IMPERVIOUS CABLE

PROBLEM TO BE SOLVED: To provide a cable superior in its water barrier performance and having no problem on environment aspect by constructing a water shield layer of only a non-metal material, composed of olefin polymer being the same type of plastic as that of sheath. SOLUTION: A cable core 1 has on its conductor 2 an inner semiconducting layer 3 made of semiconducting polyethylene, an insulating layer 4 made of polyethylene or cross-link polyethylene and an outer semiconductive layer 5 made of semiconductive polyethylene, in order. On the core 1, a wire shield 6 and a retaining tape layer 7 are provided in the order, and on the layer 7 a water shield layer 8 is formed with a non-metallic tape made of olefin polymer serving as a water shield tape. On the layer 8, a plastic sheath 9 composed of a composition having the same type of olefin polymer as that of impervious layer material as a base polymer is provided. The water penetration amount of the layer 8 should be 1.0 g/m2-day or less than.