How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Paul Your Own Question
Paul, Electrician
Category: Electrical
Satisfied Customers: 805
Experience:  23 yrs as an electrician, self employed contractor, municipal inspector
Type Your Electrical Question Here...
Paul is online now
A new question is answered every 9 seconds

I purchased a Marathon 110/220 3/4hp electric motor to be used

Customer Question

I purchased a Marathon 110/220 3/4hp electric motor to be used for a 24" flat drum sander. To wire the motor for low volt use the wiring diagram shows the black, white and yellow wire tied together going to houshold current. The diagram does show it, I assume this connects to the ground (white) wire to houshold current. On the diagram, the purple wire is connected to household current. I'm assuming this is connected to the black wire (110v). The other 3 wires at the motor, brown, white and red are tied together, they are not connected to the household wiring. When I wired in a two terninal on/off switch, when the switch is off, the motor goes on, when the switch is off the motor is on. At the switch I have the black 110v wire from household current hooked to one terminal. The other terminal at the switch is connected to the black wire going to the motor, which is the purple motor wire. I switched the black wires at the switch and it makes no difference. What's wrong?
Submitted: 7 years ago.
Category: Electrical
Expert:  Paul replied 7 years ago.

Sounds like a bad switch. I have had new switches from the factory shorted internaly.

If you have an ohm meter you can verify this.

Paul and 2 other Electrical Specialists are ready to help you
Customer: replied 7 years ago.
So the motor and switch are wired correctly?
Expert:  Paul replied 7 years ago.

If the motor runs with the switch off, there is something wrong with the switch.


But in looking over your original question, you mention the same color wire twice in two different connections..


If this is a six wire motor usually you will have Y, BLK ,W in one group and O, R, Blu in the second. Is this what you have?

Related Electrical Questions