Help on wiring a drum Switch to a single phase 230v motor
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  1. #1
    Join Date
    Jul 2007
    Nouth Carolina
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    Default Help on wiring a drum Switch to a single phase 230v motor


    I my experience is over 40years old and it did not include wiring a drum switch inline with a motor.
    My two lathes came with a 1/4hp and a 1/2hp motor wired to drum switches. I am only going to provide information on one today since the other one has a very old drum switch which I will have to take apart and take pictures of.

    I hired a electrician to wire both of them up after the seller had disconnected the wires to pack the motors for me to pickup. Well they didn't copy which wire went to which terminal etc. I hired a Electrician and since they were both 115v/230v reversible motors I asked him to wire them for 230v. Well he tried and one motor ran in both directions but started to smoke. The other just hummmmed. He mumbled that the starter capcitors were bad and he left. So I bought to motors that are 1/2 hp 115v/230v reversible and asked him to come back but he hasn't. So I need help with the wiring.

    The one I like to work on at the moment so I don't get confused is the following:

    1. drum switch

    Motor: Sears
    Model # YWL-24660
    HP 1/2
    Volts 115v/230v
    Amps 10.6/5.3
    PH 1
    RPM 1720
    MFG. NO. 311P899
    SER A RL
    Code k
    CYC 60

    I have already internally changed the wiring to 230v as you will see in the picture title Motor Terminal.
    Also I will include pictures of the Drum switch wiring diagram and the drum switch it self.
    The connections in the drum switch were labeled with letters vice numbers so at first it was confusing until I made a diagram and put the numbers beside them.

    In the picture you will see the old motor where the previous owner had the wire nutted connections sticking out of the old motor. I will disconnect all the wiring from the motor and remove the old motor.

    So that I understand I will need some one to explain where the incoming power cord (Black, White and Green wire are wired to on the drum switch and the black, white and green wire that will leave the drum switch and go to the motor and what terminals it gets wired two.

    I have added pictures and they are as follows:

    1. drum switch wiring schematic
    2. Left side of drum switch
    3. Right side of drum switch
    4. drum switch wiring
    5. Old motor and wiring
    6. Old motor and wiring
    7. Old motor and wiring
    8. .5 motoring wiring schematic
    9. .5 Motor wiring terminal

    I will upload pictures 4 through 7 on another message.

    Any help will be greatly appreciated1

    Attached Thumbnails Attached Thumbnails .5hp-motor-wiring-schematic.jpg   .5hp-motor-wiring-terminal.jpg   1.-drum-switch-wiring-schematic.jpg   2.-left-side-drum-switch.jpg   3.-right-side-drum-switch.jpg  

  2. #2
    Join Date
    Jan 2010
    Indianapolis, Indiana, USA
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    Perhaps you have left and will never come back...

    But if you do come back here, or go back to shopfloortalk, anyone wanting to help you needs to know what sort of motor you have.

    I have studied that drum switch diagram, a bit, and it has several options, depending on what sort of motor.

    The easiest hookup is a three phase motor, just swap any two of the wires.

    And then it gets messy.

    Of the three (out of six) diagrams with a title, you have:

    "induction repulsion"
    "split phase"
    "single phase"

    Is your motor declared as one of those?

    The shopfloortalk member that noticed your situation was all about swapping internal motor connections has zeroed in on the problem with doing something like this long-distance.

    You really need to find a motor repair shop and pay their rate. Peace of mind is priceless.

    An "electrician" is not the proper job title.

    I don't think "plant electrician" is adequate, nowadays, since many factories just call in a specialist as needed.

    So....locate a business that deals in industrial controls, motors, etc. and hope they will work with you on solving your problem.

    Good Luck,

  3. #3
    Join Date
    Mar 2008
    suburban detroit
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    All the infromation you need is on the two diagrams you have included.

    The incoming power lines (black, white) go to terminals 2 and 6. Incoming green wire (ground) goes to a good metal grounding point on the motor. The motor terminals denoted as "LINE" go to terminals 1 and 5. The "red" and "black" wires in the motor go to 3 and 4. Let's say you conect the red wire to 3, and the black to 4. If you find that the motor runs forward when the switch is in the positon you associate with reverse, swap red to 4 and black to 3.




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