Results 1 to 8 of 8
  1. #1
    Join Date
    Jul 2010
    Location
    Brisbane
    Posts
    143

    Default Wiring a Betts Appliance motor

    I have this Betts motor that the previous owner had running a grinding wheel... it has only 3 wires coming from the motor.. red , black and white.
    the fellow used only the red and black and snipped the white one.
    Although it runs, it does not always do so in the same direction !!!... sometimes it sits and hums .. There is no capacitor or centrifugal switch fitted.
    Attached Images Attached Images

  2. #2
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    What's your question(s) ?

    I'll take a guess?

    The fact that it sometimes sits and hums (if you leave it doing that too long it will cook the run coil) suggests the start coil is not hooked up and that's what the white connection is probably for. The start coil usually has a cap in series to generate the phase shift needed to start the motor.

    Being an open frame motor it's designed to be inside an appliance so it should really be enclosed and then if it doesn't have one it will need a fan.

  3. #3
    Join Date
    Jul 2010
    Location
    Brisbane
    Posts
    143

    Default

    Thanks BobL...
    3 things...
    1.. What size cap would I need ?
    2.. Will I need a Start or a Run Cap ?
    3.. White wire to one side of the Cap... but where do I connect the other wire to ?
    As for cooling...It has a fan on either end of the rotor... should be OK as long as I position the vents downwards ..

  4. #4
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Quote Originally Posted by kenny_10 View Post
    Thanks BobL...
    3 things...
    1.. What size cap would I need ?
    2.. Will I need a Start or a Run Cap ?
    3.. White wire to one side of the Cap... but where do I connect the other wire to ?
    As for cooling...It has a fan on either end of the rotor... should be OK as long as I position the vents downwards ..
    Humm . . . . I'm not comfortable in responding to these questions - I'll leave it to someone else if they wish to take the risk.

  5. #5
    Join Date
    Jul 2010
    Location
    Brisbane
    Posts
    143

    Default

    Thanks BobL... I understand.

  6. #6
    Join Date
    Jan 2004
    Location
    Mackay North Qld
    Posts
    6,446

    Default

    DISCLAIMER

    No liability is accepted by MetalWork Forum's administrators
    or moderators for advice offered by members posting replies
    or asking questions regarding electrical work.
    We strongly advise contacting a Licensed Tradeperson for all electrical work.

    WARNING

    Information supplied within posts is not to be considered as detailed formal instructions to complete a task.
    Members following such information do so at their own risk


    Updated by Grahame - 29-9 -17 6.46 PM

  7. #7
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

    Default

    10mfd or thereabaouts

  8. #8
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Kenny,

    Have you contacted "Betts" ?

    For that size motor 8 to 12 uf is a common size. The capacitor is usually wired between red and white with black being common or neutral, live going to red or white depending on which way the motor runs. You will need a continuously rated 275 volts AC or higher voltage capacitor.

    Usual disclaimer applies.
    Best Regards:
    Baron J.

Similar Threads

  1. Single Phase Motor Wiring
    By grunto in forum METALWORK GENERAL
    Replies: 2
    Last Post: 18th Sep 2015, 12:26 PM
  2. Single phase induction motor wiring help needed
    By simonl in forum METALWORK GENERAL
    Replies: 9
    Last Post: 21st Apr 2012, 05:23 PM
  3. Star/Delta motor wiring
    By .RC. in forum METALWORK GENERAL
    Replies: 33
    Last Post: 3rd Mar 2012, 11:01 PM
  4. Wiring of a single phase motor.
    By krisfarm in forum METALWORK GENERAL
    Replies: 27
    Last Post: 28th Oct 2010, 08:10 PM
  5. motor wiring diagram
    By .RC. in forum METALWORK GENERAL
    Replies: 2
    Last Post: 12th Jul 2010, 07:37 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •