How to construct and install Palestinian cable trays

The installation of cable trays in Palestine involves careful planning, material inspection, support setup, tray placement, cable laying, and adherence to safety and engineering standards.

Material Inspection and Preparation

Before installation, all cable trays, ladders, and accessories must be inspected for physical damage, corrosion, or coating defects. Materials should be stored horizontally on flat surfaces with timber supports to prevent moisture damage and direct sunlight exposure. Approved shop drawings and material submittals must be reviewed, and any discrepancies reported to the supervisor or engineer for corrective action.

Support Installation

Cable tray supports are installed at the required elevation from the floor, ensuring a level line using a laser or leveling tool. The distance between supports (span) is determined based on the tray load and manufacturer recommendations. Supports must be checked for structural integrity, and all fixings and hardware should comply with project specifications.

Tray Placement

Trays are typically installed flat in buildings or under walkways. Vertical or edgewise installation is only used in special cases. Trays should be self-supporting with appropriate flange widths (48mm, 72mm, or 100mm) depending on cable cross-section.

Each tray section is aligned and connected securely to the supports, ensuring continuity and stability.

Cable Laying and Fastening

Cables are laid in groups on horizontal trays, with fastening every 2–3 meters using stainless steel strips. For vertical or edgewise trays, cables are fixed with two strips per meter. Proper separation of power, control, and data cables is maintained to prevent interference and facilitate maintenance.

Safety and Compliance

All installation work must be supervised by a competent electrical engineer. The work area should be clean, free of obstructions, and barricaded where necessary. Toolboxes talks and safety briefings are conducted before starting.

Installation must comply with international standards such as NEMA VE1, VE2, and ARAMCO, as well as local electrical safety codes.

Final Inspection

After installation, trays and supports are inspected for alignment, secure fastening, and compliance with approved drawings. Any damaged or non-compliant materials are replaced. Documentation, including Material Inspection Requests (MIRs) and Inspection & Test Plans (ITPs), should be completed and approved before energizing the system.

This structured approach ensures safe, durable, and maintainable cable tray installations suitable for commercial, industrial, and telecommunication projects in Palestine.