48 core underground optical cable diameter

The typical diameter of a 48-core armored underground fiber optic cable (GYTY53 type) ranges from approximately 14 mm to 16 mm.

Cable Structure and Diameter Considerations

A 48-core underground fiber optic cable, such as the GYTY53, is designed for direct burial and long-distance transmission. Its structure includes:

• Loose tube design: Fibers are housed in water-blocked loose tubes, allowing free movement and stress relief.
• Steel wire or metallic strength member: Positioned at the center to provide mechanical strength.
• Double steel tape armor: Protects against mechanical damage and rodent attacks.
• Dual polyethylene (PE) jackets: Provide moisture resistance and environmental protection. The combination of these layers contributes to the overall cable diameter. For a 48-core configuration, fibers are typically organized into 4 to 6 loose tubes, which are stranded around the central strength member .

Typical Diameter Range

Based on industry standards and the GYTY53 specifications:

• Outer diameter: Approximately 14–16 mm
• Weight: Around 200–250 kg/km depending on armor and jacket thickness
• Installation: Suitable for direct burial without conduit, though conduit may be used for additional protection

Additional Notes

• The exact diameter may vary slightly depending on the manufacturer, fiber type (singlemode or multimode), and armor thickness.
• For planning purposes, always consult the manufacturer's datasheet to confirm precise dimensions for trenching, duct sizing, and pulling tension calculations.
• The cable is designed to maintain low attenuation and high bandwidth, making it ideal for backbone and LAN fiber networks . This diameter range ensures compatibility with standard underground installation practices while providing robust protection for high-capacity fiber networks.