Drum switch

Thread Starter


Joined Feb 8, 2014
Hi, I have a single phase 110 motor that can be change to 220.
but I have it on 110
it has black white red yellow wires on the motor
I open the plate and it has 135 246 forward and 136 245 backwards
I have a square d drum switch
How do I hook it up


Joined Jul 17, 2007
Your Square D drum switch originally came with rather extensive instructions for wiring up myriad motors; one that I wired up many years ago had over 30 diagrams on it.

You need to find the diagram that matches your motor.

If your drum switch did not come with the instruction sheet(s), you can go to their website:
and click on the Support link to find the documentation for your product.
If you cannot find the documentation for your exact Square D product, give them a call. They have engineers available to answer your questions on your Square D product, and how to use it.