Panduit PWBFESEZ Wire Basket Flat Expansion Splice

The Panduit PWBFESEZ is a flat expansion splice designed to join sections of wire basket cable tray in straight runs where thermal expansion, building settlement, or seismic movement demand controlled flex points. Electro-zinc-plated steel construction resists corrosion in telecom closets, data centers, and industrial environments while maintaining continuous grounding across tray segments. This single-piece splice eliminates the need for field-fabricated jumpers and ensures code-compliant pathway continuity in grows, adds, and moves.

Key Features

• Flat expansion joint design accommodates thermal movement and building settlement without stressing cable bundles or creating pathway gaps
• Electro-zinc finish delivers superior corrosion resistance in high-humidity telecom spaces and mixed-environment IT installations
• Steel construction maintains structural integrity under loaded cable bundles while providing continuous bonding path for fault currents
• Drop-in installation compatible with standard Panduit wire basket tray—no drilling, welding, or custom fabrication required
• Single-unit design reduces inventory complexity and field labor compared to multi-piece expansion assemblies

Wire basket tray installations in commercial buildings face two competing demands: pathways must be mechanically continuous to support cable weight and provide grounding, yet rigid end-to-end runs crack welds, buckle mounting hardware, or distort tray geometry when structures shift. The PWBFESEZ addresses this with a controlled flex point that permits linear expansion and contraction while preserving electrical bonding and load-bearing capacity. The flat profile maintains the same vertical clearance as straight tray sections, critical in ceiling plenums with tight overhead obstructions or raised-floor understructures where every half-inch counts. Electro-zinc plating extends service life in environments where galvanized coatings see premature breakdown—labs with chemical fumes, coastal facilities with salt air, or any space where condensation forms during HVAC cycling.

Integration into existing Panduit wire basket runs requires no special tools or skills: align the splice with the ends of two tray sections, fasten per the manufacturer's installation guide, and verify bonding continuity with a low-resistance ohmmeter. The steel base ensures compatibility with magnetic cable ties and ferrous-compatible J-hook accessories commonly used in structured cabling deployments. For installations subject to seismic codes—California Title 24, IBC Chapter 16, or ASCE 7 bracing schedules—expansion splices prevent tray runs from transferring shear forces into rigid support attachments, reducing the likelihood of hanger failure during ground motion. In grow scenarios where a tray run must be extended through a fire-rated wall or floor penetration, the splice serves as a convenient break point for firestop integration without cutting or modifying factory-finished tray ends.

This splice is specified by data center designers who need to bridge seismic joints between building wings, telecom contractors running long tray spans across thermal zones, and industrial integrators dealing with equipment vibration or seasonal temperature swings. The electro-zinc finish meets or exceeds ASTM B633 SC1 requirements for sacrificial coating thickness, and the steel substrate complies with NEC Article 392 grounding and bonding provisions when installed per Panduit's torque specifications. For projects that schedule value-engineering reviews, the single-piece design eliminates the labor and material waste associated with field-cut expansion loops or custom-bent tray sections, delivering code-compliant thermal relief at a fraction of the installed cost.