A 132 kV overhead transmission line consists of four main parts: conductors, insulators, cross-arms, and the tower structure. Conductors, such as ACSR (Aluminum Conductor Steel Reinforced), transmit the electrical energy. Insulators, typically made of porcelain or polymer, prevent the electricity from flowing to the tower and the ground. Cross-arms provide the support for the insulators and conductors. The tower structure itself, which can be made of steel lattice, wood, or concrete, provides the physical support for the entire line.