Re: stray voltage
Take a blank piece of paper. Draw a pool in the center of the paper, then draw the parts, such as a ladder, diving board, fence, etc... Now draw a line between all of the parts (the line represents the bond wire), this will connect all of the parts and make them of equal potential.
Stray voltage can come from a neighbor's property, the utility, maybe a lightning storm miles away. As the stray voltage passes through your pool area, it may raise the voltage level of the area. As long as the equipotential plane is properly installed, the raised potential will not affect people in the pool area, as like the bird on a line there will be no potential difference in the pool area that can cause problems.
Pierre