The outer jacket of loop lead-in cable is typically made of which material?

The outer jacket of loop lead-in cable is typically made of polyethylene due to its advantageous properties. Polyethylene is known for its durability, chemical resistance, and flexibility, which makes it ideal for outdoor environments where loop lead-in cables are often installed. This material can withstand various weather conditions, including exposure to moisture, ultraviolet (UV) light, and temperature fluctuations, helping to ensure the longevity of the cable.

In addition, polyethylene provides good electrical insulation, which is crucial for maintaining the integrity of the signals transmitted through the loop sensors. The combination of these characteristics not only protects the inner components of the cable but also minimizes maintenance needs and increases the reliability of traffic signal systems.

While the other materials listed might have their applications, they typically do not offer the same balance of properties required for the harsh conditions that loop lead-in cables regularly encounter.