Installation of cable trays on the ground in Gabon

Cable tray installation in Gabon follows a structured process involving planning, material verification, support installation, cable laying, grounding, and inspection to ensure safety and compliance.

Planning and Preparation

Before installation, review the approved shop drawings to determine tray layout, length, and location within the building or facility . Conduct a site inspection to ensure the workspace is safe, accessible, and free from obstructions . Confirm that all required tools, lifting equipment, and manpower are available, and conduct a safety briefing for the installation team .

Material Handling and Inspection

All cable trays, ladders, and accessories must be inspected upon delivery for damage, coating integrity, and compliance with approved material submittals . Damaged or non-conforming materials should be reported and removed from the site. Store trays horizontally on a flat surface with timber supports at intervals of one meter, protecting them from moisture and sunlight .

Support and Mounting

Install supports, brackets, and hangers according to manufacturer recommendations and project specifications . Support spacing typically ranges from 1.5 to 3 meters for horizontal runs, with additional support at elbows, tees, and expansion joints . Ensure that connectors are positioned between support points, not at the center of spans, and allow for longitudinal movement to accommodate thermal expansion .

Cable Tray Installation

• Route marking: Mark the tray route based on the approved design, considering clearance, load capacity, and cable separation .
• Tray placement: Secure trays to supports using appropriate clamps and fasteners, ensuring alignment and level installation .
• Cable laying: Organize cables neatly within trays, using cable ties or straps at intervals of 1.8 meters for horizontal runs and 0.9 meters for vertical runs . Leave slack for expansion and future adjustments.
• Grounding and bonding: Bond all metal trays together with jumpers and ground at least every 15 meters and at both ends to maintain electrical continuity . Expansion joints must include bonding jumpers .

Inspection and Documentation

After installation, perform a walkthrough inspection to check for misalignment, loose clamps, overfilled sections, or unsupported spans . Verify that all trays, supports, and accessories conform to approved designs and specifications . Maintain updated documentation, including wiring maps, labels, and inspection reports, for future maintenance and audits .

Safety Considerations

• Barricade work areas and follow HSE safety procedures .
• Avoid using cable trays to support rigging for cable installation .
• Ensure proper lighting and safe access to all installation areas .
• Conduct toolboxes talks and safety briefings before starting work . By following these steps, cable tray systems in Gabon can be installed safely, efficiently, and in compliance with international standards, ensuring reliable electrical distribution and ease of maintenance.