Which type of insulation is commonly used in electrical cables?

Polyvinyl Chloride (PVC) is widely utilized as insulation in electrical cables due to its favorable properties. It offers excellent electrical insulation characteristics, is resistant to moisture, and has a good balance of flexibility and durability. PVC is also flame retardant, which enhances safety in electrical applications. Its relatively low cost compared to other insulation materials makes it a popular choice for various wiring and cabling applications. The versatility of PVC allows it to be used in a multitude of environments, from residential wiring to industrial applications, ensuring reliable performance in protecting electrical conductors from environmental factors and preventing electrical shorts.

Other materials like polyethylene and rubber are used in certain specific applications but do not match PVC's widespread use in general wiring. Polyethylene is more common in situations where additional moisture resistance and flexibility are priorities, while rubber offers excellent flexibility and is often used in extension cords and portable equipment. Silicone, known for its high-temperature resistance, is used selectively in specialized applications rather than as the primary insulation material in most electrical cables.