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Member

Join Date: Mar 2008
Posts: 8

grounding

01/04/2009 11:08 AM

I have a small above ground jacuzzi tub. It is made up of all plastic material. The only metal is the motor/heater unit. This jacuzzi is plugged into a standard 120 volt 60 hz g.f.i protected outlet.The electric outlet did not have a ground so I installed a ground clamp to the cold water system of my house and ran a #12 ground wire to the g.f.i. The jacuzzi is sitting on a brick patio slab.Recently I was standing on wet bricks barefooted outside the jacuzzi,and reached in the water to feel the temperature. I received a large shock and the g.f.i tripped off. There is a lug location on the motor/heater for a bond wire but I have nothing installed on it.How can I make sure this jacuzzi is 100% safe to use again?

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Guru
Popular Science - Weaponology - New Member United Kingdom - Member - New Member

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Location: Harlow England
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#1

Re: grounding

01/04/2009 11:36 AM

With something so potentially letal, I'd get a qualified electrican to check it all out.
My guess is the pump motor has a short from a winding to the body, if you earth the body, you will probably find it trips the supply, in which case fit a new pump.
All metalwork should must be grounded in a system like that.

It should must also have an earth leakage circuit breaker fitted.

Del

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Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
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#2

Re: grounding

01/04/2009 11:55 AM

Gamundia

Does the plug have a grounding lug? (3 prongs) If so, there should be an equipment grounding conductor in the cable you plug into the GFI. It may be green. Make sure all metal parts are bonded to this conductor, including the motor. If the metal parts had been bonded, the GFI should have tripped prior to your touching anything if there was a fault condition.

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Power-User

Join Date: Dec 2006
Posts: 346
Good Answers: 6
#3

Re: grounding

01/04/2009 2:19 PM

gamundia; thank god for the gfi, whats you wife been up to lately. ben their

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Guru

Join Date: Jul 2008
Location: SoCal USA
Posts: 556
Good Answers: 23
#4

Re: grounding

01/05/2009 12:04 AM

Wow, gamundia, I am amazed you are still with us and glad you survived!

I would advise that you read thoroughly the 'good answers' on this CR4 thread, especially this one, since it addresses exactly what you need to know about your choice of grounding and the dangers of using piping for a ground.

Since you have not bothered to indicate where you are located in your profile, we will be at a loss to get specific without more information, but in general, you are risking your life to continue using this hot tub before you have a qualified electrician complete your connections.

This time (as you may already know,) it is worth the money.

There are so many small details about the possibilities here, simple enough to a skilled electrician, but if you miss ONE of them and get this wrong, we may lose a fine member of CR4 and not know why you aren't with us anymore.

Don't rely on what we are able to share with you on this forum on this one. We care too much for you and your family's safety.

Please let us know when your electrician is done, what he corrected and the results of any testing he does, Thank you and I look forward to hearing from you on this.

CJM

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Anonymous Poster
#5

Re: grounding

01/05/2009 5:43 AM

Bonding to the cold water pipe supply is good if there are no places where PVC has been used for repair and make sure that the power company ground is bonded to the copper plumbing, too. Also, bond the motor ground lug and I would even use a bigger wire for the ground (#10). Good Luck and happy soaking!!

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Guru

Join Date: Jul 2008
Location: SoCal USA
Posts: 556
Good Answers: 23
#6
In reply to #5

Re: grounding

01/05/2009 7:52 PM

Dear Guest, (why not log in?)

Please be advised that NO trained electrician would advise any one to use a copper water pipe for a ground. Obviously you did not read the previous posts on this forum on this subject.

Bonding to pipes is NOT for the purpose of obtaining a ground source, but only for the purpose of activating a protective device in the event the pipe becomes energized.

For you to give this advise is to encourage this person to endanger himself and his family. Please be more responsible in your posts.

Regards, CJM

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#7

Re: grounding

01/06/2009 9:43 AM

It's trying to say something like:

"I AM FAULTY AND I NEED TO BE CHECKED OUT BY A QUALIFIED ELECTRICIAN AND MADE SAFE PRIOR TO BEING ENERGISED AGAIN".

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