How to install and construct a mesh cable tray

Installing a mesh cable tray involves careful planning, secure support installation, proper tray assembly, grounding, and organized cable routing for safety and efficiency. 1.

Planning and Preparation

Before installation, plan the cable tray route using CAD drawings or BIM models to mark horizontal bends, vertical risers, tees, and reducers. Calculate the total cable load and select tray width, depth, and support spacing according to manufacturer specifications, typically with a safety factor of 1. 5 times the actual load.

Gather tools and materials including hydraulic or electric bolt cutters, laser level, tape measure, plumb line, torque wrench, brackets, clamps, and grounding jumpers. 2.

Installing the Support System

The support system is critical for stability. Standard support spans range from 1. 5 to 2.

5 meters (5–8 feet). Supports can be wall-mounted, ceiling-mounted, or floor-mounted depending on the installation site. Use appropriate fasteners such as M6 screws and nuts for wall supports, ensuring precise horizontal and vertical alignment.

Pre-sort all accessories for quick access during assembly. 3.

Assembling the Mesh Tray

Mesh trays are lightweight and flexible, allowing top or side cable entry. Connect tray sections using quick couplers or dedicated connectors. For bends, tees, or reducers, the mesh can be cut and shaped on-site, eliminating the need for pre-fabricated bends.

Ensure all connections are tight using a torque wrench to prevent loosening. 4.

Grounding and Bonding

Mesh trays must be bonded to the facility's main grounding busbar. Use grounding clips or jumpers to connect each tray section. This ensures compliance with electrical codes and provides a safe path for fault currents.

5.

Cable Routing and Securing

Lay cables directly into the tray, avoiding strenuous pulling. Use nylon ties or Velcro straps to secure bundles at intervals of 1–1. 5 meters, reinforcing at bends and exit points.

If high-voltage and low-voltage cables share a tray, maintain minimum separation distances or use dividers to prevent electromagnetic interference. 6.

Final Checks

Verify that all tray sections are level, securely fastened, and properly grounded. Ensure cable exits are protected with edge guards to prevent damage. Conduct a final inspection to confirm compliance with local electrical codes and manufacturer guidelines.

By following these steps, a mesh cable tray installation can be completed efficiently, safely, and with flexibility for future cable additions or modifications.