View Full Version : Drum switch and motor wiring question

03-07-2016, 05:43 PM
I am a new member to the site and truly appreciate any assistance. I know this topic has been covered many times in this forum but could not find any suggestions for my situation. I recently bought a South Bend 9" lathe and have a motor and drum switch that I would like to wire up with the option of using reverse. Here are the specs of the motor and switch:

Motor- 1/3 hp, capacitor start branded Jet but listed on the data plate as manufactured by Emerson. The motor is reversible and can be switched from low to high voltage. I will be keeping it wired low voltage. The data plate shows the motors internal wires (orange, red and blue) attached to post 1 along with an ungrounded line and internal wires (yellow and white) on post 4 with a line.

Switch- Furnas L-143 drum switch. The drum switch has 6 posts (L1, L2, 1, 2, 3, and 4).

Thank you for your valued assistance and any "wiring for dummies" advice.

03-07-2016, 06:52 PM
I know others will chime in but if it is a 110 volt motor, google image search (110v drum switch wiring) is your best friend!

03-07-2016, 07:41 PM
We need to see the wiring diagram on the switch and the motor.


03-07-2016, 08:01 PM
These are the easiest instructions I have found. You can check your switch action in the top portion.

http://s16.postimg.org/5c7xgouu9/Drum_Switch_Motor_Reversing_Wiring_Diagram_1_A.jpg (http://postimg.org/image/5c7xgouu9/)

03-07-2016, 08:13 PM
I think he has one of the round switches you see on an Atlas, which has a pretty different layout than the usual rectangular furnas switch.


03-07-2016, 08:35 PM
That diagram (top of the first photo) should apply to any drum switch whose switching actions are like the connections shown. You can easily follow the switching action with a test light to confirm that.

03-07-2016, 09:45 PM
those links are nsfw

Paul Alciatore
03-08-2016, 02:34 AM
I think this may help. When I opened my Furnas drum switch I found the wiring diagram inside it was falling apart. So I reproduced it. This is an accurate copy.

http://img.photobucket.com/albums/v55/EPAIII/Web%20Post%20Photos/South%20Bend%209/DRUMSW7E1_zpsiexzgsbb.jpg (http://smg.photobucket.com/user/EPAIII/media/Web%20Post%20Photos/South%20Bend%209/DRUMSW7E1_zpsiexzgsbb.jpg.html)