Selection of the utilization voltage shall be made based on economical considerations taking into account the horsepower of motors, total load, future growth, and class of service available from the power company.

Assuming that a pumping station may consist of three or four pumps, as a general guidance, for a station with motors up to 200 hp, a 480V system may be used; and for stations with motors over 200 hp, a 2,400V system or a 4,160V system may be used. Consideration has to be given to reduced voltage starting of motors to reduce inrush currents to levels acceptable to the power company or to limit the size of standby emergency power generator as the case may be. (28-ME-DG-02 § 21.1)