Installation of ADSS 24-core optical cable

The installation of a 24-core ADSS optical cable requires careful handling, adherence to safety standards, and controlled tension methods to prevent fiber damage.

Cable Specifications

The 24-core ADSS cable typically contains 6 cores per tube of single-mode ITU-T G.652.D fiber, supplied on drums with lengths around 4,000 meters, and is designed for outdoor aerial applications. The cable meets standards such as ISO9001, IEEE, IEC, EN, TIA/EIA, IEC60793, and IEC60794. The ends of the cable are capped to prevent moisture ingress, and the outer sheath is designed to resist abrasion and environmental stress .

Safety Precautions

• All personnel must be trained and physically qualified for aerial work and familiar with OSHA regulations, NESC, and local power industry safety rules .
• Use leather gloves when handling the cable or climbing poles, and rubber gloves near live circuits .
• Employ safety harnesses, body belts, and safety straps on bucket trucks or aerial lifts .
• Inspect poles or towers for deterioration, splintering, insect nests, or sharp protrusions before climbing .
• Avoid installation during extreme weather conditions such as strong winds, rainstorms, or thick fog .

Installation Methods

Stationary Reel Method

• Position the cable reel at one end of the span and a take-up reel at the other end .
• Thread a pull line through travelers and balance the travelers.
• Attach the ADSS cable to the pull line using a woven wire pulling eye.
• Pull the cable under controlled tension, ensuring the minimum bending radius is not exceeded to prevent fiber damage .

Controlled Paying-Off

• Maintain stable pulling tension throughout the installation.
• Avoid friction, collisions with poles, towers, or the ground, and do not use metallic tools that could scratch the cable .
• Seal cable ends with waterproof adhesive tape to prevent moisture ingress .

Mechanical and Environmental Considerations

• ADSS cables have high tensile strength and low thermal expansion, minimizing sag due to temperature changes .
• Ensure the cable is not subjected to excessive tension, crushing, or bending beyond the recommended radius .
• The cable should withstand environmental tests such as water immersion and mechanical holding time as per IEC 60794 standards .

Best Practices

• Only experienced personnel should perform installation.
• Use insulated tools and ropes for work aloft.
• Position motorized equipment so exhausts do not interfere with the work area .
• Monitor tension and sag continuously to prevent fiber attenuation or breakage . Following these guidelines ensures a safe, efficient, and reliable installation of a 24-core ADSS optical cable while maintaining the integrity of the optical fibers and compliance with industry standards.