"220V Cooling Fan" 220 V single-phase capacitor motor main winding, a total of four secondary winding wire, it is common in the motor is connected, and lead, so there are three leads. 220 V single-phase shaded pole motor, there are shaded pole winding (short ring similar exchanges and contacts on the core), the winding is short-circuited, no lead, so only two wires on the pole core. Shaded pole motor wiring is simple, but less efficient; better capacitance motor performance, but relatively cumbersome wiring, but also easy to damage the capacitor. Both have their advantages.