Firefighting Metal Cable Tray Models and Specifications

Fire-rated metal cable trays are designed to maintain electrical system integrity during fires, with models available in galvanized steel, stainless steel, aluminum, and fiberglass, offering various load capacities, fire resistance ratings, and compliance with international standards.

Materials and Construction

Firefighting cable trays are typically made from galvanized steel, stainless steel, powder-coated aluminum, or fire-resistant fiberglass. These materials are selected for their high strength-to-weight ratio, corrosion resistance, and fire endurance. Some trays feature intumescent coatings to enhance fire resistance and prevent flame propagation along cable runs (NewReach) .

Fire Resistance Ratings

Cable trays are tested and certified to withstand high temperatures for specific durations. Common fire resistance ratings include:

• E30, E60, E90 according to DIN 4102-12 (30, 60, and 90 minutes of fire resistance) .
• Compliance with ISO 834-1, EN 1363-1, DIN 4102-12, AS/NZS 3013:2005 ensures global safety standards are met .
• WS5X classification provides a 2-hour fire rating at up to 1050°C, suitable for critical infrastructure .

Dimensions and Load Capacities

Standard fire-rated cable trays are available in 3-meter lengths with laying widths around 150 mm. Load capacities vary depending on span and material:

• Example: 10 kg/m load rating on a 1.65-meter span for heavy-duty trays .
• Special designs, such as infinite pattern trays, offer greater loading capacity compared to conventional models .

Models and Types

Firefighting cable trays come in several configurations:

• Ladder-type trays: Allow easy cable entry/exit and support heavy loads.
• Ventilated trays: Provide airflow to prevent overheating.
• Solid-bottom trays: Protect sensitive cables from dust and debris.
• Fiberglass trays: Non-toxic, corrosion-resistant, and suitable for chemical environments .

Compliance and Standards

Fire-rated cable trays are designed to meet NFPA 70 (National Electrical Code), NEMA VE 1-2017, UL certifications, and CE marking for European compliance . These standards ensure safe operation during fire events, protecting emergency systems like fire alarms, lighting, and building management systems.

Additional Features

• Powder-coated finishes for corrosion and fire protection.
• Heavy-duty options for industrial or high-load applications.
• Customizable lengths and fittings to accommodate complex layouts.
• Eco-friendly, non-toxic materials to prevent harmful fumes during fires . Firefighting metal cable trays are essential for maintaining critical electrical and communication systems during emergencies, ensuring safety, compliance, and operational continuity.