HI Dave, The problem comes in when some devices ground the DC to the frame internally. I don't see an issue with grounding the DC bus bar to earth ground at one point. I'm just looking at "standard practices" which all suggest no connection or at only one spot. Thanks John
> -----Original Message----- > From: Dave Cole [mailto:linuxcncro...@gmail.com] > Sent: July-12-18 1:26 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Grounding > > Normally, a single ground point is established in the cabinet and all of > the grounds tie to that one point. > > The same point is also tied power line ground. > > The multi hole bus bars they sell for use in a AC power breaker boxes > work well for this. > Every big box home store will have a selection of them. > > I screw that to the panel back plane and run all of the ground wires to > that block.� That grounds the steel panel, backplane, and everything in it. > The incoming power ground wire is also connected to the same bus bar. > > Dave > > On 7/12/2018 3:12 PM, John Dammeyer wrote: > > Is it standard practice to connect the DC Servo and DC Instrumentation Bus > > to the machine frame ground which is connected to power line earth? Or > is > > it more normal practice to keep the DC isolated from the 'earth' ground. > > > > John > > > > > > > > ------------------------------------------------------------------------------ > > 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 > > ------------------------------------------------------------------------------ > 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 ------------------------------------------------------------------------------ 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
