What materials are sheathes typically made of?

Sheathes are typically made of plastic or lead due to their properties that enhance insulation and protection. Plastic is favored for its lightweight, corrosion-resistant characteristics, making it ideal for electrical applications where flexibility and durability are key. The insulating properties of plastic help prevent electrical leakage and protect the internal conductors from external environmental factors.

Lead, on the other hand, is employed in certain situations where additional shielding from electromagnetic interference is necessary. It also has excellent protective qualities but is more common in specialized applications rather than standard sheathing.

While other materials such as rubber and glass can be used for specific types of insulation, they do not have the same widespread application for sheathes as plastic and lead. Similarly, metals like aluminum and copper, while crucial in conductivity, are not used for sheathing because they do not provide the necessary insulation. Steel and silicone have their uses but are not standard sheath materials either, with steel having potential issues with corrosion and silicone typically being used more for sealing rather than sheathing.