Future hot tub

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rich000

Senior Member
Owner is finishing basement and would like to have a feeder for a future hot tub.

Plan is to run 6-3 cable from panel through ceiling before it is finished and terminate at a junction box (8"x8"x4") on the outside of the house (hot tub location not positively decided on yet).

Does anyone have any experience with this or problems? i.e. is there a better way?, avoid the junction box? etc.?
 
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jbell59

Member
Location
Virginia
Re: Future hot tub

Why not run 3/4 empty pvc conduit out from the panel and cap off with a temporary bell box or with an LB condulet
 
ed downey

ed downey

Senior Member
Location
Missouri
Re: Future hot tub

Rich,

When I Built My Brick Paver Patio I Roughed In A 1" PVC Conduit Underground And Stubbed It Up To The General Vicinity Of Where I Thought The Hot Tub Would Go. You Should Do The Same Thing Only Run EMT Overhead And Stub Out To A General Area. This Will Allow You More Flexibility Later On When The Hot Tub Goes In.
 
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drscott

Member
Location
Michigan
Re: Future hot tub

Correct me if I'm wrong, but the 1999 Nec 680-40 state provisions of Part A and B of this article. So wouldn't you have to run conduit for this panel for the spa anyhow.
Doug
 
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jbell59

Member
Location
Virginia
Re: Future hot tub

drscott I believe you OK as long as you adhere to any wiring method in Chap. 3 and its residential for the interior wiring. Once outside yes your correct.
 
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bill addiss

Senior Member
Re: Future hot tub

Rich,

If you think it's going to be within sight of the future Tub you can terminate at a Disconnect outside too, which you need anyway. And, it might look better than the J-Box.

Bill
 
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james wuebker

Senior Member
Location
Iowa
Re: Future hot tub

I sounds that you will be drilling through your band joist to the outside. That will be low to the ground. So what I would do is to put a nipple from the outside to the inside. Put an LB on the outside and set in place with the nipple attached to it. Pull enough of wire so it will take you to your disconnect where ever that will be. This will make your appearance of your outside of your house nicer. Of coarse make sure you run conduit from your LB to your disconnect. Also make sure that you run 6-3 with ground. Not just 6-3. let me know what you guys think.
Bye
 
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a.wayne3@verizon.net

Guest
Re: Future hot tub

they still make 6/3 with no ground??????????????? :eek: :eek: :eek:
 
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Will Wire

Senior Member
Location
California: NEC 2020
Occupation
Electrical Contractor
Re: Future hot tub

I installed a hot tub last summer which required four #6 copper conductors. For the installation I had to use conduit. This was the first time I ran into this problem. If anyone knows of a nonmetalic sheathed cable with four #6 copper I would be interested to here of it. Thanks
 
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rich000

Senior Member
Re: Future hot tub

Thank you all.

Went with the J-Box on the outside. Owner decided it looked fine. It can also be painted to match the house.
 
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Will Wire

Senior Member
Location
California: NEC 2020
Occupation
Electrical Contractor
Re: Future hot tub

Bill,

The #6 ground wire was required by the manufacturer of the spa and had a label stating this on the spa just below the electrical control box. It's a Canadian company but there was no provision if installed in the U.S. to use a #10 ground. I ask the inspector about this and I was told that if the manufacturer states a requirement that we have to adhere to it. I had bid the job to run a 6-3 w/g romex but instead used conduit. I have installed this brand before and they have not specified what size ground to use. It requires a two pole 50 amp gfci breaker so I installed a #10 ground.
I have not seen this #6 ground requirement on any other brand of spa. Thanks
 
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bphgravity

Senior Member
Location
Florida
Re: Future hot tub

Is it possible that the #6 requirement has something to do with the maximum potential line-to-case fault that is possible at the motor? I have delt with a few system designers that do not want the grounding conductor smaller than the ungrounded conductor to positively protect their equipment from faults. (I sometimes think it is because they know their prduct is crap and will blow-up if the fault current doesn't clear fasat enough.) Just a thought? :confused:
 
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bennie

Esteemed Member
Re: Future hot tub

This sounds like a European design for the US market.

European loop impedance can be higher than the same one in the US.

This is due to the different voltage to ground.

In Europe, a LG fault will clear as fast as a LL fault. Not so in the US.

[ April 11, 2003, 08:35 AM: Message edited by: bennie ]
 
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