Maintguy,
I liked your battery example until you said that if you didn't ground the center point of the batteries, you would still get 1.5 volts to ground. I don't believe that to be the case.
Cindy,
There is no current path because the secondary is isolated from the primary. Where would the electricity flow to when you ground a midpoint of a secondary if no other line is also connected to ground? Nowhere, because there is no way for it to get back to the secondary windings, until a second line is grounded through an unintentional ground fault.
The resistance grounded systems don't conduct to ground either, unless there is a second, unintentional ground fault. The resistor then limits the current flow to ground to minimize equipment damage, but allows enough current to flow to operate protective devices.
Correct, anyone?
[This message has been edited by Redsy (edited 12-23-2001).]
