Okay gang- I rarely see a permanently installed swimming pool that is installed above ground. Here's the picture, vinyl liner, and steel wall with support members around the perimeter. The question that come up is: do I need a "Perimeter Surface grid" extending out 3 feet from the pool. If I do, what would be acceptable? If I understand correctly, and that might be the problem, the purpose of the perimeter surface grid is for the people setting on the edge of the pool and dangling their feet in the water exposing their bod to a difference of potential. Pretty hard to do with an above ground pool.
I haven't seen an above ground pool without a deck and we are just dabbling with the 08 but ...
The comment from the handbook
The requirement for bonding perimeter surfaces now applies to paved and unpaved surfaces. An example of an unpaved perimeter surface would be the lawn surrounding a permanently installed aboveground swimming pool.
So it looks like an 8ga copper, tied to the pool shell 4 places equally spaced around the pool.
Here the AHJ has understood the easing of the grid requirements (from 05 to 08) to mean that the grid need not be copper, that ordinary steel reinforcing mesh is enough - even if there's no concrete, just pavers of grass.
The last talk I had with Suzanne, she said that under the '08 code, you will still need the bonding grid even if it is just dirt/grass. Now granted under the '08 it doesn't have to be that 12" X 12" copper grid. A single #8 cu wire will be OK.
The last above ground pool I looked at had NO metal parts. The upper and lower track, and uprights, etc. were all made of plastic. NOW is that bonding ring required?
Ironically, the problem is CAUSED by non-conductive pool shells. Specifically, the PVC molded, and PVC-coated steel shells.
It is the insulating nature of the shell that allows a voltage potential to develop. What it seems we are trying to accomplish is the bonding of the pool water to the ground around the shell.
Harold, I think you mis-read my post. I did not say the grid was not required ... I said it was no longer required to be made of #8 copper. You can use ordinary steel reinforcing mesh to make the grid.