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#80496 - 04/23/02 01:19 PM 40A Hot Tub Ckt  
frodo  Offline
Joined: May 2001
Posts: 129
louisville, ky usa
i have a job that needs a 240V 40A ckt to an outdoor hot tub. there is no room in the existing panel so a sub panel will be installed. the hot tub has a 20 foot cord with a 40A male plug on it. the cord is connected to a GFCI Brkr in a control panel.

my question is would the receptacle be considered the disconnect?

i beleive the supply outlet/circuit itself has to be gfci protected anyway according to code..

finally, if i mount the sub panel below the exisitng panel and then run the circuit for the hot tub or should i run a circuit from the existing panel over to the hot tub and use it for the disconnect there?

something to chew on anyway..

as always thanks for any replies


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#80497 - 04/23/02 02:49 PM Re: 40A Hot Tub Ckt  
Reel-Break  Offline
Joined: Apr 2002
Posts: 178
Around here we`d pop in what we call a triplex breaker it has DP 30 and either 2 20a breakers or DP 30 and 2 15a breakers built in a small package.Take the 30 DP hot water heater breaker out and either 2 20a breakers or 2 15 amp breakers out and this device will free up 2 spaces.All the home centers have them as well as supply houses.
Hope this helps,They are manufactured for several different panels Saves Time and money.

#80498 - 04/23/02 04:11 PM Re: 40A Hot Tub Ckt  
frodo  Offline
Joined: May 2001
Posts: 129
louisville, ky usa
thanks for the reply. the equipment i need to use is on hand.

i was just concerned about the code rule requiring a DISCONNECT within sight of the SPA/HOT TUB, and whether the feeder for this had to be a gfci breaker?

i think i will end up installing a sub panel below the meter with main lugs, then off a breaker at the panel into pvc over to the detached garage up and over and down to a 40A recept. feed the receptacle with a 40A GFI Breaker..

i beleive that would be the most economical way?

anybody see any problem with this?



#80499 - 04/23/02 05:11 PM Re: 40A Hot Tub Ckt  
caselec  Offline
Joined: Apr 2002
Posts: 558
San Jose, CA
How are you going to feed the sub panel if there are no spaces left in the panel? Are you going to move two of the existing circuits into your new panel? I have never seen a 240V hot tub designed to be connected with a cord so make sure that this is not something that was added by a former owner of the tub. In my area the only tubs that come with cords are the 20A 120V models and all of the 240V units are designed to be hard wired. Also remember if this receptacle is installed in a wet location it must have a cover approved for wet locations while in use. I am not sure how available these are for 50A receptacles.

Curt Swartz

#80500 - 04/23/02 06:39 PM Re: 40A Hot Tub Ckt  
Electricmanscott  Offline
Joined: Jan 2002
Posts: 1,457
Holden, MA USA
680.42(2) Cord and plug connections with a cord not longer than 15 feet shall be permited where protected by a GFCI
680 part IV and part I apply to spas and hot tubs.
Reading through it looks like a cord connection can be used for a disconnect. This is apparently for maintenance and repair and not for emergency.

#80501 - 04/23/02 08:03 PM Re: 40A Hot Tub Ckt  
sparky  Offline
Joined: Oct 2000
Posts: 5,311
section 4 [Linked Image] me. 680.12in sec #1 stipulates a disco, 680.42 ...

680.42 Outdoor Installations.
A spa or hot tub installed outdoors shall comply with the provisions of Parts I and II of this article, except as permitted in 680.42(A) and (B), that would otherwise apply to pools installed outdoors.

does this amend 680.12 to higher ampacities that 430.109F would normally allow?
I suppose 430.109F would be shot down by 90.3 ??
{ supplements or modifies}
[Linked Image]

#80502 - 04/24/02 08:39 AM Re: 40A Hot Tub Ckt  
frodo  Offline
Joined: May 2001
Posts: 129
louisville, ky usa
thanks for the replies.

the unit appears to be a factory wired unit. it has a nameplate that looks legit.

the cord is 15 feet.

i will use a SO cord hanging from a FS box with a cord cap fed by a gfci breaker...

the purpose as i read it is for MAINTENANCE and not necessarily for emergency disconnect..

thanks for the replies


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