Jacussi grounding and bonding

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a7

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I know I am supposed to use #8 solid to bond motor and all metal parts to hot and cold water(copper) pipe.
My question is: do I have to continue this #8 solid grounding(bonding) wire to the panel? Or is the equipment grounding conductor (branch circuit)considered as proper grounding? Jacussi is on GFCI of course.
Thanks for any info.
 
Re: Jacussi grounding and bonding

OK, thanks. It seems that way. I think you're right.
The reason I was asking is that I have seen it done by both ways. The first one is exactly like you wrote and the second one is that bonding conductor (#8 solid)was connecting all metal parts + motor and was ran all the way to the panel. So I didn't know if I am supposed to do it like this or like that.
Thanks.
 
Re: Jacussi grounding and bonding

Take a look at the FPN to 680.26, which is for pool bonding. I realize that the requirement is for 680.74, not 680.26, but the intent is the same. Also be aware this is all going bye-bye in the 2005 NEC.
 
Re: Jacussi grounding and bonding

I am looking at it now...........
Thank you Ryan.
 
Re: Jacussi grounding and bonding

Last question.
Does it mean that if I have PVC water pipes in my house I don't have to bond anything? (still talking about jacussi)
Thanks, Ivo
 
Re: Jacussi grounding and bonding

What does the new 2005 code say about bonding of a Jacuzzi? I don't have the new book yet.
 
Re: Jacussi grounding and bonding

Originally posted by sharkvvv:
[QB] What does the new 2005 code say about bonding of a Jacuzzi? I don't have the new book yet.
Click to expand...
The code doesn't say a word about bonding a Jacuzzi. However, there is a whole chapter about hot tubs, spas, hydromassage bathtubs and swimming pools.
 
Re: Jacussi grounding and bonding

Part VII of Article 680 of the 2005 NEC states:
680.74 Bonding. All metal piping systems and all grounded metal parts in contact with the circulating water shall be bonded together using a copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG solid.
Click to expand...
Your motor, being "metal parts in contact with the circulating water" will need to be bonded regardless of whether the house plumbing or recirc plumbing is PVC or not. So, yes, you'd have to run a #8 back to the panel, or metal water pipe, etc.
 
Re: Jacussi grounding and bonding

George Stolz
I would have to disagree with you on the part of bringing the #8 bond wire back to the panel. The motor is already grounded through the 3 wire cord attached to the motor, or it is double insulated.

680.74 says that all metal piping systems and all ungrounded metal parts shall be bonded together.

The motor is grounded and all piping systems are non metallic. Therefore I see no need for any bonding.

Bob
 
Re: Jacussi grounding and bonding

The lug is there for the bond, if it is needed. With no other metal involved I also see no need for the bond.
 
Re: Jacussi grounding and bonding

GeorgeStolz,
The residential division of our company wires approx. 300 homes per year, about 100-125 of these have "jacuzzi's" in them, all with plastic water lines (pex tubing). None of which have any bonding done to the pump motors.

Bob
 
Re: Jacussi grounding and bonding

On second thought,
Part VII of Article 680 of the 2005 NEC states:
680.74 Bonding. All metal piping systems and all grounded metal parts in contact with the circulating water shall be bonded together using a copper bonding jumper, insulated, covered, or bare, not smaller than 8 AWG solid.
Click to expand...
The bonding conductor in the motor cord isn't #8. Then again, this doesn't stipulate that it should be connected to the equipment bonding system either. It just says that they shall be bonded together. Intent aside, the words aren't all there. :(
:confused:
 
Re: Jacussi grounding and bonding

George
The bonding of hydromassage tubs is very similar to the bonding of pools. The purpose is not to ground the pool, but to create an EQUIPOTENTIAL BONDING GRID of sorts. This will help to reduce the potential for a shock hazard to develop between metallic parts associated with the circulation pump. Read the FPN following 680.26(A).

Pierre
 
Re: Jacussi grounding and bonding

Pierre,

You just blew my mind. :D

What are voltage gradients a result of, and why does linking everything togther without reference to ground fix it?
 
Re: Jacussi grounding and bonding

What are voltage gradients a result of, and why does linking everything togther without reference to ground fix it?
Click to expand...
This is a difficult thing to explain but I'll give it a try.

Imagine a person standing in the shallow end who happens to be touching the cover of the deck box at the instant that a "ground fault" occurs in the cord supplying the wet-niche luminaire.
A current sufficient to trip the lighting circuit breaker will flow through the hot wire supplying the fixture, through the fault to the deck box, and through the circuit EGC back to the service MBJ to neutral.

If the #8 bonding conductor was not there, until the breaker trips there could be a voltage difference equal to the voltage drop in the circuit EGC, between the deck box and any other grounded surface or conductive object.

The #8 bonding conductor is connected so that it is in parallel with the path through a person that is in contact with any two conductive objects or surfaces.

The voltage between any two conductive objects or surfaces cannot be higher than the voltage drop in the section of #8 bonding conductor between those two points.

Ed

Pool2.gif


[ January 24, 2005, 09:32 AM: Message edited by: Ed MacLaren ]
 
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