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  • itsallgood
    started a topic Contactor and Thermostat

    Contactor and Thermostat

    Thanks to this board I've got my oven finished up, and enclosed ( 4x4x8 ). All I need to do is wire the leads going to the elements up. This is where I'm confused/concerned. Here are my questions.

    Can I use the thermostat out of a normal house oven, and run it into the contactor in the link below and be fine?

    http://cgi.ebay.com/HONEYWELL-R8234B...QQcmdZViewItem

    I'm running 3 - 3300 watt elements 220v single phase

    If not what will I need, and please include part numbers.
    Thanks in advance to anyone who will shed a little light for me.
    Last edited by itsallgood; 12-26-2006, 03:10 AM.

  • itsallgood
    replied
    Re: Contactor and Thermostat

    Okay, just wanted to make sure I ran big enough wire to each of them.
    I ran a seperate set of wires to each element, each wire was 10 ga. so I should be okay. I'm going to pick up a contact locally tomorrow so I can get this thing wired up. I have 4 complete quads to powdercoat, and only one of them being mine. I've coated several things in my fat oven (they are side by side) but nothing that I can do a frame in, but that was almost 2 years ago. Where are you guys buying your powders in small quantities from now days (10lbs or less).

    Thanks...

    Leave a comment:


  • gourdhedd
    replied
    Re: Contactor and Thermostat

    Originally posted by itsallgood
    I will get the stuff needed and may be messaging you for a little more info.
    Feel free to.

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    Originally posted by itsallgood
    What gauge of wire did you guys use that runs to the elements?
    example:

    14awg = 15amp
    12awg = 20amp
    10awg = 30amp
    8awg = I can't remember(more than 30amp)

    3300watt*220v = 15amp so if you would run a separate set of wires to each element you would only need 14awg. But like my old Voc-tech teacher told me over wire and under fuse and you'll never have to sleep with your boots on. I wired my four elements two and two so I ran two sets of 8awg (four wires) only need 10awg but over wired to 8awg. If you use the contactor from Gary's site you have lots of room for wires on the load side.

    Keep the wires out of the heat

    Hope this helps Happy New year.

    Leave a comment:


  • itsallgood
    replied
    Re: Contactor and Thermostat

    Gary,
    I just want to say "Thank You" up front. I asked this question a few months ago when I had time to start building and then I got slammed and just now getting back to finishing it up. The information you provided is very helpful. I will get the stuff needed and may be messaging you for a little more info.

    What gauge of wire did you guys use that runs to the elements?

    Leave a comment:


  • gourdhedd
    replied
    Re: Contactor and Thermostat

    Originally posted by mikekozura
    Dude, listen to Gary he's the powdercoat oven big dude. If it was'nt for Gary the Binford 5000 may have never been born. LOL LOL My first search ever on the internet last year I typed in powdercoat oven and there it was.
    Heh! I wish I could find my own site that easy!

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    Dude, listen to Gary he's the powdercoat oven big dude. If it was'nt for Gary the Binford 5000 may have never been born. LOL LOL My first search ever on the internet last year I typed in powdercoat oven and there it was.

    Leave a comment:


  • gourdhedd
    replied
    Re: Contactor and Thermostat

    Originally posted by mtumbleson
    Ok, I'm starting to get it.

    So, to add on that; would I need a contactor with as many poles as I have elements, or can I double them up?
    Nope, two poles are all that's required. Each pole attaches to an opposite end connection of the elements. You'll have the same number of wires terminated in each pole as you have elements.

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    No, thank you very much that was very kind... I thought I just had a lot of bullsh@t. Just glad I can help. Need anything just pm or e-mail.

    Leave a comment:


  • mtumbleson
    replied
    Re: Contactor and Thermostat

    Thank you so much, you communicate what you know very well, it's a relief from your average response.

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    Poles and elements have nothing to do with each other. Poles have to do with how many hots you have. 220v single phase = 2 poles 120v volts between each side and neutral.
    On the load side of the contactor you can fit more than one wire in the lugs and there's also male spade connecters. So I guess the answer to your double question is yes.
    Now elements are directly related to the amp of the contactor say you have three at 3300 watts at 220 volts your going to draw 45 amps. watts*volts=amps

    Poles = power supply / amps = elements*volts

    Leave a comment:


  • mtumbleson
    replied
    Re: Contactor and Thermostat

    Originally posted by mikekozura
    In a house oven your only running one element at a time. You need a contactor that can handle the amps of more than one element running at a time. 3300watt * 220v = 15amp now times that by the number of elements. You know what I meen jelly bean LOL LOL

    No need to be sorry dude it's that question thing....
    Ok, I'm starting to get it.

    So, to add on that; would I need a contactor with as many poles as I have elements, or can I double them up?

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    In a house oven your only running one element at a time. You need a contactor that can handle the amps of more than one element running at a time. 3300watt * 220v = 15amp now times that by the number of elements. You know what I meen jelly bean LOL LOL

    No need to be sorry dude it's that question thing....

    Leave a comment:


  • mtumbleson
    replied
    Re: Contactor and Thermostat

    Originally posted by mikekozura
    Mtumbleson :
    The contactor is what turns the elements on and off. It's controled by the coil and thermostate. The thermostate is like a light switch in your house it turns the coil on and off witch inturn sents the voltage to the elements.

    YES, you have everything you need except the contactor and some wire.

    Good luck and Merry Christmas
    If my donor ovens are complete and working as they are, why is the contactor necessary? (Sorry, I'm just trying to completly understand it)

    Leave a comment:


  • mikekozura
    replied
    Re: Contactor and Thermostat

    You got it dude... just run the coil circuit from one side of your 220v oven feed. Run the hot through the thermostat (like a light switch) and then to the coil and run the neutral straight to the coil on the contactor. The thermostat tells the coil when to energize to complete the 220v circuit to the elements and vise versa. I talk to much, later.....

    Leave a comment:

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