Greg,
I have seen "stray voltage" problems with pools and the problems have all been with plastic pools. Not metal or concrete pools. The last pool problem with "stray" voltage seemed to come from the neighbors house. The EC was hooking up a pool light and got a shock It was around 30-50 volts (I believe). He knew there was no voltage because he was the only EC on the job. So the EC started to drive 8' ground rods every 10-15' around the pool and thermo weld the ground wires. Once he was on the neighbors side the voltage dropped to 2-5 volts. He didn't go next door to see what was causing the problem though because there were 3-4 houses on that side of the yard.
