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Old 04-03-2011, 10:01 AM   #1
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40 Amp 240 V Hot tub into dryer outlet?


my breaker box is full and no one will hook up my hot tub without charging me a bunch of money to upgrade my whole system. my question is: can I just run a big 240 v extension cord from the hot tub to the dryer outlet, plug it in and turn it on? then plug the dryer back in when I need to use it?

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Old 04-03-2011, 10:04 AM   #2
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40 Amp 240 V Hot tub into dryer outlet?


Noooooooooooooooooooooooooooo!!!

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Old 04-03-2011, 10:06 AM   #3
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40 Amp 240 V Hot tub into dryer outlet?


why not?
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Old 04-03-2011, 10:10 AM   #4
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40 Amp 240 V Hot tub into dryer outlet?


First of allyour dryer is rated for 30amps. You have stated that the hot tub is rated for 40amps. Your hot tub also need to be on a GFI breaker and grounded properly.
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Old 04-03-2011, 10:11 AM   #5
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40 Amp 240 V Hot tub into dryer outlet?


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Originally Posted by MVG View Post
why not?
For starters:
Lack of GFCI protection
Dryer receptacle is 30 amps not 40
Where will you get a 40 amp extension cord?

OH, I forgot: NEC code!
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Old 04-03-2011, 04:59 PM   #6
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40 Amp 240 V Hot tub into dryer outlet?


You'll want a dedicated circuit. Cheapeast way would be to add a small sub panel, and then a 30 amp for the dryer, and a 40 amp GFCI for the hot tub. Both double pole.
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Old 04-03-2011, 08:00 PM   #7
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40 Amp 240 V Hot tub into dryer outlet?


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Originally Posted by MVG View Post
my breaker box is full and no one will hook up my hot tub without charging me a bunch of money to upgrade my whole system. my question is: can I just run a big 240 v extension cord from the hot tub to the dryer outlet, plug it in and turn it on? then plug the dryer back in when I need to use it?
The sweet et simple answer is... Don't go there not even worth to do this at all.,,

I do not know if you are in USA or Canada the code answer will varies a bit.

In USA there are a bit of code we have to follow and the safest way is add a subpanel or replace the load centré to larger one.

And please do the load demand caluations to determed to see if your exsting service size can handle addtional load like your hot tub.

And if you are in USA then read the NEC code art 680 that will cover this very well.

Also the equliplane bonding that you will have to address it { this part you will need to take a photo and doucment and show that to the inspectors } or the inspectors will tell you what they required in your area.

And please follow the instruction and do not skim on this one.

I know this question will start to pop up pretty frequent.

Merci.
Marc

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