For short transmission lines if resistance is neglected, the maximum power which can be transmitted per phase is equal to
Where Vs and VR are the line-to-neutral voltages at the sending and receiving ends of the line and X is the inductive reactance of the line. This relationship will become apparent in the study of Chap. 6. If the magnitUdes of Vs and VR are held constant, and if the cost of a conductor is proportional to its cross-sectional area, find the conductor in Table A.3 which has the maximum power-handling capacity per cost of conductor at a given geometric mean spacing.