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How to branch cable trays arranged side-by-side in a slotted box-type cable tray

To branch side-by-side slotted box-type cable trays, use appropriate fittings, maintain cable separation, and ensure proper support and grounding.Planning and Layout

Before creating branches, carefully plan the route of the main and branch trays. Identify where the branch will diverge and ensure there is enough clearance for installation and future maintenance. Mark the positions for the branch connection and verify alignment with the main trays to avoid misalignment or sagging .

Using Fittings for Branching

For slotted box-type trays, T-shaped or Y-shaped fittings are commonly used to create branches. These fittings provide a smooth transition for cables, preventing sharp bends that could damage insulation. Ensure the fitting is compatible with the tray width and material, and that it maintains the structural integrity of the tray .

Cable Separation and Organization
  • Segregate cables by type (power, data, control) using dividers or spacing within the tray to prevent interference .
  • Maintain a fill ratio of 40–50% for power cables to allow airflow and heat dissipation .
  • Use cable ties or clamps to secure cables along the branch, keeping them neat and preventing sagging .
Support and Mounting
  • Install support brackets for the branch at intervals similar to the main tray (typically 1.5–3 meters) to prevent bending or sagging .
  • Ensure the branch tray is level and aligned with the main trays to allow smooth cable routing .
Grounding and Bonding
  • Connect the branch tray to the main grounding system using bonding jumpers to maintain electrical continuity .
  • Verify that all fittings and joints are properly bonded to prevent electrical hazards.
Labeling and Documentation
  • Clearly label all cables entering and leaving the branch for easy identification .
  • Update as-built drawings to reflect the branch layout for future maintenance or expansion. By following these steps—planning, using proper fittings, maintaining separation, supporting the trays, and grounding—you can safely and efficiently branch side-by-side slotted box-type cable trays while ensuring long-term reliability and compliance with electrical standards.
How to branch cable trays arranged side-by-side in a slotted box-type cable tray

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