Originally posted by electure:
Redsy, would there be any difference?
Here's another. On starters using grounded control circuits (120V), it's standard operating procedure for the grounded side to be run through the O/L contact (switching the grounded conductor). Isn't this a violation?
Probably not, just a matter of conventional procedures, or so I thought.
I would say that the true switching is done on the ungrounded side of control xfmr. by the control devices. The switching done by opening the OL relay is really not switching, per se. And besides, on 3 wire control, this drops out the coil, which will open the aux. contacts, and disconnect the ungrounded side, as well.
