About 13 years ago I problems at a inground pool that was installed some time in the late 30's early 40's. We found 105 volts to ground in the water in the area of the pool light. This was mesured with a fluke meter with 1 led droped in the water and the other connected to a ground post that was stuck 1 foot into the ground 25 foot from the pool light. As the probe was lowered in to the pool the voltage went up to the 105 reading. So we disconnected the wiring to pool light with no change. Then we disconnected the pipe to the pool light and still no change. We then disconnect the wiring and pipe for the pool pump motor with no change. Finaly we disconnected the service and conductors and still had 105 volts. At this point we called the power company in the area which sent a trouble crew to the site. After 2 days of testing we never did find the problem but we got it corrected.........The power company replaced the transformer that supplyed the power to the site, which was located about 500 foot from the pool up the bank on a rough rock ledge, and then they regrounded the same. At that point we had reconnected everything for the pool, pool house and service and checked for stray voltage which was no longer any where to be found. One of the line men said that it must be a "wild cat" from that old transformer but who knows. Well the stray voltage went away when the old transformer did so I belive the police call that a clue.