Verifying Fan Connections With A Wiring Diagram
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I am rewiring a Table Fan Speed Control Switch: How to Verify Fan Motor Wiring Connections, Checking the Motor and Capacitor Connections. © By: Dave Rongey |
Wiring a Table Fan Motor with Capacitor
Electrical Question: I am rewiring a Table Fan Speed Control Switch.
- I have a Bionaire brand table electric fan.
- It has a 3 speed fan motor.
- The electric motor is a BM-122 Decomin brand 3 speed motor.
- There are 6 wires:
- Red wire.
- Black wire.
- White wire.
- Yellow wire.
- Gray wire.
- Blue wire.
- The motor has a 4mu 250volt capacitor.
- There are 6 wires:
- This fan has an oscillating grill with independent sync motor, and timer circuit.
- Something was wrong with the solid state circuitry (everything worked but the motor!), but a quick test of the motor indicated it does work.
- The motor uses a start and run capacitor.
- I decided to change controls to a simple mechanical switch and fore go for now anything beyond 3 speeds.
- The printed circuit board shows the following connections:
- Black wire
- Blue wire
- Yellow wire
- Are respective for the:
- High fan motor speed
- Medium fan motor speed
- Low fan motor speed
- Are respective for the:
- I think the gray wire goes out to the oscillator motor.
- The Red wire is marked as Line, for the power source.
- All wires are in continuity with each other EXCEPT RED is not with any other wire.
I see you’re a contractor, so this question might be a little out of your ballpark, but might you help me figure out how to direct wire to a mechanical switch.
Thanks.
Background: Eddie, a Homeowner from Houston, Texas.
Dave’s Reply:
Thanks for your electrical question Eddie.
How to Verify Fan Motor Wiring Connections
- Checking the Motor and Capacitor Connections
- Double check your connections using the fan wiring diagrams.
- You should see that there is a separate motor winding for high speed.
- The concern is that there is a capacitor for the motor.
- So I’m thinking that the motor may have to start with the slower speeds first.
- and not start in the high speed because the motor or capacitor has not been designed for that type of operation.
More about Electrical Wiring Diagrams
Wiring Diagrams
- Home electrical wiring diagrams are an important tool for completing your electrical projects.
- An electrical wiring diagram can be as simple as a diagram showing how to install a new switch in your hallway, or as complex as the complete electrical blueprint for your new home or home improvement project.
This link is helpful as a Homeowner
Do-It-Yourself Electrical Wiring
- Make sure not to miss these Resources for: Wiring Diagrams
The following may also be helpful for you:
Be Careful and Be Safe - Never Work on Energized Circuits!
Consult your Local Building Department about Permits and Inspections for all Electric Wiring Projects.
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