Diameter of 288-core ribbon optical cable

The diameter of a 288-core ribbon optical cable typically ranges from 18 mm to 25 mm, depending on the manufacturer and cable construction.OverviewA 288-core ribbon optical cable is designed for high-density data center or telecom applications, often using 12-fiber ribbons arranged in multiple stacks or subunits for mass fusion splicing and MPO-style terminations . These cables can be indoor, riser-rated, or armored depending on the installation environment . The overall diameter depends on factors such as:Number of ribbons and stacking method (single tube vs multiple subunits)Presence of strength members (dielectric or steel)Type of outer jacket (LSZH, flame-retardant, armored)Water-blocking or gel-free designTypical DimensionsIndoor riser or distribution cables: 288 fibers in a single tube with 12-fiber ribbons usually result in a diameter around 18–20 mm .Armored or heavy-duty cables: Interlocking aluminum or steel armor for crush resistance can increase the diameter to 22–25 mm .Loose tube or outdoor variants: Stranded loose tube designs with gel-free filling may also fall within the 20–24 mm range .Additional ConsiderationsBend radius: High-fiber-count ribbon cables require careful handling; the minimum bend radius is typically 10–15 times the cable diameter for installation.Weight and flexibility: Armored cables are heavier and less flexible, which may affect conduit sizing and routing.Ribbon access: 12-fiber ribbons are designed for easy mass fusion splicing, and subunits may be finger-peelable for faster termination . In summary, while the exact diameter varies by manufacturer and cable type, a 288-core ribbon optical cable generally measures between 18 mm and 25 mm, with armored or outdoor variants at the higher end of the range. This range should be used for planning conduit space, cable trays, and installation logistics.