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#176479 - 04/03/08 04:10 AM Hydro-Massage Bathtub Bonding
George Little Offline
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Registered: 01/18/04
Posts: 1488
Loc: Michigan USA
The wording in 680.74 is such that only the metal parts associated with the water circulation system need to be bonded together. This would rule out the isolated parts like the faucet or water spout that are quite often metal and are connected to non-metallic piping system. Maybe.

Second point- If we have a double insulated pump there is no bonding needed for the pump and the cord of the pump contains an EGC and grounding of the metallic parts of the pump happens due to the cord/ cap connection to a grounded GFCI protected receptacle. Now, if I choose to terminate the #8 bonding wire to the grounding conductor of the branch circuit, is this a problem?


Edited by George Little (04/03/08 04:11 AM)
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#176480 - 04/03/08 05:28 AM Re: Hydro-Massage Bathtub Bonding [Re: George Little]
electure Offline


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#176481 - 04/03/08 05:51 AM Re: Hydro-Massage Bathtub Bonding [Re: electure]
George Little Offline
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#176483 - 04/03/08 09:03 AM Re: Hydro-Massage Bathtub Bonding [Re: George Little]
SteveFehr Offline
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Registered: 03/19/05
Posts: 1195
Loc: Chesapeake, VA
Originally Posted By George Little
The wording in 680.74 is such that only the metal parts associated with the water circulation system need to be bonded together. This would rule out the isolated parts like the faucet or water spout that are quite often metal and are connected to non-metallic piping system. Maybe.
If the metal fixture is attached to steel or copper pipe, it's grounded through that pipe. If the metal fixture is attached to plastic pipe, it's not a path to ground, and is also safe. Safer, really; there's no chance of something like that becoming energized, so it's not a potential shock risk from that standpoint, either, and is as safe to the bather as if it were plastic.

Makes perfect sense, actually.
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#176543 - 04/05/08 06:23 PM Re: Hydro-Massage Bathtub Bonding [Re: SteveFehr]
Obsaleet Offline
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Registered: 04/05/03
Posts: 362
Loc: Pa
I believe ther is a size of surface area. I think it is in sq inches. X amount of square inches and the bond is needed. I will see if I can find it.

Ob
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#176544 - 04/05/08 06:27 PM Re: Hydro-Massage Bathtub Bonding [Re: Obsaleet]
Obsaleet Offline
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Registered: 04/05/03
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680.26(B)(3) I think applies here

Ob
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#176556 - 04/06/08 05:28 AM Re: Hydro-Massage Bathtub Bonding [Re: SteveFehr]
BPHgravity Offline
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Registered: 04/08/03
Posts: 139
Loc: Port Charlotte, Florida
Originally Posted By SteveFehr
If the metal fixture is attached to steel or copper pipe, it's grounded through that pipe. If the metal fixture is attached to plastic pipe, it's not a path to ground, and is also safe. Safer, really; there's no chance of something like that becoming energized, so it's not a potential shock risk from that standpoint, either, and is as safe to the bather as if it were plastic.

Makes perfect sense, actually.


The requirement in Section 680.74 is to establish equipotential bonding at and directly around the hydro-tub in order to reduce the protential of voltage gradients. It really has nothing to do with grounding or establishing an effective fault path to clear unitentionally energized parts.


Originally Posted By Obsaleet
680.26(B)(3) I think applies here

Ob


Hydromassage bathtubs need only meet the requirements of Part VII. of Article 680. The section you reference would not apply. See Section 680.70
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#176559 - 04/06/08 06:59 AM Re: Hydro-Massage Bathtub Bonding [Re: BPHgravity]
Obsaleet Offline
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Registered: 04/05/03
Posts: 362
Loc: Pa
I stand corrected however, 680.74 says only the parts that are parts in contact with the circulating water are to be bonded. I would not consider the faucet and handle part of the cirulating system the are the fill system, and are not in contact.

Ob
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