Al,
If the neutral was lost at the 2nd house I doubt they would even notice because the unbalanced current would flow through the waterpipe underground, and through the interior of the first house to the point where that service is bonded and then out on that Houses' neutral back to trans.
Is this making sense?
I also figure that current would regularly be flowing back and forth on this pipe (as a parallel pathway) in quantities and 'direction' dependant on the differences in load between the structures at that time.
Bill
