On Sat, 15 Oct 2011 14:00:54 -0400 gene heskett <[email protected]> wrote: > On Saturday, October 15, 2011 01:43:50 PM [email protected] did opine: > > > Here is our ground wiring.. (lower left hand corner of box. - yes it is > > messy) > > > > http://electronicsam.com/images/KandT/conversion/groundwiring.jpg > > > > sam > > I've done worse myself that worked ok. > > The long bus bar does bother me a wee bit, particularly if the are > relatively high current devices landing a ways up the buss from that shop > made bar connecting the bus bar to that plate the incoming green marked > static cable is connected into.
That assembly is actaully taken out of a service breaker box. > > But lets start at the top of it, with all the supply breakers open, and > disconnect each of the green wires in turn to check the ohms from the > disconnected wire to the big plate. I would investigate anything less than > say 15 ohms because it is getting a ground someplace else besides where it > is intended. > > What is in that woven shield under the left flange? That also should be > kept away from box contact except a jumper to the bus to ground it. All the original 'logic' wiring (limits/sensors) was run in that shield. I don't know if they just thought the paint was enough to keep it from touching any of the case or what. that is run all over the machine. >So if > you have a ground jumper from it to the bus bar, disconnect the jumper and > check it too. You may have to wiggle it around a bit I insert a layer of > scotch 88 between it and the box, and some of that nylon hole edge liner > where it goes through holes in the box, that and make sure it is not being > used as a ground at the far end of it. No shielding should be connected > anyplace but at this bus. > > Keep us posted on what you find Sam, please? It would be a neat test - When I get a chance I will measure them. > > Cheers, Gene > -- > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > Never offend people with style when you can offend them with substance. > -- Sam Brown, "The Washington Post", January 26, 1977 > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2d-oct > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2d-oct _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
