Installation Requirements for Optical Cable Trays

Installing optical cable trays involves planning the route, mounting supports, securing trays, and carefully routing fiber optic cables while adhering to safety and industry standards.

Planning and Preparation

Before installation, review the Bill of Quantities (BOQ) to ensure all tray components, supports, and fasteners meet the project's size and weight requirements. Determine the cable load per meter to select the correct tray thickness and support spacing, typically 1. 5 meters for short spans or 3 meters for longer spans.

Plan the tray route using a laser level to ensure straight runs and avoid sharp bends that could damage cables. Consider future expansions and calculate the maximum fill ratio, usually 50% of tray depth.

Mounting Supports

Optical cable trays can be mounted on walls or ceilings: Wall Mounts: Use cantilever arms that extend from the wall to support the tray. Ceiling Mounts: Use trapeze hangers consisting of rods and flat bars to suspend the tray. Fasteners must match the building material: metal anchors for concrete and steel-grade clamps for steel structures.

Ensure supports are level and secure before placing trays.

Installing the Trays

Assemble tray sections using splice plates or couplers, ensuring components are flush and aligned. Secure trays to supports with appropriate fasteners, keeping runs straight and avoiding sagging. Check for sharp edges or burrs inside the tray to prevent cable damage.

For vertical installations, ensure the tensile load of the suspended cable does not exceed the cable's maximum long-term rating.

Routing Fiber Optic Cables

Use U-shaped or centered input holes for fiber entry, drilling if necessary. Route cables in a clockwise direction and secure with plastic ties or straps. Avoid overfilling the tray and maintain proper bend radius to prevent signal loss.

Connect cables to devices or transceivers after securing the tray.

Safety and Standards

Follow NE

C standards and TIA-569-B guidelines for commercial pathways. Ensure all fasteners are tight and trays are adequately supported. Avoid using trays as walkways to prevent personal injury and cable damage.

By following these steps, optical cable trays can be installed safely and efficiently, providing a durable and organized pathway for fiber optic cables.