Cable tray installation ladder

Proper installation of cable tray ladders ensures safe, organized, and durable support for electrical cables while complying with industry standards.

Planning and Preparation

Before installation, review the approved shop drawings to determine the layout, length, and location of cable trays and ladders in the building. Ensure all materials, including trays, ladders, fittings, and accessories, are inspected for damage and match the approved specifications. Store trays horizontally on a flat surface with timber supports at intervals of about one meter, protecting them from moisture and sunlight.

Selecting the System

Choose a cable ladder or tray system that meets the load requirements of all cables, including future expansions. Systems should comply with standards such as BS EN 61537 for trays and ladders or the Canadian Electrical Code (CEC) for installation. Consider the type of tray (ladder, solid-bottom, ventilated) and accessories like bends, tees, reducers, covers, and splice plates.

Supports and Mounting

Install supports according to manufacturer recommendations and engineering standards. Common support types include trapeze hangers, center-span supports, and wall brackets. Maximum support spacing typically ranges from 3 to 3.

6 meters, with load capacities per hanger around 318–340 kg (700–750 lbs),. Center-hung supports allow easier cable installation from both sides. Ensure all supports are securely anchored to the building structure.

Installation Procedure

Assemble the tray sections using splice plates, connectors, and hold-down clamps, ensuring proper torque for mechanical and electrical continuity. Maintain bend radius when routing cables to prevent insulation damage. Implement cable management using ties, cleats, or straps to separate cables by type and prevent stress on terminations.

Ground the system continuously to provide electrical safety and fault protection. Consider expansion joints in areas with temperature fluctuations to prevent stress and deformation.

Safety Considerations

Cable ladders are not designed to support people; they are intended solely for cable support. Installation should be performed by qualified personnel familiar with electrical systems, safety procedures, and local codes. Follow all occupational health and safety regulations to prevent personal injury and property damage.

Maintenance

Regularly inspect the system for loose connections, corrosion, or damage. Ensure that any modifications or additions follow the original design and manufacturer guidelines to maintain system integrity. By following these steps, cable tray ladder installations will be safe, reliable, and compliant with industry standards, providing organized support for electrical and communication cables.