Pool bonding: Metal drain grate in 50+ pieces

J

JoeNorm

Senior Member
Location
WA
This one is just funny........Within 5' along one entire edge of this pool is a a trench drain. The grate is metal and in 1' sections.

I am pretty certain I will have to bond each piece. But my question is how? Does it have to be a listed assembly or am I allowed to come up with my own method? The place is to either through bolt each piece or drill and tap. I'd have a continuous #8 running the length of the drain.

thanks
 
They are not fastened. They just lay into a plastic gutter that is embedded in concrete.

I am sure plastic might be available but that is not really the style of this build. Stone might be able to acceptable but all the metal ones are purchased and on site.
 
JoeNorm said:
They are not fastened. They just lay into a plastic gutter that is embedded in concrete.

I am sure plastic might be available but that is not really the style of this build. Stone might be able to acceptable but all the metal ones are purchased and on site.
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Sounds like you'll need to go back to pool designer and ask them how they planned on bonding the metal grills per code. Changing them sounds like the best option.
 
Pool designers don't know squat about codes-except me :p

I would treat these grates like a chain link fence within 5' of the water bonding every post.
So, each of the grates would need a bond lug tied into your bond wire unbroken. Drilling and tapping sounds like the best idea unless there is flange or similar spot to run bolt through.

It'll be a PIA every time the grates need to be removed to clean the gutter. Plus, no matter what special finish is on those grates. they will corrode.
 
We've done pools like this in commercial buildings. They had to ensure that the design had the minimum clearance to the metal grills. That doesn't mean that they didn't have other issues. Here's one of them:
waterline_008_full.jpg
 
JoeNorm said:
They are not fastened. They just lay into a plastic gutter that is embedded in concrete.

I am sure plastic might be available but that is not really the style of this build. Stone might be able to acceptable but all the metal ones are purchased and on site.
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Doesn't "fixed" basically mean "fastened".

If they aren't fastened, it doesn't seem like they would be considered fixed, so they wouldn't need bonded. Unless that's changed recently.
 
steve66 said:
Doesn't "fixed" basically mean "fastened".

If they aren't fastened, it doesn't seem like they would be considered fixed, so they wouldn't need bonded. Unless that's changed recently.
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To me, fixed is something stationary, but firmly in place. Fastened to me is something kept in place by mechanical means. Such as a fastener, ie, screw, bolt, clip, etc.
 
This will be addressed in the 2026 code.
The following was in the first draft:
Fixed (as applied to equipment).
Equipment that is fastened or otherwise secured at a specific location. (CMP-17)
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Note that the panel that has responsibility is CMP17, and they have responsibility for Article 680.
In the second draft the definition responsibility was give to panel one as the definition is general in nature.
 
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