How to install optical fiber cable steel wire

Attach the optical fiber cable steel wire by lashing it to a messenger strand using stainless steel lashing wire, ensuring proper tension, corrosion protection, and avoiding stress on the fiber itself.

Materials and Tools

• Messenger Strand: Typically a carbon steel strand with zinc or zinc-aluminum coating for corrosion resistance, specified by diameter and strength for the cable load .
• Lashing Wire: Stainless steel wire (0.038"–0.045") with high ductility, commonly grades 430, 302, or 316 depending on environmental conditions .
• Tools: Lashing machine or hand tools for wrapping, tensioning devices, cable clamps, and protective gloves.

Step-by-Step Attachment Process

1. Prepare the Messenger Strand: Install the steel messenger along the intended route, ensuring it is properly tensioned and anchored at both ends .
2. Position the Fiber Cable: Place the optical fiber cable along the messenger strand. Ensure the cable is supported and not twisted or bent beyond its minimum bend radius .
3. Lash the Cable: Using stainless steel lashing wire, wrap the wire around the messenger strand and the cable in a helical pattern. Maintain consistent spacing (commonly 5% of the cable length for bundles up to 1.5 inches in diameter) to evenly distribute load .
4. Tension Control: Do not exceed the maximum pulling or tensile load of the fiber cable. Use a tension-controlled lashing machine or carefully monitor hand lashing to prevent overstressing the cable's strength members .
5. Corrosion Protection: Select lashing wire and messenger coatings appropriate for the environment. For coastal or highly corrosive areas, use zinc-aluminum coatings or 316 stainless steel for maximum durability .
6. Secure Ends: Anchor the ends of the lashing wire with clamps or crimps to prevent unraveling. Ensure the cable is not pinched or compressed, which could damage the fiber inside .
7. Inspection: After lashing, inspect the cable for twists, sharp bends, or uneven tension. Correct any issues before finalizing the installation .

Best Practices

• Never pull directly on the fiber; always use the cable's strength members .
• Avoid sharp bends, edges, or obstacles along the route .
• Use figure-8 loops when handling excess cable to prevent twisting .
• Document the installation, including tension, lashing spacing, and environmental considerations . By following these steps, the optical fiber cable will be securely attached to the steel messenger, ensuring mechanical support, long-term durability, and minimal risk of fiber damage.