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Old 12-07-2009, 12:47 PM   #1
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Need hot-tub wiring advice


I have an exterior hot-tub that I need to hard wire. The previous owner had a dryer plug on the end of a 12 ft 3-line wire and was just plugging it in to his dryer socket when he wanted to use the hot-tub. I'm no electrician but I know that is a bad idea. The house has existing 220 that was used for the baseboard heaters which are no longer in use. Is it possible to tie in to that 220 with either a GFCI in the service box or in a new box outside that has a cut off switch so it can be shut off completely when not in use? Or do I have to pay an electrician $800 to spend an hour wiring this directly into the service?

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Old 12-07-2009, 01:04 PM   #2
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Need hot-tub wiring advice


Most likely you won't be able to reuse those wires. To do it right you'll have to go all the back to the main panel and have a disconnect outside. Do you have the specs of the tub?

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Old 12-07-2009, 03:03 PM   #3
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Not on hand. I can get them. I know the wires are still live, they have just been turned off at the breaker in the service box. That is why I thought, since the end of the wire run is about 5 feet from the hot-tub, I could just stub out to a throw switch type breaker and wire from there to the tub. Does that make sense?
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Old 12-07-2009, 03:23 PM   #4
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Need hot-tub wiring advice


Chances are the wires are too small to use on the hot tub.
$800 might seem like too much, but consider how much safer you will be in that hot tub than the rigged method it is connected now!!!!!!
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Old 12-07-2009, 05:57 PM   #5
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Need hot-tub wiring advice


The big box stores will have spa disconnect box with GFCI breaker / already installed for this application - usually a 50 amp breaker if I recall.

What are the spa's requirements? What is the circuit from the old electric heat - what size wire and breaker? If proper, use it to power the spa disconnect box.
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Old 12-07-2009, 07:20 PM   #6
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Need hot-tub wiring advice


I will check that out more thoroughly. I do think that the wiring and a new GCFI breaker will do the trick. like I said it used to have a dryer plug on the end and would be plugged into the dryer outlet to run the tub. From what I understand, that worked fine, it is just not a good idea. I will see if Lowe's can help me with the correct combination of wires, breakers and the cut off switch. Thanks a lot for the point in the right direction.
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Old 12-07-2009, 07:32 PM   #7
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Most of the employees at the big box stores know NOTHING about the NEC code & wires required to connect devices
Especially a Hot Tub
HD has a big sign up stating the INCORRECT wire size to use when running a 100a sub
There are very specific rules & regulations to follow for a hot tub

There have been numerous threads on this site of wiring that did not meet code & the poster was informed by a big box store on how to wire everything
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Old 12-07-2009, 09:05 PM   #8
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Quote:
Or do I have to pay an electrician $800 to spend an hour wiring this directly into the service?
If the quote was 800 bucks, it is gonna take a lot longer than an hour.


If you want to do it yourself, all I can say is GFCI.
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Old 12-07-2009, 11:26 PM   #9
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you can also use a gfci breaker and hard wire it in! good luck
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Old 12-08-2009, 07:27 AM   #10
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Wiring a hot tub as a DIY project is so dangerous that some jurisdictions have completely banned homeowners from doing this. Too many folks fried trying to save a buck. You sure you want to take your life into your hands like this?
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Old 12-08-2009, 12:21 PM   #11
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Quote:
Originally Posted by vsheetz View Post
The big box stores will have spa disconnect box with GFCI breaker / already installed for this application - usually a 50 amp breaker if I recall.
Yes, and they make the job go very easy and compliant, provided you are competent to install it. This is really not for the DIY'er.

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Last edited by J. V.; 12-15-2009 at 02:17 PM.
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