Many years ago a TUV Engineer drummed into my head "the only acceptable way" to make protective earth bonds was chassis > star > ring lug > star > nut for ground studs pressed into the chassis.
On Fri, Aug 10, 2018, 9:54 AM Scott Xe <[email protected]> wrote: > Hi Rich, > > > > Thanks for your advice! 😊 Regarding the flat washer, can it be the flat > ring lug of the connecting wire instead? > > > > Between the screw head and the metal enclosure, do we need a flat washer? > That is to say: screw head -> flat washer -> metal enclosure -> on other > side of metal enclosure with paint removed in the contact area with the > flat ring lug -> flat ring lug of the earthing wire -> split ring lock > washer -> plain nut to establish a good electrical earth connection. > > > > Thanks and regards, > > > > Scott > > > > Sent from Mail <https://go.microsoft.com/fwlink/?LinkId=550986> for > Windows 10 > > > > *From: *Richard Nute <[email protected]> > *Sent: *Friday, 10 August 2018 03:11 AM > *To: *[email protected] > *Subject: *Re: [PSES] External toothed star washer used in earth > connection > > > > > > "The lock washer should not interface between the bolt head and the metal, > the lock washer should be between the head and a flat washer." > > > > That locks the bolt to the flat washer so they turn together. 😊 > > > > Establishes a good electrical connection between the bolt and the flat > washer! 😊 > > > > Rich > > > > > > - > ---------------------------------------------------------------- > > 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) <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]> > 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) <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]> > 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]>
