Panduit FREC4X4LYL FiberRunner 4x4 End Cap
The Panduit FREC4X4LYL end cap is an engineered termination component for FiberRunner 4x4 fiber optic cable management systems in mission-critical data centers and central telecommunications facilities. This yellow polycarbonate/ABS fitting closes open channel ends and junction points to maintain continuous physical protection for high-performance copper and fiber optic cabling throughout the pathway, preventing cable exposure at terminal points where damage risk is highest. UL-listed to 2024A for optical cable guide assemblies and qualified to Telcordia GR-63-CORE Network Equipment Building Systems (NEBS) Level 3 criteria, this component meets the structural and environmental standards required for carrier-grade telecom installations and enterprise Tier III/IV data center deployments.
Key Features
- FiberRunner 4x4 system-matched end cap creates enclosed pathways that protect cable bend radius and jacket integrity at termination points
- Polycarbonate/ABS construction resists impact and maintains dimensional stability across -40°C to +65°C operating range typical in telecom environments
- UL 2024A optical cable guide assembly certification and Telcordia GR-63-CORE NEBS Level 3 compliance for carrier central office and data center applications
- Yellow high-visibility color aids fiber pathway identification in mixed-infrastructure environments and supports TIA-598-C color-coding schemes
- 5.36" x 4.63" x 0.75" profile fits standard 4x4 FiberRunner channels and fittings without adapter hardware
In high-density fiber deployments, every pathway termination point represents a potential failure mode if cables exit unprotected enclosures and experience uncontrolled bending, snagging on adjacent equipment, or physical contact with sharp rack edges. The FREC4X4LYL end cap addresses this exposure by converting open FiberRunner channels into fully enclosed structures at endpoints, equipment transitions, and temporary build-out boundaries. The polycarbonate/ABS blend material system provides impact resistance superior to standard PVC knock-out plates while maintaining the flame rating and low-smoke properties required under NFPA 70 Article 770 and IBC Chapter 8 plenum installation codes. This material combination also delivers long-term UV stability for exposed installations in equipment rooms with window exposure or outdoor telecom hut applications.
The component's UL 2024A listing validates structural integrity under cable load conditions defined in ANSI/TIA-568 standards for commercial building telecommunications cabling, while Telcordia GR-63-CORE qualification confirms performance through the seismic zone 4 earthquake simulation, thermal cycling, and airborne contaminant exposure tests required for NEBS Level 3 central office equipment. This dual certification makes the FREC4X4LYL suitable for installations ranging from enterprise data centers under TIA-942 Rated-3/4 topology to service provider equipment rooms governed by Telcordia's more stringent environmental and safety criteria. The yellow finish integrates with common fiber pathway color schemes — particularly useful when differentiating single-mode trunk routes from multimode horizontal distribution or when marking pathways carrying protected traffic under SONET/SDH or optical transport network (OTN) architectures.
Dimensional compatibility with Panduit's 4x4 FiberRunner system means the end cap installs without cutting, drilling, or fastener hardware — critical when working in energized equipment spaces where metallic debris creates short-circuit hazards or when maintaining clean-room particulate controls in semiconductor fab telecom distribution areas. The 5.36" width matches standard 4x4 horizontal tee, elbow, and vertical drop fittings, while the 4.63" height accommodates fully-loaded channels carrying 144-fiber trunk cables with separation maintained per TIA-568.3-D minimum bend radius specifications (10× cable OD for single-mode, 15× for OM3/OM4 under tension). For integrators managing campus fiber backbones between building equipment rooms or inter-floor riser pathways in high-rise structures, this end cap prevents the cable spillover and cross-bundle interference that degrades insertion loss margins and complicates future adds/moves/changes in mature installations.
