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#91083 - 12/29/04 09:42 PM Pool motor bonding  
aldav53  Offline
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Joined: Aug 2001
Posts: 545
Chandler, AZ USA
Does a residential pool motor need to be bonded from the motor to the panel? Or can it be bonding at a water pipe or another closer place. #8 minumum required I believe also, correct?


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#91084 - 12/29/04 10:33 PM Re: Pool motor bonding  
Electricmanscott  Offline
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Joined: Jan 2002
Posts: 1,457
Holden, MA USA
Read article 680 carefully.


#91085 - 12/29/04 11:54 PM Re: Pool motor bonding  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
The pool motor (lights etc) gets "grounded" to the panel via the equipment grounding conductor in the circuit feeding it. Pool equipment also gets "bonded" to the pool shell and all other parts of the equipotential grid with a #8 solid copper. That includes pool steel, deck steel, underwater light forming shells and any piece of metal bigger than the palm of your hand within 5' of the water's edge


Greg Fretwell

#91086 - 12/30/04 12:22 AM Re: Pool motor bonding  
aldav53  Offline
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Joined: Aug 2001
Posts: 545
Chandler, AZ USA
But does a separate #8 ground wire have to go back to the panel from the motor, or water pipe?


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#91087 - 12/30/04 12:53 AM Re: Pool motor bonding  
Bill Addiss  Offline
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Joined: Oct 2000
Posts: 3,878
NY, USA
Quote
But does a separate #8 ground wire have to go back to the panel from the motor, or water pipe?
No, the items in gfretwell's post get connected together, but it does not have to go anywhere else.

Bill

[This message has been edited by Bill Addiss (edited 12-29-2004).]


#91088 - 12/30/04 01:14 PM Re: Pool motor bonding  
gfretwell  Offline


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Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
Grounding happens via the EGC in the wiring method supplying the motor. In the case of the light that EGC shall also be made "without joint or splice". (from the listed pool J box to the panel with the only place a splice is allowed is in another listed J box or on a terminal bar in the timer/switch).
The pool bonding grid will get grounded via these paths but that is not the intent. The bonding grid is only to ensure that there is no voltage shift between anything you can touch from the pool. In real life I doubt there is a better grounding electrode at your house than a concrete inground pool but again that is not the intent.


Greg Fretwell

#91089 - 12/30/04 02:04 PM Re: Pool motor bonding  
stevenbohrer  Offline
Junior Member
Joined: Dec 2004
Posts: 6
There's a little history to this post in the 100A Subpanel thread, but this thread seemed more appropriate.

To recap:

I have a pool contractor that is replacing existing pool equipment. There is no connection between the pool bond and the panel equipment ground (at least I can't find one). Neither is there an accessible connection point to the pool bond. In 680.26(B)(4), the 2nd paragraph describes bonding provisions for a replacement pump. It specifically says "where there is no connection between the swimming pool bonding grid and the quipment grounding system for the premises, this bonding conductor sall be connected to the equipment grounding conductor of the motor circuit."

Am I missing something? Does code require I bond the pump to the equipment ground (with solid 8 AWG), or do I have to chip out concrete and bond to the pool/patio rebar?

FWIW, the equipment is not within 5' of the pool edge.

Cheers,

Steve


#91090 - 12/31/04 02:56 AM Re: Pool motor bonding  
gfretwell  Offline


Member
Joined: Jul 2004
Posts: 9,099
Estero,Fl,usa
They should have brought an 8ga bonding conductor from the pool grid to the pump. Are you sure it isn't there in the grass somewhere? If there is a screen cage there should be a stub out to bond it there too.
If they buy a double insulated pump you don't need the bond conductor.


Greg Fretwell

#91091 - 12/31/04 01:20 PM Re: Pool motor bonding  
stevenbohrer  Offline
Junior Member
Joined: Dec 2004
Posts: 6
The area around the pumps is clear, so I think this is just one more code violation in the house (I've already found many others). There is a bond point on the pump, so I don't think it's double insulated.

So as I read the code, in this scenario, I can use 8AWG to bond the pump to the equipment panel instead of chipping concrete?


#91092 - 12/31/04 02:00 PM Re: Pool motor bonding  
Roger  Offline
Member
Joined: May 2002
Posts: 1,716
N.C.
Stephen, are you saying there is no EGC (green or bare conductor) in the conduit or cable feeding the pump?

Running a #8 to the panel is not bonding the pool surfaces and equipment to achieve "Equipotential"


Roger


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