Fireproof cable trays for low-voltage cables

Fireproof cable trays for low-voltage applications are designed to maintain cable integrity during fire, using materials like steel, stainless steel, aluminum, or fiber-reinforced plastics, often combined with fire-resistant coatings or tested systems such as Cablofil.

Material Selection

Choosing the right material is crucial for fire-resistant cable trays. Common options include: Steel: Strong and durable, suitable for heavy cable loads. Hot-dip galvanized steel offers corrosion protection but limited fire resistance, as zinc melts at lower temperatures.

Stainless Steel: Provides superior corrosion resistance and mechanical strength, though not inherently fireproof. Aluminum: Lightweight and corrosion-resistant, but may deform under high heat.

Fiber-

Reinforced Plastics (FRP): Non-conductive and resistant to corrosion, with good fire performance in certain formulations.

Fire-

Resistant Systems

For low-voltage applications, specialized fireproof cable trays are available: Cablofil Fireproof Cable Trays: Designed for both low and high-voltage cables, these trays meet stringent fire safety requirements, tested under the German DIN 4102-12 standard at temperatures up to 1000°C for 30, 60, and 90 minutes. Fire Protection Coatings: Products like FLAMMOTECT-A and DG-CR 0. 7 form protective layers around cables, preventing flame propagation and maintaining functionality during fire.

Installation Considerations

Proper installation enhances fire safety: Segregation: Low-voltage and high-voltage cables should be routed separately to reduce interference and fire risk. Support and Alignment: Trays must be level, plumb, and securely mounted, with horizontal deviation ≤2mm/m and vertical deviation ≤3mm/m. Firestopping: Penetrations through walls or slabs should be sealed with fire-rated boards, mineral wool, or firestop packs to prevent fire spread.

Applications

Fireproof cable trays are widely used in: Industrial plants, power stations, and substationsHospitals, airports, and data centersHigh-rise buildings and offshore facilities These trays ensure that low-voltage systems, including communication and control cables, remain operational during fire emergencies, protecting both equipment and occupants.

Key Takeaways

Select materials and systems tested for fire resistance, such as Cablofil or coated trays. Ensure proper installation, support, and firestopping to maintain tray integrity. Fireproof cable trays are essential in high-risk environments to prevent fire propagation and maintain critical low-voltage operations.