Patent ID: 6933438

Claim:
A cylindrical duct having a peripheral wall with generally cylindrical inner and outer surfaces, a wire extending longitudinally of said duct between said inner and outer surfaces, said duct being of polyethylene plastic material having a first density, said wire being covered solely by an external stripe of polyethylene plastic material having a second density that is lower than said first density so that said stripe polyethylene plastic material is softer and easier to cut into than said duct polyethylene plastic material in the hardened solidified state of said duct and stripe plastic materials, said stripe polyethylene plastic material having a stripe outer surface that is exposed on said duct outer surface, said duct and stripe polyethylene plastic materials being of different colors, and said duct and stripe polyethylene plastic materials being compatibly crosslinkable and being crosslinked at an interface therebetween, whereby said stripe plastic material can readily be located and cut into with a sharp cutting tool at an end portion of the duct to expose the wire and strip same away from the duct for connection with a corresponding wire on an adjacent duct.