Panduit PWB4X4WH 4" x 4" Steel Wire Basket Tray
The Panduit PWB4X4WH is a 4" x 4" powder-coated steel wire basket designed for high-density cable routing in data centers, connected buildings, and industrial automation environments. UL-classified as an equipment grounding conductor per NEC Sections 392.3(C) and 392.7(B), this tray eliminates the need for separate grounding conductors in compliant installations, reducing material costs and simplifying inspections. The white powder-coated finish resists corrosion in temperature-controlled spaces while maintaining a clean appearance over time. Each carton ships with two sections for efficient staging across multi-rack deployments.
Key Features
- 4" x 4" cross-section optimized for medium-density fiber and Cat6A bundles
- UL-classified equipment grounding conductor eliminates separate bonding wire requirements
- Powder-coated steel construction withstands decades of cable adds/moves/changes without surface degradation
- White finish integrates with raised-floor data center aesthetics and visible overhead runs
- NEC 392.3(C) and 392.7(B) compliance streamlines AHJ inspections for grounding continuity
- Compatible with Panduit's full ecosystem of wire basket fittings, supports, and junction accessories
Wire basket trays solve the thermal management problem inherent in solid-bottom or ventilated trough systems — unrestricted airflow around every cable prevents hotspot formation even when fill ratios approach NEC maximums. The 4" x 4" profile balances capacity with mounting flexibility: wide enough for diverse cable types (copper, fiber, A/V, low-voltage control) yet compact enough to route through congested plenum spaces or under raised floors without consuming excessive vertical clearance. The open-grid design also provides immediate visual confirmation of cable organization during moves and troubleshooting, eliminating the need to lift covers or remove fasteners. Installers commonly deploy this size for horizontal distribution between racks in row-based cooling layouts, where larger 6" or 12" widths would obstruct airflow or interfere with containment curtains.
The UL equipment grounding conductor classification is critical for jurisdictions enforcing strict NEC interpretations: the steel basket itself serves as the fault-current return path, provided all joints and supports maintain electrical continuity per 392.7(B). Panduit's powder-coat process preserves metal-to-metal contact at connection points through controlled film thickness and post-cure inspection, ensuring the installed system meets the 1-ohm maximum resistance requirement without field modification. Installers should verify that junction plates, splice kits, and wall/ceiling supports are also UL-listed for grounding use — mixing non-compliant components voids the classification. The white finish specifically addresses data centers and telecom facilities where overhead tray runs remain visible to operations staff; the high-reflectance coating improves lighting efficiency and simplifies cable tracing compared to galvanized or black finishes.
This tray integrates directly into Panduit's wire basket system using the manufacturer's standard splice plates, vertical elbows, tees, and trapeze hangers. The 4" width accepts all Panduit horizontal and vertical fittings without adapter brackets, and the consistent 4" height maintains uniform cable bend radius across direction changes. Competitors list CF105/100WH, FT4X4X10-WH, and WBT4X4WH as equivalents, but verify UL grounding certification and powder-coat adhesion specs before substituting — not all "wire basket" products meet NEC grounding requirements, and field failures of non-compliant coatings create rust staining and particulate contamination in clean environments. Each carton contains two sections; confirm linear footage requirements and order in multiples of two to minimize partial-carton waste on job sites.
