Transposition is the practice of periodically changing the physical positions of the three phase conductors along the length of a transmission line. This is done to balance the electrical properties (inductance and capacitance) of each phase. When conductors are spaced irregularly, as is common in many tower designs, their electrical parameters can become unbalanced, which can cause power transfer between phases and lead to induced voltages in nearby communication lines. By transposing the conductors, each phase occupies each position for an equal distance, ensuring that the overall inductance and capacitance per phase are equalized, preventing unbalanced currents and voltages.