Fire cable tray for laying network cables

Fire-resistant cable trays provide safe routing for network cables while preventing fire propagation and maintaining cable functionality under high temperatures.

Types and Standards

Fireproof cable trays are designed to contain and protect cables from fire, ensuring safety in industrial, commercial, and critical infrastructure environments. Common types include: Cablofil Fire-Resistant Cable Trays: Suitable for low and high voltage cables, tested to the DIN 4102-12 standard, which subjects the tray system to temperatures up to 1000°C for 30, 60, and 90 minutes. Ladder, Basket, and Solid Bottom Trays: Can be combined with firestop sections or coatings to enhance fire resistance.

European C

E marking and UL certifications indicate compliance with fire safety and electrical standards, ensuring reliability and legal compliance.

Materials and Construction

Indoor Use: Painted steel or galvanized steel trays. Outdoor or Corrosive Environments: Hot-dip galvanized steel, stainless steel, aluminum alloy, or fiberglass-reinforced plastic. Mechanical Strength: Tray width and thickness should support the weight of network cables without deformation.

Fire-resistant trays often incorporate intumescent coatings, fireproof tapes, or firestop pillows to prevent heat transfer and flame propagation.

Fire Protection Measures

Firestop Sections: Use UL-listed firestop pillows, moldable putty, or intumescent caulks to seal openings where trays pass through walls or floors. Fireproof Coatings: Products like FLAMMOTECT-A or DG-CR 0. 7 tape form a protective shield around cables, delaying fire spread and maintaining cable functionality.

Cable Cleats: Specialized cleats, such as Ellis Patents Phoenix, help secure cables while preserving fire resistance.

Installation Considerations

Route Planning: Keep cable paths short, straight, and coordinated with building structures. Segregate power and network cables to reduce interference. Tray Load: Ensure trays are sized for the number and weight of cables, including future expansion.

Compliance: Verify that the selected tray system meets local fire safety codes and standards, including UL, DIN, or national regulations.

Summary

For network cables, fire-resistant cable trays provide both mechanical support and fire protection. Selecting the right tray involves considering material, fire rating, installation environment, and compliance with standards. Complementary firestop products and coatings further enhance safety, ensuring that network systems remain operational even during a fire event.