oh well, the guy I know hasn't done refrigeration work in a while. For a while he worked on vending machines, but I guess that was a while back. As far as one side of the line and the meter reading 0 voltage when the switch is closed the only thing i can come up with is that one side of the switch is hot and one side is negative. So when the switch is closed the meter reads 0 volts. I guess that thevevinms, can't spell his name, law is in effect here. Voltage in equals voltage out in any two node points. Oh well, works for me. Whatever!