Pool Bonding Grid behind or in front of Gypsum Board?

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NicSparks322

Member
Location
Wyoming
Occupation
Journeyman Electrician
I am currently working on an addition where the homeowner is adding an in floor pool as well as a cold plunge. I did the bonding grid all around both pools. Two side of the pool are against the wall. They are going to be putting marble on the walls. They have to install a gypsum board to hold the mortar and marble slabs.
My question is, does the bonding grid need to be installed in front of the gypsum or is it okay how I have it? It is currently behind the gypsum board stapled to the wood studs.
Thanks!
 
Not even sure that a wall would require a bonding grid, especially constructed as you describe. It would serve no purpose stapled to the studs behind the sheetrock, that's for sure.

-Hal
 
Per 2020 cycle Not sure what you are on

680.26(B)(4 &5)
(4) The copper ring conductor is placed between 18 in. and 24 in.
from the inside walls of the pool.
(5) The copper ring conductor is secured within or under the perimeter
surface 4 in. to 6 in. below the subgrade.
.
So, it be should under the studs. Not at same height or above.
I'm assuming they are wood as you were able to staple. If they were steel studs, you have to bond them.
 
NicSparks322 said:
I am currently working on an addition where the homeowner is adding an in floor pool as well as a cold plunge. I did the bonding grid all around both pools. Two side of the pool are against the wall. They are going to be putting marble on the walls. They have to install a gypsum board to hold the mortar and marble slabs.
My question is, does the bonding grid need to be installed in front of the gypsum or is it okay how I have it? It is currently behind the gypsum board stapled to the wood studs.
Thanks!
Click to expand...
I don't think that there is anything that requires the bonding on non-conductive wall surfaces.
 
don_resqcapt19 said:
I don't think that there is anything that requires the bonding on non-conductive wall surfaces.
Click to expand...
According to the inspector, it needs to be 3' up the wall. The pool is right up against two walls. Ive looked all over the code book and I can't find anything that says bonding up the wall. The only thing that makes sense to me is that because I can't do 3' around those two walls, you have to go up the wall. If any one knows the reference, please let me know. This also might be just the AHJ's recommendation.
 
Mystic Pools said:
Per 2020 cycle Not sure what you are on

680.26(B)(4 &5)
(4) The copper ring conductor is placed between 18 in. and 24 in.
from the inside walls of the pool.
(5) The copper ring conductor is secured within or under the perimeter
surface 4 in. to 6 in. below the subgrade.
.
So, it be should under the studs. Not at same height or above.
I'm assuming they are wood as you were able to staple. If they were steel studs, you have to bond them.
Click to expand...
We are on the 2023 code. Two of the walls are right up against the pool. I'm assuming because I can't do the 3' around it, the AHJ said to go up the wall.
 
NicSparks322 said:
We are on the 2023 code. Two of the walls are right up against the pool. I'm assuming because I can't do the 3' around it, the AHJ said to go up the wall.
Click to expand...
OK. 2020 and 2023 do not differ in regard to section 680.26(2)

(2) Perimeter Surfaces. Equipotential bonding for the perimeter
surface must extend a minimum of 3 ft horizontally from the inside
walls of a pool where not separated by a building or permanent wall
5 ft in height.
Perimeter surfaces less than 3 ft separated by a permanent wall or
building 5 ft or more in height require equipotential bonding only on
the pool side of the wall or building

The code says the bond wire must be 4"-6" below the subgrade.
I am going to assume having it stapled, as you said, above the subgrade, the bond wire is not going to be effective. I'm certainly not an electrical engineer but being set in the subgrade is purposeful.

I built an indoor pool (concrete) a couple of years ago. Existing interior walls in the house. I squeezed this pool into the space. At least 2 locations I recall were less than 3' from the wall. I ran the bond wire around the perimeter close to the wall in the subgrade. The inspector was great guy and very informative. I too had a question about its location. That section clarified it.
 
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