Thickness of butterfly-shaped optical cable wall

The wall thickness of butterfly-shaped optical cables typically ranges from 0.5 mm to 1.2 mm, depending on the sheath material and cable type.Cable StructureButterfly-shaped optical cables feature a flat, wing-like cross-section with the optical fiber unit at the center, flanked by two parallel Fiber Reinforced Plastic (FRP) strength members for mechanical support and bending resistance . The cable is then encased in a Low Smoke Zero Halogen (LSZH) sheath for indoor use or a PE/LSZH combination for outdoor applications . The wall thickness of this sheath is designed to provide mechanical protection, moisture resistance, and flexibility while keeping the cable lightweight and easy to install .Indoor vs Outdoor VariantsIndoor butterfly cables (GJXH type): Typically have a single LSZH sheath with wall thickness around 0.5–0.8 mm, sufficient for routing along walls, door frames, and inside conduits .Outdoor self-supporting cables (GJYXFCH/GJXFH type): Include additional steel wire or steel tape reinforcement and a thicker outer sheath, with wall thickness ranging from 0.8–1.2 mm to withstand UV exposure, moisture, and tensile stress during aerial deployment .Design ConsiderationsThe butterfly shape allows directional bending, minimizing stress on the fiber core when bent along the flat plane, while the wall thickness ensures fiber protection without excessive bulk . The combination of FRP strength members and the LSZH or PE sheath provides compression resistance, tensile strength, and environmental protection, which is critical for both indoor and outdoor installations .SummaryWhile exact wall thickness can vary by manufacturer and fiber count, typical FTTH butterfly optical cables have sheath walls between 0.5 mm and 1.2 mm, with indoor cables on the thinner end and outdoor, reinforced cables on the thicker end . This balance ensures mechanical protection, flexibility, and ease of installation while maintaining the cable's compact, flat profile.