electrical as a source of X10 issues

[Warren Whiteside]

George, that is really good news at what the utility guys found. I think 
we can be sure that your own ground is a goodie. That ground actually is 
needed to balance the single phase of 230 VAC we all buy as it is the 
center tap of a drop down transformer. (4160? to 230 VAC) Your ground 
was actually acting as the Neutral (or center tap) via what is sometimes 
called the phantom system (ground being common) The power company bore 
responsibility for this end of the incoming service and the loose 
terminals is an illustration of my comments concerning terminating 
aluminum wire. (expansion and contraction) Did they also check at your 
panel lugs on your Main breaker as a courtesy?

  Warren