Cable trays are support systems used to securely hold and organise electrical cables in buildings and industrial facilities. They provide a safe pathway for cables, protecting them from damage while allowing easy access for installation, maintenance and future upgrades. Commonly found in commercial and industrial settings, cable trays help manage large volumes of wiring efficiently, ensuring safety and reducing clutter.
Risks
Due to their specific function, cable trays present several fire risks. These include:
- Overheating Cables
- Bundled or overloaded cables can generate excessive heat, increasing fire risk.
- Electrical Faults
- Damaged or faulty cables may cause short circuits or sparks inside trays.
- Accumulated Dust and Debris
- Dust buildup in trays can act as fuel, spreading fire rapidly.
- Poor Installation
- Inadequate spacing or support can lead to cable damage and increased fire hazards.
- Lack of Fire Detection
- Insufficient early detection allows fires to grow unnoticed within the cable tray.
Challenges
When it comes to designing a reliable fire detection solution for cable trays there are a number of factors to consider:
- Detecting Heat Early in Confined Spaces
- Cable trays are often enclosed or cramped, making early heat detection difficult.
- Resisting Environmental Factors
- Detectors must withstand dust, moisture and vibrations common around cable trays.
- Avoiding False Alarms
- Electrical interference and heat fluctuations require systems that minimise false alerts.
- Integrating with Existing Infrastructure
- Fire detection needs to work seamlessly with current cable management and building systems.
- Ensuring Easy Maintenance
- Systems must allow access for inspection and upkeep without disrupting operations or cables.
FyreLine Resettable
The FyreLine Resettable Linear Heat Detection system is a cutting-edge fire detection solution designed specifically for monitoring cable trays and other critical infrastructure. Unlike traditional heat detection cables that require replacement after activation, this system features a resettable heat-sensitive cable, significantly reducing maintenance time and costs. It continuously monitors temperature changes along its length, providing early warning of overheating or potential fire risks.
Key features include adaptive threshold adjustment, which compensates for ambient temperature variations to minimise false alarms, and configurable pre-alarm and full alarm settings for timely alerts.
The system also integrates easily with Building Management Systems via Modbus, allowing centralised monitoring and control. Certified to EN54-22 standards, the FyreLine Resettable system offers reliable and efficient fire detection, making it an ideal choice for protecting cable trays in industrial, commercial, and critical infrastructure environments.
Approvals
The FyreLine Resettable Linear Heat Detection (LHD) system is certified to meet rigorous international fire safety standards. It holds EN54-22:2015+A1:2020 approval by VdS, confirming its performance as a resettable line-type heat detector in automatic fire detection systems.
Additionally, the system is UL 521 listed, ensuring compliance with stringent safety requirements for fire protective signaling systems. These certifications underscore FyreLine’s reliability and suitability for diverse applications, providing confidence in its effectiveness for fire detection and protection.
Design Considerations
Controller Placement
The FyreLine Resettable controller should be installed in a clean, dry and accessible location near the cable tray. Ideally, it should be placed within a secure control room or equipment cabinet, allowing easy monitoring and maintenance while protecting it from dust, moisture and physical damage.
Cable Placement
FyreLine Resettable offers various cable types tailored to different temperature ranges and environments, ensuring accurate heat detection along cable trays. These cables should be installed neatly and securely within the tray, avoiding tight bends or overlaps that could affect sensitivity. Proper spacing and fixation prevent damage and ensure consistent monitoring along the entire length.
Mounting Clips
P-Clips provide a secure and cushioned mounting point for FyreLine Resettable LHD cables. They are best placed at regular intervals—usually every metre—along the cable route, especially in areas with vibration or movement. Their flexible grip helps prevent cable damage while maintaining firm support.
J-Clips are used to securely fix FyreLine Resettable LHD cables in place. They should be installed at regular intervals—typically every metre—along the cable route to maintain proper positioning and tension. Placement should ensure the cable remains close to the cable tray, avoiding contact with sharp edges.
EOL Placement
The FyreLine Resettable End-of-Line (EOL) module completes the detection circuit by monitoring the entire length of the heat detection cable. It ensures system integrity by detecting faults or breaks in the cable.
For optimal results, the EOL module should be installed securely at the far end of the cable tray run, in a clean, accessible location protected from environmental damage.
Typical Wiring Diagram
For addressable integration, the FyreLine Resettable controller connects via an addressable interface module to the main fire alarm loop. This module transmits the FyreLine’s alarm or fault signals, allowing the main panel to precisely pinpoint the heat event’s location.
When integrated conventionally, the FyreLine Resettable controller’s alarm and fault relays are directly wired into a conventional fire alarm control panel’s zone inputs. Upon detecting a heat event or cable fault, the FyreLine controller activates its corresponding relay, signalling a general alarm or fault for that specific zone on the conventional panel.
Why Choose Eurofyre?
- Complete System Supplier
- Eurofyre manufactures and supplies all aspects of fire detection including linear heat detection and its associated products and can provide expert advice and consultation.
- Demonstration and Training
- We offer demonstrations and expert training on a range of systems, including FyreLine Resettable linear heat detection systems, in our very own sophisticated training facility.
- After-Sales Support
- Eurofyre offers both on-site and telephone support to assist you in ensuring that your system is fully functional and operating at maximum efficiency. Our after-sales care and support are second to none.
For more information about FyreLine Resettable Linear Heat Detection, or to discuss any of the other products that Eurofyre has to offer, please feel free to get in touch either by phone on +44 (0) 1329 835 024, by email to sales@eurofyre.co.uk or via the online enquiry form situated on our contact page.
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