Installation of ordinary fireproof cable trays

Fireproof cable trays can be installed safely by selecting the right tray type, planning the route, using proper mounting brackets, and applying fire-resistant coatings or partitions.

1. Planning and Layout

• Route Planning: Align cable trays with the building structure, avoiding unnecessary detours or overlaps with other pipelines. Keep routes as short and straight as possible to reduce cable loss and simplify maintenance ( ).
• Segregation: Separate power (high-voltage) and signal (low-voltage) cables using dedicated trays to minimize electromagnetic interference ( ).
• Load Considerations: Ensure the tray width and thickness match the number and weight of cables, and that mechanical strength prevents deformation under full load ( ).

2. Selecting Tray Type and Materials

• Indoor Use: Painted steel or galvanized trays.
• Outdoor Use: Hot-dip galvanized or stainless steel trays.
• Corrosive or High-Humidity Areas: Aluminum alloy or fiberglass-reinforced plastic trays ( ).
• Fire-Resistant Systems: Consider E90-rated trays like the Fast Klick system for wall or ceiling mounting ( ).

3. Mounting Methods

• Wall-Mounted Installation:
  1. Insert wall anchors into a concrete wall.
  2. Secure NKP-SNT wall brackets with flange nuts.
  3. Place the fireproof cable trays onto the brackets using the insert, click, and lock mechanism ( ).
• Ceiling-Mounted Installation:
  1. Use NKP-PL profiles, threaded rods, and anchor bolts.
  2. Attach profiles securely and install trays with the click-and-lock system.
  3. Maintain load-bearing elements spaced ≤1.2 meters and a minimum 25 cm clearance from the ceiling ( ).
• Fireproof Partitions: Install partitions above the tray to prevent fire spread. Ensure the surface is clean and smooth, and select partition size and thickness based on tray dimensions and cable quantity ( ).

4. Fire Protection Measures

• Coatings and Tapes: Apply fire-resistant coatings like FLAMMOTECT-A or fire protection tapes such as DG-CR 0.7 to enhance resistance to flames, UV, moisture, and chemicals ( ).
• Firestop Systems: Use UL-listed firestop pillows, putty, or caulks to seal openings where trays pass through walls or floors. Ensure proper sizing and follow manufacturer instructions for complete encapsulation ( ).

5. Safety Checks and Compliance

• Verify that all trays are securely mounted and partitions are tight.
• Ensure the cable load does not exceed the tray's rated capacity (e.g., ≤10 kg/m for Fast Klick E90 trays) ( ).
• Follow local fire safety codes and standards throughout installation.
• Conduct a final inspection to confirm that fireproofing measures are effective and that the installation meets safety requirements ( ).

By following these steps, you can ensure a robust, fire-resistant cable tray installation that maintains electrical safety, system reliability, and compliance with fire protection standards.