3 Gang Box Wiring Diagram. Twist all four black Aubuchon Hardware: How to Install an Electric Switch. The following diagram should help you to visualize how to wire up the three switches.
How To Wire a Multiple Gang Switch Box Rough In. Two pole switching for fan units without timers. These diagrams are current at the time of publication, check the wiring diagram supplied with the motor.
Instructions: Right click on the diagram/key/fuse box you want to download.
For future expansion, I installed a three gang box, but currently it's only housing to switches.
I'd wire it and install the third switch, middle position. The link below shows the setup. A wiring diagram is a simple visual representation of the physical connections and physical layout of an electrical system or circuit.