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Thread: Could you helpful people stand one more simple question??

  1. #1
    Retired tool & Die and Mechanic Giles's Avatar
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    Question Could you helpful people stand one more simple question??

    I have a HAVC inside blower motor and housing that I would like to install as a vent fan for my shop. The wireing diagram states that the motor is 208-240v . Black wire is High speed and the Red wire is Low speed.
    There is also a Yellow wire that is labeled Common.
    Am I correct in thinking that one of the wires, Red or Black, would be connected to one hot wire and the Yellow would be connected to the other Hot wire??
    Would I connect the Neutral to the motor housing? There is a small green wire connecting the motor to the housing.
    Please correct me if I am wrong and suggest the proper way to hook this blower up.

  2. #2
    Moderator & Master Plumber hj's Avatar
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    There is NO neutral connection. The green wire is the ground which connects to the bare wire in you supply wire. Yellow/red is low speed, yellow/black is high speed.

  3. #3
    Retired tool & Die and Mechanic Giles's Avatar
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    hj--I still don't understand where the neutral wire would be connected. The green wire is only a jumper to cnnect the motor to the housing.
    I would really like to get this set up but I want to do it right.

  4. #4
    Plumber jimbo's Avatar
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    There is NO neutral wire on a 240 volt circuit. If you have a neutral, you have a 120/240 such as an old stove or dryer circuit, and maybe you do not have a ground there . proceed with caution..

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