Patent ID: 8878066

Claim:
A power transmission cable comprising: at least two power conductors; an insulating layer surrounding each power conductor to form at least two insulated conductors; a bedding layer surrounding the at least two insulated power conductors; and a flame-retardant halogen free protective sheath provided in a radially external position with respect to said bedding layer, wherein: said sheath has a polymer material inner layer in contact with a polymer material outer layer, said inner layer has a thickness at least equal to a thickness of said outer layer, the polymer material of the inner layer has a glass transition temperature equal to or lower than −30° C.; wherein the polymer material of the outer layer is mud resistant, wherein the polymer material of the outer layer is either an alkylene/alkyl acrylate copolymer or a mixture of alkylene/alkyl acrylate copolymers, wherein the polymer material of the outer layer has an average content of alkyl acrylate comonomer equal to or higher than 40% by weight with respect to the weight of the copolymer or copolymers, and wherein the polymer material of the outer layer has a glass transition temperature, Tg, equal to or lower than −20° C.