Assume a square shaped distribution substation service area as shown in Fig.2(d). The square area is 4 km2 and has numerous three phase laterals. The design engineer has the following design data which are assumed to be satisfactory estimates: The load is uniformly distributed and the connected load density is 2000 kVA/km2 . The demand factor, which is average value for all loads, is 0.6. The diversity factor among all loads in area is 1.2. The load power factor is 0.9 lagging, which is an average value applicable for all loads. For some reasons (due to excessive distance from load center or transmission lines or other reasons), the only available substation sites are at locations A and B. If the designers selects site A as the substation location, there will be a 2 km long feeder main and 16 three phase 2 km long laterals. On the other hand, if the designer selects the site b as the substation location, there will be a 3 km long feeder main (including a 1 km long feeder main) and 32 three phase 2 km long laterals. The designer wishes to select the better one of the given two sites by investigating the total peak load voltage drop at the end of the most remote lateral, i.e. at point 'a'. Assume 7.62 / 13.2 kV feeder and lateral with K values as 0.0004 and 0.00095 respectively.