What materials are typically used for power line insulation?

The correct answer is based on the properties and applications of various insulating materials used in power lines. Rubber, plastic, and composite materials are commonly chosen for power line insulation due to their excellent electrical insulating properties, durability, and resistance to environmental factors.

Rubber offers good flexibility and resistance to heat and moisture, making it suitable for various electrical applications. Plastics, such as polyethylene and polyvinyl chloride (PVC), are widely used for their robustness and ability to insulate against electrical current while being lightweight. Composite materials blend the advantages of different materials, providing enhanced mechanical strength and thermal stability, which are crucial for maintaining the integrity of high-voltage lines over time.

These materials help to ensure that electrical currents conduct efficiently while preventing accidental contact and potential accidents that could result from electrical faults, thus creating a safer environment for both infrastructure and personnel involved in maintenance.