Installation of Fireproof Cable Trays for Low Voltage Cables in North Asia

Fireproof cable trays for low-voltage cables should be installed using fire-resistant materials, proper sealing, and adherence to layout, spacing, and maintenance standards to ensure safety and compliance.Material Selection and Tray Types

For low-voltage cable installations, indoor trays are typically made of painted steel or galvanized steel, while outdoor or high-humidity environments require hot-dip galvanized steel, stainless steel, aluminum alloy, or fiberglass-reinforced plastic trays to resist corrosion and maintain fire resistance . Fireproof trays may include flame-retardant coatings or fire-resistant composites, and surfaces should be treated with fire-retardant paint to slow flame spread .

Layout and Routing Principles

• Shortest and straightest paths reduce cable loss and simplify maintenance .
• Segregation of power and signal cables is essential to minimize electromagnetic interference, using dedicated trays for each type .
• Horizontal deviation should not exceed 2 mm per meter, and vertical deviation should not exceed 3 mm per meter, ensuring trays are level, plumb, and securely mounted .

Fireproofing Measures

• Fire barriers should be installed within trays to isolate different fire zones .
• Wall and floor penetrations must be sealed with fire-rated materials, such as firestop boards, mineral wool, or firestop mastic, ensuring no gaps or cracks .
• Reserved openings should be sized appropriately, typically 100 mm larger than the tray dimensions, to allow effective sealing .
• Protective steel plates (minimum 4 mm thick) should be coated with anti-rust and fireproof paint and securely fixed to prevent fire hazards .
• Fireproof mortar should be applied uniformly to fill gaps between cables, trays, and fire barriers, creating a compact and continuous fire-resistant seal .

Heat Dissipation and Ventilation

• Use perforated or wire mesh trays to improve airflow and prevent heat accumulation .
• Maintain adequate spacing between cables to reduce thermal load and avoid insulation damage .

Inspection and Maintenance

• Ensure tray connections are firm, straight, and properly aligned .
• Confirm grounding continuity and check for mechanical damage or corrosion.
• Perform routine cleaning and fire resistance checks to maintain long-term effectiveness .
• Any detected abnormalities, such as deformation or coating damage, should prompt immediate inspection and suspension of use until resolved .

Fire-Resistant Products

Products like FLAMMOTECT-A coatings and DG-CR 0.7 fire protection tapes provide additional protection, forming a reliable shield around cables and enhancing resistance to environmental factors such as UV, moisture, and chemicals . These solutions are suitable for industrial, commercial, and sensitive facilities, ensuring cables remain functional during fire events.

Key Considerations for North Asia

• Consider regional climate conditions, such as high humidity or corrosive environments, when selecting tray materials .
• Ensure compliance with local fire safety regulations and international standards (IEC 60331, IEC 60332, EN 50200) for flame-retardant and fire-resistant cables .
• Plan for vertical shafts and multi-story installations, using water stop platforms and layered fire-blocking materials to prevent fire and smoke propagation . By following these guidelines, low-voltage cable trays can be installed safely, maintaining both fire resistance and operational reliability in North Asian industrial and commercial environments.