground from modules 2 and 3 can go to the Wago terminal block rather than the ground stud?Sent from my Verizon, Samsung Galaxy smartphone -------- Original message --------From: Douglas Nix <[email protected]> Date: 6/18/19 6:00 PM (GMT-05:00) To: Steve Brody <[email protected]> Cc: IEEE EMC PSTC <[email protected]> Subject: Re: [PSES] Grounding Steve,I agree, you need a positive bonding connection back tot he PE point.The WAGO terminal are excellent. They have some spectacular test videos on their web site showing the effects of overcurrent on their terminal blocks, and I have personally found them to be highly reliable in some demanding applications.You will find that the Wago products conform to IEC, UL and CSA requirements. Some types you can even buy at Home Depot these days, if you’re in a pinch, however, I’ve never seen the grn/yel bonding terminals there. --Doug [email protected]"To begin with the end in mind means to start with a clear understanding of your destination. It means to know where you're going so that you better understand where you are now so that the steps you take are always in the right direction." – Stephen R. Covey, The Seven Habits of Highly Effective People
On 18-Jun-19, at 14:38, Steve Brody <[email protected]> wrote: 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] - ----------------------------------------------------------------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.htmlAttachments 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]> - ---------------------------------------------------------------- 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]>
