What materials are commonly used for electrical insulation?

The correct answer identifies PVC, rubber, and thermoplastics like polyethylene as commonly used materials for electrical insulation. These materials are specifically designed to resist the flow of electrical current, thus preventing unwanted energy transfer and protecting both users and electrical systems.

PVC (polyvinyl chloride) is widely used due to its excellent insulating properties, durability, and resistance to moisture and chemicals. Rubber, another effective insulator, provides flexibility and is often used for insulation in various environments, particularly in applications where bending or movement is required. Thermoplastics like polyethylene offer lightweight and highly effective insulation qualities, making them ideal for use in a variety of electrical cables and components.

These materials are preferred in electrical installations to enhance safety, reduce the risk of electrical faults, and ensure reliable performance of electrical systems.