The Electrical Contractor Network

ECN Electrical Forum
Discussion Forums for Electricians, Inspectors and Related Professionals

Books, Tools and Test Equipment for Electrical and Construction Trades

Register Now!

Register Now!

We want your input!

Featured:
   

2017 NEC and Related
2017 NEC
Now Available!

   
Recent Posts
breaker meltdown
by sparky
Yesterday at 07:30 PM
230 or 345 kV transmission lines?
by Vlado
09/24/16 09:33 AM
Electrical mast flashing product
by ThomasWinfrey
09/22/16 12:14 AM
What estimating software do you recommend?
by sparky
09/21/16 07:20 PM
"Dry Run" Inspection goes awry
by HotLine1
09/20/16 07:39 PM
New in the Gallery:
12.5A through 0.75mm˛ flex (just out of curiosity)
Shout Box

Top Posters (30 Days)
HotLine1 13
sparky 10
gfretwell 8
sparky66wv 8
Vlado 6
Who's Online
0 registered (), 258 Guests and 4 Spiders online.
Key: Admin, Global Mod, Mod
Topic Options
Rate This Topic
#176479 - 04/03/08 04:10 AM Hydro-Massage Bathtub Bonding
George Little Offline
Member

Registered: 01/18/04
Posts: 1492
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)
_________________________
George Little

Top
2014 / 2011 NEC & Related Books and Study Guides
#176480 - 04/03/08 05:28 AM Re: Hydro-Massage Bathtub Bonding [Re: George Little]
electure Offline

Member

Registered: 12/24/00
Posts: 4225
Loc: Fullerton, CA USA

Top
#176481 - 04/03/08 05:51 AM Re: Hydro-Massage Bathtub Bonding [Re: electure]
George Little Offline
Member

Registered: 01/18/04
Posts: 1492
Loc: Michigan USA
The memory is the second thing to go. \:\)
_________________________
George Little

Top
#176483 - 04/03/08 09:03 AM Re: Hydro-Massage Bathtub Bonding [Re: George Little]
SteveFehr Offline
Member

Registered: 03/19/05
Posts: 1192
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.

Top
#176543 - 04/05/08 06:23 PM Re: Hydro-Massage Bathtub Bonding [Re: SteveFehr]
Obsaleet Offline
Member

Registered: 04/05/03
Posts: 361
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
_________________________
Choose your customers, don't let them choose you.

Top
#176544 - 04/05/08 06:27 PM Re: Hydro-Massage Bathtub Bonding [Re: Obsaleet]
Obsaleet Offline
Member

Registered: 04/05/03
Posts: 361
Loc: Pa
680.26(B)(3) I think applies here

Ob
_________________________
Choose your customers, don't let them choose you.

Top
#176556 - 04/06/08 05:28 AM Re: Hydro-Massage Bathtub Bonding [Re: SteveFehr]
BPHgravity Offline
Member

Registered: 04/08/03
Posts: 141
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
_________________________
Bryan P. Holland, ECO.
Secretary - IAEI Florida Chapter

Top
#176559 - 04/06/08 06:59 AM Re: Hydro-Massage Bathtub Bonding [Re: BPHgravity]
Obsaleet Offline
Member

Registered: 04/05/03
Posts: 361
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
_________________________
Choose your customers, don't let them choose you.

Top



ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals