Pool water bonding

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keith gigabyte

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New Kensington, Pa
Yes bonding pool water. We have seen a situation where above ground (storable per 680)pool installers are asking that the pool water be grounded..I assume they mean bonded. The system consists of a screw somewhat like a carriage bolt head in the water and a rubber water sealing washer with a stud 1/4 -20 sticking out the dry side of the pool to be connected to grounding electrode..any input on this?
 
keith gigabyte said:
Yes bonding pool water. We have seen a situation where above ground (storable per 680)pool installers are asking that the pool water be grounded..I assume they mean bonded. The system consists of a screw somewhat like a carriage bolt head in the water and a rubber water sealing washer with a stud 1/4 -20 sticking out the dry side of the pool to be connected to grounding electrode..any input on this?
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It doesn't connect to a grounding electrode it connects to the rest of items comprising the equipotential bonding.

This individual item intended to bond water only is not necessary if you already have bonded items in contact with the water such as an already bonded metal ladder, metal lighting shells/trims already bonded, or even metallic sections of water piping if they are bonded. There is a minimum surface area of metal that needs to be in contact with the water, can't remember what it is off the top of my head, but many of the items I mentioned will exceed that minimum surface area.
 
keith gigabyte said:
I'm only going on what the pool shop told me..Is there anything in the code about this..not seeing it in the 2008..thats where we are now..in my juristiction
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Well I looked and see that all the equipotential bonding rules apply to permanently installed pools section of art 680.

Maybe look into listing requirements and instructions that come with the listing of the pool you have. I'm guessing there is no such rules in NEC because a storable pool would be a listed unit and these rules that apply to field constructed pools would be taken care of by the listing and construction is done where the pool was manufactured.

I would guess you at least maybe need to field install (per listing instructions) a bonding jumper to your water bonding device (that is likely already installed in the pool) to the circulation pump motor, and/or other field installed/assembled equipment that would need bonded.
 
If the depth of the water is greater than 42" you have to treat it as a permanently installed pool. 680.26(C) is for the water bond.

(C) Pool Water. An intentional bond of a minimum conductive
surface area of 5806 mm2 (9 in.2) shall be installed
in contact with the pool water. This bond shall be permitted
to consist of parts that are required to be bonded in
680.26(B).
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Other than that it would go back to the mfg specs for installing the pool.
 
kwired said:
It doesn't connect to a grounding electrode it connects to the rest of items comprising the equipotential bonding.
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The bonding screw is simply protruding from the above-ground-pool and acts to deviate or eliminate possible current? Or is it connected by wire around the pool to the part(s) you mentioned then to ... ... something away from the pool?



-- J. Davis (tapatalk!)
 
DavJ09 said:
The bonding screw is simply protruding from the above-ground-pool and acts to deviate or eliminate possible current? Or is it connected by wire around the pool to the part(s) you mentioned then to ... ... something away from the pool?



-- J. Davis (tapatalk!)
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It will not eliminate current. All the conductive parts around a pool are to be bonded together so that they are all operating at same voltage potential, which will reduce the risk of shock to users of the pool. The pool water itself is also an item that is required to be bonded to the "equipotential bonding" system. Like I said earlier the pool water may already be bonded by some items that I mentioned but if not then this device you are describing is necessary. Those rules are all in the section for permanent pools and your portable pool is not covered by that section. A listed pool could have metal objects that are not bonded, but if so they were likely examined in the listing process and deemed not likely to introduce any troubles or they would likely be bonded or have instructions that tell you to bond them.

Then we have the section brought up that says if the portable pool is over 42" deep it must follow the permanent pool requirements, so if your pool is deeper then that you do have rules in NEC that apply to bonding all metal objects of your pool, as well as the pool water.
 
Maybe I should have been more descriptive. I realize permanent pools fall under a different set of rules. I am referring to installations of above ground pools with a water depth of 42 inches or less and can be disassembled with common hand tools; this qualifies it as a portable/storable pool
 
keith gigabyte said:
Maybe I should have been more descriptive. I realize permanent pools fall under a different set of rules. I am referring to installations of above ground pools with a water depth of 42 inches or less and can be disassembled with common hand tools; this qualifies it as a portable/storable pool
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Do you still have a question? We have determined the storable pool doesn't have the same equipotential bonding rules as a permanent pool does, but may have instructions for bonding that go beyond what is mentioned in the NEC included with the listing.
 
keith gigabyte said:
Maybe I should have been more descriptive. I realize permanent pools fall under a different set of rules. I am referring to installations of above ground pools with a water depth of 42 inches or less and can be disassembled with common hand tools; this qualifies it as a portable/storable pool
Click to expand...


If it is a storable pool then why are the installers telling you to bond the water. Storable pools fall under 680 part III. No bonding of the water is necessary
 
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