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#7106 - 04/13/10 07:05 PM
Re: Pool Water Bonding
[Re: Ron Wampler]
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Secretary
   
Registered: 10/05/04
Posts: 1599
Loc: City of North Port
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The pool water bonding orignated from a report published by the National Electric Energy Testing Research and Application Center and submitted to the NFPA under proposal 17-122 of the 2007 ROP.
In short, the study performed by them basically shows that pool acts musch like a battery. The mix of conductive elements, water, and chemicals will allow the flow of current across the body of a human within the water. Tests showed that an intentional bond to the water elminated this hazard.
In most cases, other bonded items such as ladders, handrails, pool ight shells, etc. will serve as the bond. When those items are not present, another means must be provided such as a metal plate imbedded in the side or bottom of the pool, or perhaps a short section of metallic piping within the circulating system.
_________________________
Bryan P. Holland, MCP
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#7139 - 04/16/10 04:01 PM
Re: Pool Water Bonding
[Re: Mike Timpanaro]
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Mechanic Member
Registered: 04/23/07
Posts: 115
Loc: Plant City
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Ruben; I wouldn't look for the TCC to go too near this anytime in the near future, this was a very unpopular change, If you remember it was a proposal for the 2005 cycle, and was rejected, if you remember,when that proposal was read at the Southern Section meeting, it got a big laugh when Mark Ode spoke against it,________________________________________________________________ 17-167 Log #1888 NEC-P17 Final Action: Accept ( 680.26(B)(6) ) ________________________________________________________________ Submitter: Frederic P. Hartwell, Hartwell Electrical Services, Inc. Comment on Proposal No: 17-120 Recommendation: The proposal should be rejected. Substantiation: Water cannot be bonded. Suffice it to say that this proposal produced the highest reading on the laugh meter at the IAEI annual meeting, as a nationally recognized NEC expert described the evident futility of making such connections using hydraulically crimped connectors (“but the water just oozed out”) or exothermic welding (“but the water extinguished the fuse”) etc. Metal parts can and should be bonded to provide an equipotential plane in
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#7142 - 04/16/10 07:34 PM
Re: Pool Water Bonding
[Re: psnorthrup]
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Senior Member
   
Registered: 05/24/00
Posts: 764
Loc: Lutz,FL
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Ruben; I wouldn't look for the TCC to go too near this anytime in the near future, this was a very unpopular change, If you remember it was a proposal for the 2005 cycle, and was rejected, if you remember,when that proposal was read at the Southern Section meeting, it got a big laugh when Mark Ode spoke against it,________________________________________________________________ 17-167 Log #1888 NEC-P17 Final Action: Accept ( 680.26(B)(6) ) ________________________________________________________________ Submitter: Frederic P. Hartwell, Hartwell Electrical Services, Inc. Comment on Proposal No: 17-120 Recommendation: The proposal should be rejected. Substantiation: Water cannot be bonded. Suffice it to say that this proposal produced the highest reading on the laugh meter at the IAEI annual meeting, as a nationally recognized NEC expert described the evident futility of making such connections using hydraulically crimped connectors (“but the water just oozed out”) or exothermic welding (“but the water extinguished the fuse”) etc. Metal parts can and should be bonded to provide an equipotential plane in Right or wrong. ridiculous or not it is in print now! So the AHJ has no choice but to enforce the requirement. So maybe the TCC will amend or change it. Remember the seu temp rating issue a few cycles back? It was a oversight but we lived with it for years.
_________________________
Webmaster IAEI Florida Chapter
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Registered: 03/19/10
Posts: 0
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