All of our 4 post hobbyist lifts are powered by a 110V motor and all of our commercial grade 4 post lifts are powered by a 220V motor. Normal rule of thumb is that if the 4-post lift needs to be anchored to the concrete (and is going to be used in a professional or commercial application), then it is powered by a 220 V single phase power unit.
Size (gauge) of wire is dependent on the motor horsepower of the power unit and the distance of the power unit from the power source. Consult a professional electrical contractor if you feel it necessary, but the rule of thumb electrical requirements are listed below:
4-post lift hobbyist lift requires a 15 amp 110 volt grounded power supply. Use a 10 gauge (or heavier) extension cord if needed.
4-post commercial grade lift with 220V single phase motor requires the same electrical service as a 2-post lift. (30 amp service with minimum of 10 gauge wire)
No, but if your goal is to make the electrical wiring connection to the power unit look "professional", then run the wire from the ceiling. When you try to "micro-manage" the exact position of the power unit column...and stub the wiring (in the concrete) next to the power unit column...the odds of getting it perfect are 50-50...at best. When you stub the wiring in the ceiling...you can position your lift properly and "drop the wire" directly to the power unit. You can enclose the wire in an attractive "wire cover" for a professional look.
110V power unit motors normally come with a standard 110 grounded plug. 220V motors on the power units are only available with either blank "pigtails" or œno pigtail. (the customer must furnish the pigtail). Customers must always provide the male and female ends.