Regardless of what you think of the problem I posted I have another question pertaining to what may be the same problem.
Could a cheap "computer store" type of battery backup cause a common to float?
In other words.. If my computer was the only thing in my control panel that was being run from a batter backup could this cause a ground or common to float and create problems? The battery backup unit does get powered by the 3 phase system by way of a stepdown filtered transformer supply.....