> -----Original Message----- > From: Brian May [mailto:bri...@diezorlich.com] > Sent: Friday, November 11, 2011 7:12 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] 3 phase power > <snip> > > What is meant by "bonded to the ground"? Does that mean > connecting the nuetral leg of the transformer to the ground? > If so, why use the transformer at all when i can just go > from a leg to ground? >
Using the safety ground as a path for the return current instead of using a neutral is not safe because, if the connection between the machine and the safety ground should be loose or fail, then the entire frame of the machine will become electrically hot with respect to the naturally occuring grounded objects nearby. It is also a violation of electrical code and will result in failed safety inspections and rejection of insurance claims if problems are traced to using safety ground as a neutral substitute. Steve Stallings ------------------------------------------------------------------------------ RSA(R) Conference 2012 Save $700 by Nov 18 Register now http://p.sf.net/sfu/rsa-sfdev2dev1 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
