I am in portland . 30 to 40 v ac I read between water pipe _ which is real ground and ground on the outlet pin that has cylindrical shape. Is this normal?
On Mar 23, 2018 4:03 PM, "Chris Albertson" <albertson.ch...@gmail.com> wrote: > Aram, > > Where to you live? In North America, UK, ....? > > Building wiring conventions are different in different places. but in > general your system, taken as a whole needs to be connected to exactly ONE > ground reference. No more no less. The best way to place a bolt some > place and define that is "The Ground" > > If you have 30+ volts AC on a ground pin on an outlet you have a problem > that needs to be looked at by a good electrician. It should never be that > high. Some cases are thinks like corosion and loose connections. One > cause I that think of is that in some older buildings they were allowed to > use metal conduit as the ground connection. Works OK at first but meta > conduit rusts ofter time. Now day we are required to pull a group cable > > On Fri, Mar 23, 2018 at 2:04 PM, a k <pccncmach...@gmail.com> wrote: > > > hi > > i reassemble my lcnc mill, and i found that axis move by them self. > > i think it is something to do with static electricity. > > i found ground - and when grounded lcnc body of machine - breaker turn > off. > > i measure with dc voltage between machine and ground 2. vdc and when i > > measure ac voltage between lcnc machine and ground it was 35 v AC. > > > > i know that when use real ground like a water pipe and ground in outlet > > there always will be current they always be 30 v ac. > > can it cause problem? > > > > thanks > > aram > > ------------------------------------------------------------ > > ------------------ > > 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 > ------------------------------------------------------------------------------ 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
