Squirrel cage fan from microwave

Discussion in 'The Projects Forum' started by themow, Sep 18, 2014.

  1. themow

    Thread Starter New Member

    Dec 28, 2012
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    I pulled the fan from my old microwave. I want to make it a destop fan. Its got a diagram which is attached. I know it needs a cap. Just not sure where to put the power, neutral, ground, switch. Sorry for the simple questions. Thanks
     
  2. faley

    Member

    Aug 30, 2014
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    Seems kind of "Rube Goldberg-ish" to me. To be honest, you have the diagram which, indeed, shows the connections about which you ask. This concerns me. No offense, but are you sure you're capable of safely wiring the device?
     
  3. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    Cap shoen connected between red and yellow. AC power is on blue and split on black/white. the split is for a dual speed arrangement. only testing will reveal which lead is high or low.
    use a double throw center off switch if you want high and low speeds
     
  4. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    to be clear
    wire one side of ac line to blue. other side of ac line goes to switch. white and black go to switch. cant post drawing from this phone. if you need wiring diagram for switch another member will help if you ask.
     
  5. themow

    Thread Starter New Member

    Dec 28, 2012
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    Safely? yes, as long as I know what to do

    Thanks, I'm Clear on the cap part. Regarding "AC power is on blue and split on black and white." Just to make sure Im following. Neutral goes to blue then hot to switch or to white or black depending on high/low.

    Was composing post and ddint see your follow up. I think Im clear now
    Thanks a bunch

    I think I got it. And would this be a dual throw single pole switch?
     
    Last edited: Sep 18, 2014
  6. faley

    Member

    Aug 30, 2014
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    Neutral is Blue. (IEC color code)

    The switch should be a 3 position, if kermit2's suspicions are correct. The type you need is commonly called an HOA (Hand-Off-Auto) in the industrial world. The center position being off.

    Regarding ground, if there is no terminal and you desire a ground connection, you will have to make a bond point on the metal chassis or frame, preferably on the same frame as are found the other connections.
     
    Last edited: Sep 18, 2014
  7. Kermit2

    AAC Fanatic!

    Feb 5, 2010
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    single pole dual throw with detent, or center off
     
    themow likes this.
  8. faley

    Member

    Aug 30, 2014
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    Sorry kermit2- didn't mean to bump you in my edit. I saw that you appeared to be at a disadvantage (using a phone) and tried to fill in some of the blanks. Again, my apologies.
     
  9. MaxHeadRoom

    Expert

    Jul 18, 2013
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    They are a little unclear as to their decimal points, but that would be a 6µf not .6µf.
    Also make sure you use a AC motor rated cap, not an electrolytic or similar.
    Max.
     
  10. themow

    Thread Starter New Member

    Dec 28, 2012
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  11. #12

    Expert

    Nov 30, 2010
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    Disagree. 6uf is common enough on 1/4 HP to 1/3 HP motors. This one is 130 Watts input power for about 1/7th of a horse.
    I say, "Try the 0.6 uf capacitor". If it's wrong, that sucker won't start.

    Hang on. The spacing on that dot seems to indicate that it IS 6 uf. Sorry.
     
  12. #12

    Expert

    Nov 30, 2010
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    A huge voltage rating will not cause any problems.
     
  13. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Ebay 321263751743 free shipping.
    Max.
     
  14. themow

    Thread Starter New Member

    Dec 28, 2012
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    I bought that exact item an hour ago. Thanks you guys run a great forum!
     
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