Thank you. Well said. John Dammeyer
> -----Original Message----- > From: John Kasunich [mailto:jmkasun...@fastmail.fm] > Sent: January-01-16 4:41 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Rewiring the BP ... > > Three phase or single phase doesn't matter. When a transformer delivers > power at 120VAC one side is grounded. There are a few very limited > exceptions in the code, such as: > > A control circuit derived from a transformer with a primary not > over 1000 volts need not be grounded if: > (1) only qualified persons will service the installation, > (2) continuity of control power is required, and > (3) ground detectors are installed on the control circuit. [250-21] > > Some more detail at: > http://www.ecmag.com/section/codes-standards/motor-control-circuits- > ground-or-not-ground > > > -- > John Kasunich > jmkasun...@fastmail.fm ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
