How to lay cable trays in a workshop

Laying cable trays in a workshop requires careful planning, proper tray selection, secure mounting, and organized cable placement to ensure safety, efficiency, and compliance.

Planning the Route

Before installing any trays, plan the cable tray route based on your workshop layout. Consider clearance, obstacles, and separation from other equipment. Use approved shop drawings to determine tray lengths, bends, and junctions, and mark the path on walls or ceilings using a laser level for straight alignment.

Selecting the Right Tray

Choose a tray type that suits your environment and cable load: Ladder trays: Ideal for heavy cables and good ventilation. Perforated trays: Suitable for lighter loads. Solid-bottom trays: Protect cables from dust or debris.

Ensure the tray width and depth match the number and type of cables, keeping cable fill below 40% to prevent overheating.

Mounting the Trays

Secure trays using appropriate brackets and supports: Wall mounts: Use cantilever arms. Ceiling mounts: Use trapeze hangers. Support spacing: Typically 1.

5 to 3 meters depending on tray type and load. Use proper fasteners for the building material (metal anchors for concrete, steel-grade clamps for steel structures). Connect trays with splice plates and ensure they are level and straight before tightening.

Laying the Cables

Lay cables in an organized manner, grouping by function or voltage. Avoid excessive bending and sharp edges to prevent insulation damage. Secure cables at regular intervals using clips or ties.

Maintain proper spacing and identification markers for easy maintenance. Ensure grounding and bonding connections are in place to prevent electrical hazards.

Final Checks

Inspect all fixings, brackets, and fasteners for tightness. Verify cables are neatly arranged, not overfilled, and free from tangles. Confirm compliance with relevant standards (e.g., BS EN 61537) for safety and durability.

Following these steps ensures a safe, organized, and efficient cable tray system in your workshop, facilitating future maintenance and reducing the risk of electrical hazards.