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How to install a fiber optic cable splice closure

Properly fitting a fiber optic cable splice closure involves careful cable preparation, sealing, splicing, tray management, and grounding to ensure long-term network reliability.

Cable Preparation

  1. Remove the Cable Jacket: Strip the outer jacket, shielding, and armor to expose the loose tubes, leaving about 3 meters of cable for preparation .
  2. Clean and Abrade: Clean the loose tubes and strength member sheath with a suitable cleaning solution. Remove excess filling and abrade the outer jacket for approximately 150 mm to ensure proper sealing .

Installing the Cable in the Closure

  1. Select and Attach Sealing Rings: Choose sealing rings that match the cable diameter and place them on the cable .
  2. Insert the Cable: Position the cable into the designated entry hole of the closure.
  3. Grounding: Connect and ground any metallic shielding or strength members as required .
  4. Seal the Cable: Wrap self-adhesive sealing tape between the sealing rings to create a tight seal, then secure the cable to the closure base using a hose clamp or provided hardware .

Fiber Splicing and Tray Management

  1. Splice the Fibers: Use the specified fusion or mechanical splicing method.
  2. Insert Splices into Trays: Place splices into the slots of the splice tray, coiling any excess fiber neatly to maintain the minimum bend radius (typically >30 mm for loose tubes and >38 mm for individual fibers), .
  3. Stack Trays: Depending on closure capacity, stack splice trays securely, ensuring accessibility for future maintenance. Trays can be fastened together to prevent movement .

Closure Sealing

  1. Close the Tray Lid: Press the lid over the splice tray to lock it in place.
  2. Seal the Closure: Ensure all entry/exit tubes are properly fitted and sealed, using heat-shrinkable or mechanical sealing components as specified by the manufacturer .

Final Checks

  • Verify that all fibers are free from stress or pinching.
  • Confirm grounding and bonding of metallic components.
  • Ensure the closure is fully sealed against environmental factors such as moisture, dust, and mechanical stress . Following these steps ensures that the fiber optic splice closure is secure, organized, and maintains optimal optical performance over time .

How to install a fiber optic cable splice closure - TKMM Photonics Systems Sp. z o.o. [PDF]

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