Pool Equipotential Bonding grid placement

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Pool Bonding Issues

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Building a fountain and it doesn't conform to a typical pool standards, so I am having a tough time interpreting the NEC 680.26(b). Note 4 states the the copper grid is shall "Be secured within or under the pool no more than 6" from the outer contour of the pool shell". To me it is unclear what this is trying to state. Say I have a 2' thick concrete liner that creates the limits of the pool, where in that slab is the grid supposed to be place. Is it 6" from the surface of where the water and concrete meet or 6" from where the concrete and the ground meet? Isn't the conductive pool shell defined by where the concrete and water meet? To me the grid is supposed to be 6" from where the concrete and water meet, can anyone clarify is I am correct or not.
 
Can you provide a bit more detail on the presence of re-bar or wire mesh in the liner or perimeter ?
 
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Is this fountain part of a pool? IOW does it share water with a pool? If not it does not need equipotential bonding. Part V of 680 is for fountains
 
The fountain is interactive. I know it needs the equipotential grid, the question is what is considered the outer contour of the pool shell. Is it the interactive surface between earth and concrete or where the water meets the concrete.
 
ground grid for pool

ground grid for pool

Assuming we are talking about an inground pool;When I did a pool rehab years ago the surrounding sidewalk was removed and I installed grid as close as possible to shell of pool. I believe code rationale behind this is that a equal potential is desired when exiting and entering from the water of the pool itself.
 
2 issues

1. equipotential bonding for perimeter surfaces.
2. pool shell bonding

The perimeter bonding must be 18-24" from the inside wall of the pool and must be 4-6" below subgrade. The #8 bare copper conductor must follow the contour of the pool and


The pool shell must be bonded at 4 corners or equally spaced around the pool.

Also all metal parts as well as the pool water must be bonded
 
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