Diameter of 24-core outdoor optical cable

The outer diameter of a 24-core outdoor optical fiber cable typically ranges from 9 mm to 16 mm, depending on construction type and armoring.Typical Cable Constructions and DiametersLoose Tube Gel-Free Cables: For example, Corning ALTOS® 24-fiber outdoor loose tube cables use a medium-density polyethylene (PE) jacket and SZ-stranded loose tube design. These cables generally have an outer diameter around 9–12 mm for 24 fibers, depending on the tube and jacket thickness .Multi Loose Tube Armored Cables: Belden GBIHC24 24-fiber outdoor cables consist of 6 tubes of 1.9 mm diameter each, with aramid yarns, steel wire armoring, and a PE outer jacket. The overall outer diameter for this type of armored cable is typically 14–16 mm .Aluminum Tape Armored (GYTA) Cables: GYTA 24-core outdoor cables feature oil-filled PBT loose tubes around a central steel wire, with aluminum tape laminated and a PE sheath. These cables usually have an outer diameter in the range of 10–13 mm .Unitube Armored Cables: Single-sheathed armored 24-fiber cables with corrugated steel tape and HDPE jacket also fall within the 12–16 mm range, depending on the number of fibers and armor thickness .Factors Affecting Outer DiameterNumber of loose tubes: More tubes increase the cable diameter.Fiber type: Single-mode or multimode fibers have similar diameters, but buffer thickness may vary.Armoring: Steel wire or aluminum tape armoring adds 2–4 mm to the overall diameter.Water-blocking and jacket thickness: PE jackets and water-blocking materials contribute to the final size.SummaryFor a 24-core outdoor optical cable, the outer diameter generally ranges from 9 mm for non-armored loose tube designs to 16 mm for fully armored, rodent-protected cables. When selecting a cable, consider the installation environment (duct, aerial, or direct burial) and whether armoring or additional protection is required .