What Kind Of Bonding For This Hot Tub?

3

3oFElectric

Member
Location
Tennessee
Occupation
Electrician
I have a client who is getting a hot tub delivered under a pergola in the back yard.

The hot tub is going to sit in the center of the pergola on a poured concrete slab. In the picture you can see where they've framed in the center where the hot tub is going to sit.

I know I'll have to bond the metal posts supporting the pergola roof around the hot tub, but what about the surface of the pergola flooring? It's made of a non conductive vinyl or PVC material.

Also, just to clarify I know that per 680.42(B) I'm not required to provide equipotential bonding if the rim of the hot tub is 28 inches or higher above the perimeter surface.

I'm asking only because I'm not sure what the height of the rim of the hot tub to the perimeter surface will be after they pour the slab. It may be less than 28 inches, in which case how would I bond the pergola flooring, also considering it's non conductive?


IMG_7158.jpg
 
It appears that the slab for the tub will be at the same height as the perimeter decking, so the tub will be more than 28" above the perimeter.
If the metal post are farther than 5', then they don't need bonding. If they are, then bond them. It would be good to run the bond wire to the post before the pour, and before the floor is put in.
 
I went back to confirm the height of the slab being poured for the hot tub. Turns out that the perimeter decking will be 18" from the rim of the hot tub after the slab is poured. So I will have to bond the perimeter surface.

My question is, how do I bond the decking? It's not a metal surface. It's made of composite wood, which is non conductive. The decking isn't even touching the ground. It's raised off the ground.

Any insight would be helpful. Thanks!
 
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