What are the functions and requirements of the inner sheath?

Jan. 10, 2025

The inner sheath is a protective covering layer covering the cable insulation layer, which is used to protect the insulation layer from moisture, mechanical damage, light and chemically aggressive media, and can also flow short-circuit current. The inner sheath includes metal staggered sheath, flat aluminum sheath, corrugated aluminum sheath, copper sheath, composite sheath, non-metallic plastic sheath and rubber sheath. Plastic sheath (especially polyvinyl chloride sheath) can be used for various plastic insulated cables; rubber sheath is usually used for rubber insulated cables. The requirements for the inner sheath can refer to relevant standards or be selected according to the different places where the cable is used.

What are the functions and requirements of the inner sheath?cid=9