230 Volts Single Phase. Your air conditioner, clothes dryer or electric stove. The main entry power for most new houses. 208 Volts Three Phase. Power companies like it for subdivisions where street lighting is involved.
Motors hate it.
Power companies don ' t care. Very useful in small industrial and commercial and farm applications. 460 Volts Three Phase, The common heavy industrial and large pump supply. Carries the most energy with the smallest wires and starters. Comes and gets you if you are careless.