Steps for twisting optical cable splice closures

Twisting optical cable splice closures involves careful cable preparation, sealing, grounding, and securing to ensure a reliable fiber connection.

1. Fiber Preparation

• Remove the Cable Jacket: Strip the outer jacket of the optical cable, including any shielding or armor, to expose the loose tubes. Leave approximately 3 meters of cable for handling and preparation .
• Clean and Abrade: Clean the loose tubes and strength member sheath using a suitable cleaning solution. Remove excess filling and abrade the outer jacket for about 150 mm to ensure proper adhesion of sealing materials .

2. Cable Installation in the Splice Closure

• Select and Attach Sealing Rings: Choose sealing rings that match the cable diameter and place them on the cable.
• Insert the Cable: Position the prepared cable into the designated entry port of the closure.
• Grounding: Connect and ground the cable's shield layer if present to prevent electrical interference .
• Seal with Tape: Wrap self-adhesive sealing tape between the sealing rings to create a tight seal and align with the outer diameter of the rings .
• Secure the Cable: Insert the sealed cable end into the closure and fasten it using a hose clamp or similar securing mechanism to ensure stability .

3. Fiber Splicing and Management

• Organize Fibers: Coil the loose fibers neatly inside the closure, maintaining proper bend radius to prevent signal loss .
• Perform Splicing: Use fusion splicing for permanent connections or mechanical splicing for temporary setups. Fusion splicing melts fiber ends together, minimizing insertion loss (typically ≤0.1 dB) and ensuring durability .
• Protect Splices: Place spliced fibers into protective splice trays or sleeves to prevent movement and damage.

4. Closure Finalization

• Close and Seal the Dome: Once all fibers are spliced and organized, close the dome or inline closure and ensure all seals are tight to prevent moisture ingress .
• Check Integrity: Verify that the closure is secure, fibers are properly managed, and there is no undue stress on the cables. Following these steps ensures a reliable, low-loss fiber optic connection and protects the network from environmental damage, mechanical stress, and signal degradation. Proper fiber management inside the closure also facilitates future maintenance, moves, adds, or changes.