3 wire and 4 wire Condensing Fan Motor Connection - HVAC Aug 21, 2019How to wire a condensing fan motor for 3 vs. 4 wires is a common question by new techs. Jesse Grandbois submitted this tech tip to help make it simple. Thanks, Jesse!. This is a quick one on the difference between wiring universal condenser fan motors and why brown+white is the same wire as white. This one  Difference Between 4-Wire, 6-Wire and 8-Wire Stepper Jan 10, 2019A 6-wire stepper motor is similar to a 4-wire configuration with the added feature of a common tap placed between either end of each phase as shown in Figure 2. Stepper motors with these center taps are often referred to as unipolar motors. This wiring configuration is best suited for applications requiring high torque at relatively low speeds.