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  #1  
Old 09/26/12, 08:58 PM
 
Join Date: Oct 2010
Location: Central MN
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Smoker wiring

I would like to use 240 volt stove top elements in our smoker, a 6" 1500 watt with a temp. control knob for smoke generation and an 8" 2600 watt with a 50-250 degree thermostat. THE QUESTION: the heat elements and the thermostat have one hot lead and a neutral. How can I convert two 120 volt lines in to a single 240 volt line. I've done lots of house wiring but this has me stumped.

Thanks
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  #2  
Old 09/27/12, 07:13 AM
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Location: Central WI
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a transformer
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  #3  
Old 09/27/12, 09:22 AM
Plotting My Escape
 
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Location: Williamsport, PA
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Why not run a dedicated line from your breaker box? That would be the safest and easier IMHO.

I think you could do it with a 240v outlet. Use the separate line ins for the two hot, tie the neutral and returns together...but I'm not 100% certain. I'd still go with the dedicated line/outlet/breakers.

Last edited by Steve in PA; 09/27/12 at 09:29 AM.
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  #4  
Old 09/27/12, 11:05 AM
 
Join Date: Jan 2004
Location: MN
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Quote:
Originally Posted by Tom VH View Post
I would like to use 240 volt stove top elements in our smoker, a 6" 1500 watt with a temp. control knob for smoke generation and an 8" 2600 watt with a 50-250 degree thermostat. THE QUESTION: the heat elements and the thermostat have one hot lead and a neutral. How can I convert two 120 volt lines in to a single 240 volt line. I've done lots of house wiring but this has me stumped.

Thanks
Ok, you are saying you have 6 wires now:

a 120v line is typically a 14ga run of hot, neutral, and ground wires. Times 2.

Means you curtrently have 6 wires, 14ga (or are they 12ga???). Four of them will be insulated, and 2 of them will not be.

Correct?

Do you want to end up with _only_ 220v at the end of these 6 wires, or do you want 120v available there also?

How long is the run, and what else will be plugged into these lines so we know a total amp draw on them?

To do this safely, we need to know the size of the wires, the length of the wires, and how many total amps will be run down the wires. And the number of wires, which I am guessing is 6?

It will be much easier for us to give sound, safe advice if we know this, rather than specualting on what might work and then come to find things are totally different....

--->Paul
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  #5  
Old 09/27/12, 11:15 AM
 
Join Date: Jan 2004
Location: MN
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Quote:
Originally Posted by Steve in PA View Post
tie the neutral and returns together...
No. Don't tie the neutral and ground together. It messes up the whole point of the ground wire. It's wrong.

Otherwise, you have pretty good general advice on this. Be best to just start over with a proper sevice wire to the application.

If not, the rest of what you say is the general way to do it, _if_ there are the right size wires to do so for the load they will have. He'd end up with a hot, a hot, a neutral, and a ground, and one taped off unused ground and one taped off unused neutral - all of that gets real dicey if it is to code to have 2 different lines feeding to the single outlet, likely is totally ilegal, but we'll get to that once we find out the wire sizes and total current needed....

Heaters are long-term loads, so you _don't_ want to skimp on the wire size. You don't want to barely sneak by. When those heaters are on for hours at a time, they will melt down an undersized wire. It's not like a welder, that one used for short bursts of high use, and then does nothing for 80% of the time, so the wires can cool back down. A heater like this is going to really need the proper size of feed wires to it, so you don't turn the house wiring into heaters themselves!

These electrical threads are always fun, hopefully folks get actual good advice from local folk rather than relying upon dolts like myself 100's of miles away.

--->Paul
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  #6  
Old 09/27/12, 02:57 PM
 
Join Date: Jun 2002
Location: SE Washington
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If you have two runs of #12 wire I would just use one run and convert it to 220V with a 20 amp breaker. That is enough to handle 4400 watts.

Bob
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  #7  
Old 09/27/12, 09:35 PM
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Quote:
How can I convert two 120 volt lines in to a single 240 volt line.
You can't get 1 single wire with 240 to neutral on it from a 120/240 single phase service
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Old 09/27/12, 11:30 PM
 
Join Date: Jan 2004
Location: MN
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Originally Posted by sammyd View Post
You can't get 1 single wire with 240 to neutral on it from a 120/240 single phase service
Your literal explination of his question is right! However, I suppose he meant it a little different then what he actually asked.

As you say, he can't get a 240 from just a single hot wire. It will take 2 hot wires.
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  #9  
Old 09/28/12, 02:45 PM
 
Join Date: Oct 2010
Location: Central MN
Posts: 112
One 120 vac to each of the two heating element contacts and a ground wire to the metal smoker housing chassis. I located smokingmeatforums.com and found the info I needed and a good source for a PID controller and SS relay, to regulate the temp. on the big burner.
Thanks so much for your input.
Tom
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