What insulation material is commonly used for low-voltage electrical wires?

Plastic is commonly used as insulation material for low-voltage electrical wires due to its excellent electrical insulating properties, flexibility, durability, and resistance to moisture and chemicals. It can withstand various environmental conditions and is also lightweight, making it ideal for a wide range of applications in electrical wiring. Different types of plastic, such as PVC (Polyvinyl Chloride) and PE (Polyethylene), are frequently utilized because they provide effective insulation while being economically viable.

In contrast, while rubber does have good insulating properties, it is often used in specific applications requiring flexibility and resistance to extreme temperatures rather than general low-voltage wiring. Fiberglass is primarily used in specialty applications where high-temperature resistance and strength are crucial, rather than general wire insulation. Paper, though used in some vintage or specific applications, is not typically favored today due to its susceptibility to moisture and degradation over time.