Abstract: An optical fiber cable for blown installation has a tubular central strength member about which tubes loosely housing optical fibers are stranded. The jacket is preferably formed from a high density polyethylene material and is extruded over the core on which rip cords are positioned. A water blocking compound is provided in each tube in any spaces therein which would otherwise be void. Also a water blocking material is provided between the sheath and the layer defined by the helically wound wrapping tape or binding yam in any spaces between the tubes which would otherwise be void.

Abstract: An optical fibre cable for blown installation has a tubular central strength member (114) about which tubes (112) loosely housing optical fibres (116) are stranded. The jacket (118) is preferably formed from a high density polyethylene material and is extruded over the core (100) on which rip cords (124) are positioned. Water blocking compound (126) is provided in each tube (112) in any spaces therein which would otherwise be void. Also a water blocking material (128) is provided between the sheath (121) and the layer defined by the helically wound wrapping tape (122) or binding yarn in any spaces between the tubes (112) which would otherwise be void.