Trunk optical cables should be installed carefully in trunking systems, following proper handling, routing, and securing procedures to prevent damage and ensure optimal performance.

Planning and Preparation

Before installation, conduct a route survey to identify the path for the trunk cable, including wall, ceiling, or floor trunking, and verify conduit or duct suitability ( ). Ensure all necessary approvals, shop drawings, and project specifications are available ( ). Prepare the work area by cleaning manholes, marking cable loops, and ensuring proper signage and safety measures ( ).

Handling and Offloading

• Keep the protective covering on the cable reel until installation begins ( ).
• Store reels vertically on their flanges and chock them to prevent rolling ( ).
• Use lifting slings at a 45° angle for drum handling; avoid manual lifting ( ).
• Ensure the storage base is smooth and horizontal to prevent cable deformation ( ).

Trunking Installation

• Drill mounting holes in the trunking bottom according to the system specifications (e.g., ø 7.5 mm for wall brackets) ( ).
• Use appropriate screws (approx. 6 mm) without sharp edges to avoid damaging cables ( ).
• Lift the trunking onto wall brackets and press until it locks in place ( ).
• Adjust the distance between the trunking and wall using adjustment pieces if needed to compensate for uneven surfaces ( ).
• Install ventilation ribs to cover gaps between the trunking and wall ( ).

Cable Pulling and Placement

• Respect the minimum bend radius of the fiber cable; avoid twisting or excessive tension ( ).
• Use cable lubricant for long duct runs or tight conduit paths ( ).
• Pull cables slowly, monitoring tension to prevent crushing or stretching ( ).
• Leave cable reserves in loops or figure-eight shapes for future maintenance ( ).

Splicing and Connections

• Use splice protectors and leave sufficient fiber reserves ( ).
• Perform connections with pigtails or direct connector mounting where possible ( ).
• Ensure all unused fibers are properly secured and not stressed ( ).

Testing and Verification

• Conduct OTDR and OLTS testing to verify signal integrity and loss ( ).
• Inspect endfaces with IEC 61300-3-35-compliant scopes to ensure cleanliness ( ).
• Confirm that the installation meets TIA-568, ISO/IEC 11801, and ITU-T standards ( ).

Safety Considerations

• Follow OSHA, NESC, and local safety regulations ( ).
• Avoid standing under tensioned cables or near moving reels ( ).
• Use barricades, warning signs, and proper scaffolding when working above floor level ( ).
• Never look directly into fiber ends carrying laser light ( ). By following these steps, trunk optical cables can be installed safely and efficiently, ensuring long-term performance and compliance with industry standards.