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bond for pool #175753 03/10/08 04:43 PM
Joined: Mar 2008
Posts: 8
E
eddiecurrent Offline OP
New Member
i got a call to check pool lights for a costumer and noticed there was no #8 ground wire on any of the 2 pumps, lights, heaters, transformers,or sub panel.i didn't see any #8 solid at all in the sub panel.there was a stranded #8 or 10 from main panel.no ground rods at sub. they said the house was 6-8 years old.everything had lugs big enough for #8 including pumps.

my question is- does anyone know the codes for pool bond about 9-12 years ago?
i don't mess with pools much and am a new contractor.
i don't have code books past 2002.
since it's a ingrond concrete pool would the concrete act as a ground for the light, railing, and screen enclosure?
thanx for ur help.............

2017 / 2014 NEC & Related Books and Study Guides
Re: bond for pool [Re: eddiecurrent] #175756 03/10/08 05:14 PM
Joined: Nov 2007
Posts: 763
K
KJay Offline
Member
The #8 solid bonding requirement for pools has been in the code longer than I have been in the trade, and that’s since the early 1980's.
The #8 doesn’t need to go back to the panel, it only bonds the pool associated equipment together to create the equipotential bonding grid.

Re: bond for pool [Re: KJay] #175758 03/10/08 05:20 PM
Joined: Mar 2008
Posts: 8
E
eddiecurrent Offline OP
New Member
same grid meaning light, transformer, pool pumps, railing,heater, screen enclosure,etc. right?

Re: bond for pool [Re: eddiecurrent] #175759 03/10/08 06:04 PM
Joined: Jul 2004
Posts: 9,569
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gfretwell Online Content
Member
You should also be picking up the rebar in the pool shell. If you don't see some #8 solid anywhere I am guessing this was not built with a permit. The bonding should have been inspected at least twice and maybe 3 times


Greg Fretwell
Re: bond for pool [Re: gfretwell] #175775 03/11/08 07:15 AM
Joined: Apr 2003
Posts: 139
B
BPHgravity Offline
Member
We do three bonding inspections here in North Port. One at the shell, on at the deck, and one at the final.

I agree with Greg. If metal parts of the pool are not included in with the rest of the equipotential grid, such as shell steel, deck steel, metal handrails, niche light forming shell, metal within 5' of the water, ect..., a shock potential will be established between conductive parts.


Bryan P. Holland, ECO.
Secretary - IAEI Florida Chapter
Re: bond for pool [Re: BPHgravity] #175778 03/11/08 08:50 AM
Joined: Jun 2001
Posts: 161
M
Mike Wescoatt Offline
Member
2002 NEC 680.26
The following needs to be bonded:
1. Metallic structural components
2. Underwater lighting (except listed LV w/ non-metallic forming shells)
3. Metal fittings (except for fittitng <4" in dimension that penetrate <1" into pool structure)
4. Electrical Equipment
5. Metal wiring methods and equipment within 5' horiz or 12' vertically

(c) ...with a solid copper conductor, insulated, covered, or bare, not smaller than 8AWG.

hth. Mike


Mike Wescoatt
Re: bond for pool [Re: BPHgravity] #175788 03/11/08 02:55 PM
Joined: Mar 2008
Posts: 8
E
eddiecurrent Offline OP
New Member
the same grid means all brought back to same ground bar or can the pumps be taken off pool panel and the rest be bonded to a ground rod???

Re: bond for pool [Re: eddiecurrent] #175789 03/11/08 03:39 PM
Joined: Aug 2007
Posts: 853
L
leland Offline
Member
NOT GROUNDED. Just "bonded".

1 solid #8 from point to point to point unbroken. so essentialy they become 1 piece of metal, all of the same potential.

Re: bond for pool [Re: leland] #175803 03/11/08 07:28 PM
Joined: Apr 2003
Posts: 139
B
BPHgravity Offline
Member
The pool is already in contact with the Earth. Grounding of the pool and equipment will serve no purpose. The equipment grounding of the equipment will provide the effective fault path back to the source, while the equipotential bonding "shorts" out the battery created by the metal pool parts.


Bryan P. Holland, ECO.
Secretary - IAEI Florida Chapter
Re: bond for pool [Re: BPHgravity] #176017 03/18/08 06:09 AM
Joined: Mar 2005
Posts: 1,213
S
SteveFehr Offline
Member
That, and although water and earth are conductors, they're relatively poor conductors and can still set up a situation where a swimmer becomes a current carrier, which is far more dangerous in a pool than anywhere else due to the reduced skin resistance, nature of the circuit (current is very likely to pass through the heart), difficulty of breaking contact, high potential to drown, and difficulty of rescue as anyone trying to conduct a rescue would be at the same risk.

The equipotential bond ensures there will be no equipotential difference within the pool and pool area, so that even if a short were to occur, the entire pool will be at the same potential and no dangerous amounts of current can flow through the water.

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