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Thread: Electric Workshop Heater

  1. #1
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    Feb 2008
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    Electric Workshop Heater

    I just ordered this heater from Amazon

    https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

    It is 220v 31a. I will put in a 40 amp breaker in the main panel for this.
    What wire should I use?

  2. #2
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    Pretty sure #8, but do I need 8-2 or 8-3

    The 8-2 has 2 hots and one ground total of 3 wires in the casing

    The 8-3 has 4 wires in the casing. I don't think I will need to get 110v out of the cable.

  3. #3
    Join Date
    May 2007
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    Depends on if there is a case ground, which you would need 8/3.

    Sent from my SM-T710 using Tapatalk
    Darren

    To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault

  4. #4
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    Well, had a little more time to google, and I think this is the owners manual for the unit you ordered. If so, 8/2 should suffice, according to diagram 7B, page 4...

    http://www.marleymep.com/sites/defau...-11195-000.pdf
    Darren

    To a small child, the perfect granddad is unafraid of big dogs and fierce storms but absolutely terrified of the word “boo.” – Robert Brault

  5. #5
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    Quote Originally Posted by Darren Wright View Post
    Well, had a little more time to google, and I think this is the owners manual for the unit you ordered. If so, 8/2 should suffice, according to diagram 7B, page 4...

    http://www.marleymep.com/sites/defau...-11195-000.pdf

    Yep - shows it on Fig 6 page 3 also.

    I will get the 8-2 wire.

  6. #6
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    Jan 2007
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    Sacramento, CA
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    I have the 5kw version of that heater. It's very good. You should have no trouble with it at all!
    Jason Beam
    Sacramento, CA

  7. #7
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    Quote Originally Posted by Jason Beam View Post
    I have the 5kw version of that heater. It's very good. You should have no trouble with it at all!
    Jason, you have been in my shop, and you know my winters are colder than yours. I trust your judgement.

  8. #8
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    Quote Originally Posted by Leo Voisine View Post
    Jason, you have been in my shop, and you know my winters are colder than yours. I trust your judgement.

    Yep - our space is pretty similar - as long as you're insulated, the 7.5kw should do plenty. I keep mine on the lowest setting on the worst days and it can easily keep it over 75 in there on 30 degree days. I have R15 in the walls and ceiling and an R13 garage door. About 450-500sqft.

    The thing I love about it over radiator type heaters is that i don't have to maintain a temperature. I can go out there when it's cold, kick the heat on and have the forced air warm ME up before anything else and that helps. Once the slab and all the iron come up to temp, it hardly runs at all - maybe for 2 minutes every 15 ...

    You should have no problem
    Jason Beam
    Sacramento, CA

  9. #9
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    I have R13 in the walls and the ceiling has R19. The windows are all low E double pane and quite efficient. The Garage doors are made in Canada where they know about cold.

    My floor in winter does not warm up. It's too cold to be barefoot in winter.

    I still have my 60,000 BTU propane heater and that will stay for many years.

    I just want to minimize the propane usage. I would LOVE to eliminate the propane.

    The electric is basically free, so it's a lot cheaper than the propane.

  10. #10
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    Aug 2007
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    Really wish my garage was insulated. Would be cool to have something like that out there to warm things up.
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