The safety grounds like that, those wires bolted to cover plates, Are important if there is mains power inside the device. But they do nothing with regards to the operation of the device or noise on the data lines. Those grounds are best thought of as part of the mechanical enclosure. Those safety grounds do nothing at all until one day there is a fire and some insulation melts.
On Mon, Jul 16, 2018 at 9:39 AM Dave Cole <linuxcncro...@gmail.com> wrote: > On 7/13/2018 12:05 PM, andy pugh wrote: > > On 13 July 2018 at 16:52, Dave Cole <linuxcncro...@gmail.com> wrote: > > > >> That's pretty much standard these days. > >> > >> I'm not making this stuff up. That's how its done. > > I think that there is still some confusion out there. I used to work > > for a company making specialist test equipment (brake dynos, motor / > > pump testers, that sort of thing). > > Our electricians were convinced that everything needed an yellow/green > > earth connection. Every panel for the control cabinet, the doors, the > > individual devices bolted to the machine bed. We would spend ages > > making things look nice and painting them, and then they would come > > back festooned with stripy wires and with a hole drilled in every > > separate metal part for the earth stud. > I know exactly what you are talking about. This can certainly be > overdone. > > I think the problem is that people are afraid of what will happen if > they don't run ground wires. > The question is always; If I don't run a ground wire to it will it > make it unsafe. > Most electricians (who are oftentimes paid by the hour) are happy to > make the system "really safe" by running more ground wires. > > Dave > > > ------------------------------------------------------------------------------ > Check out the vibrant tech community on one of the world's most > engaging tech sites, Slashdot.org! http://sdm.link/slashdot > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
