Installation of fire-resistant steel cable trays in Brazil

Fire-resistant steel cable trays must be installed following strict technical standards, using appropriate materials, fireproof coatings, and proper sealing to ensure safety and compliance.

Material Selection and Tray Types

For fire-resistant installations, steel cable trays are commonly used due to their strength and durability, but the type of steel and protective coatings are critical. Stainless steel offers superior corrosion resistance, while hot-dip galvanized steel provides basic protection but may fail under high fire exposure due to zinc melting . For high-risk environments such as hospitals, data centers, or high-rise buildings, fireproof coatings or fire-resistant steel plates are recommended to enhance fire containment .

Fireproofing Measures

• Fireproof coatings and tapes: Products like FLAMMOTECT-A or DG-CR 0.7 form a protective shield around cables, preventing flame propagation and maintaining functionality during a fire .
• Fire blocking materials: Install in layers between cables and trays, ensuring dense and uniform placement to prevent fire spread .
• Fireproof mortar: Fill gaps between cables, trays, and fire blocking materials to create a smooth, continuous barrier .
• Steel plates: Use 4mm thick plates, extended beyond tray dimensions, treated with anti-rust paint and fireproof coating .

Installation Guidelines

• Route planning: Align trays with the building structure, avoid unnecessary detours, and separate power and signal cables to reduce interference .
• Tray support and fastenings: Use fire-rated fastening accessories and ensure all connections are firm, straight, and properly aligned .
• Penetrations: Seal openings through walls or floors with fire-rated materials to maintain compartmentalization .
• Heat dissipation: Use perforated or wire mesh trays and maintain adequate spacing between cables to prevent overheating .

Inspection and Maintenance

• Regular checks: Inspect for corrosion, coating integrity, and mechanical damage, especially in outdoor or high-humidity environments .
• Fire resistance verification: Schedule periodic testing of fireproof coatings and sealing effectiveness to ensure long-term protection .

Compliance and Safety

• Follow international standards such as EN 1363-1 for fire testing and installation procedures .
• Ensure installation is performed by qualified personnel familiar with electrical construction practices and local Brazilian regulations .
• Choose materials that do not emit toxic gases during a fire to protect occupants and critical equipment . By adhering to these guidelines, fire-resistant steel cable trays in Brazil can provide reliable electrical distribution, minimize fire risks, and maintain operational continuity in critical facilities.