The evolution of electric cable materials has been a crucial aspect of advancing electrical engineering and infrastructure. Initially, electric cables were primarily made of materials like rubber and cloth insulation, which provided basic protection but had limitations in terms of durability and safety. As technology progressed, the demand for more efficient and reliable cables grew, leading to the development of materials such as PVC (polyvinyl chloride) and polyethylene, which offered improved insulation properties and resistance to environmental factors like moisture and heat.