Can ordinary optical cables be laid overhead

Ordinary optical cables are generally not suitable for overhead installation; specialized overhead or self-supporting cables like ADSS are recommended for aerial deployment.

Key Considerations

Mechanical Strength and Environmental Exposure: Ordinary optical cables are designed primarily for underground or protected conduit installation. When exposed overhead, they are vulnerable to wind, ice, typhoons, and mechanical stress, which can damage the fibers and reduce their lifespan. Overhead cables require insulation, protective layers, and mechanical reinforcement to withstand these conditions.

Specialized Overhead Cables: For aerial installation, overhead insulated cables or all-dielectric self-supporting (ADSS) cables are used.

ADS

S cables are designed to support their own weight between poles, resist environmental stress, and maintain low optical loss. They are lightweight, small in diameter, and include strain relief for the fibers. Ordinary cables lack these features and may fail if used overhead.

Installation Requirements: Overhead optical cables require careful installation, including proper pole spacing, suspension methods, grounding, and expansion loops to accommodate temperature changes and mechanical tension. Hooks, steel pipes, or protective tubes are often used to prevent abrasion and maintain sag within safe limits. Summary: While ordinary optical cables can technically be strung overhead in short, low-stress scenarios, it is not recommended due to high risk of damage and service failure.

For reliable and safe overhead deployment, use cables specifically designed for aerial installation, such as ADSS or overhead insulated fiber optic cables, and follow proper construction guidelines.