Communication optical cable binding wire iron core binding wire

Binding wires, including iron core and steel messenger wires, are essential for securing and supporting communication optical cables, ensuring mechanical stability and longevity.

Optical Cable Structure and Strengthening

Communication optical cables consist of a cable core at the center, which houses the optical fibers and maintains their transmission performance under external forces. To withstand mechanical stress, optical cables include strengthening members, which can be placed either centrally (common in Europe and Japan) or around the outer sheath (common in the United States). These members are critical for preventing fiber damage during installation and operation.

Messenger Wire and Iron Core Binding Wire

Messenger wires are metallic support wires, typically made of steel, used in aerial fiber optic cable installations. They provide structural support to prevent sagging and maintain proper tension over long spans. Key characteristics include: Material: Steel, often galvanized or stainless, to resist corrosion and environmental degradation.

Standards: ASTM 475 for metallic-coated steel wire strands and ASTM A228 (music wire) for optical cable applications. Strand Count: Available as single-strand or multi-strand (3, 7, or 19 wires) depending on required strength. Function: Supports aerial cables, prevents sagging, and extends cable lifespan.

Not suitable for ground wire applications or short cable runs where extra support is unnecessary. Iron core binding wire or lashing wire is used to secure the optical cable to the messenger wire. This is typically done using a spiral wrapping technique with a lasher machine, which tightly binds the cable to the support wire, ensuring stability and protection against wind, vibration, and mechanical stress.

Stainless steel lashing wires are commonly used, meeting ASTM A580 specifications for durability and corrosion resistance.

Applications and Benefits

Aerial Installations: Messenger and binding wires are essential for telephone poles, utility lines, and long-distance fiber runs. Mechanical Protection: Prevents fiber breakage due to tension, bending, or environmental factors. Longevity: Corrosion-resistant coatings and proper lashing extend the operational life of optical cables.

Flexibility: Available in various grades and diameters to match specific project requirements.

Summary

In fiber optic networks, messenger wires provide structural support, while iron core or steel binding wires secure the optical cable to the messenger, ensuring mechanical stability, proper tension, and long-term reliability. Selection depends on environmental conditions, cable type, and installation standards, with stainless steel and galvanized options offering superior durability.