Panduit FRIV4524X4LBL FiberRunner 45° Inner Vertical Angle

The Panduit FRIV4524X4LBL is a 45-degree inner vertical angle fitting engineered for the FiberRunner 4x4 cable management system. This component creates controlled upward transitions from horizontal pathways in data center and telecommunications environments where fiber infrastructure must change elevation while maintaining proper bend radius and protection. Used in conjunction with the outer vertical connector (FROV4524X4LBL), it enables plane changes in overhead-to-vertical or horizontal-to-equipment routing scenarios. The polycarbonate/ABS construction delivers impact resistance and dimensional stability under load, while UL 2024A listing and NEBS Level 3 compliance address fire safety and seismic requirements for carrier-grade installations.

Key Features

• 45-degree inner vertical angle for FiberRunner 4x4 system — creates controlled upward bend from horizontal raceway
• Polycarbonate/ABS construction — impact-resistant material maintains shape under cable load and thermal cycling
• UL 2024A listed for fiber optic cable pathway assemblies — meets fire and safety standards for enclosed raceway systems
• NEBS Level 3 compliant per Telcordia GR-63-CORE — qualifies for central office and carrier environments with seismic and environmental requirements
• Pairs with FROV4524X4LBL outer vertical connector — two-piece system completes the 45-degree plane change
• RoHS-compliant black finish — low-visibility installation in exposed ceiling and equipment room applications
• Dimensions: 25.76" L × 10.24" W × 8.15" H (654mm × 260mm × 207mm) — fits standard FiberRunner 4x4 channel profile

This angle fitting addresses a specific problem in fiber pathway design: transitioning from horizontal overhead raceway down to vertical equipment racks or up from floor-level pathways to overhead runs. Standard 90-degree fittings create tight bends that risk exceeding minimum bend radius on high-density fiber trunks; the 45-degree geometry extends the curve over a longer path, reducing stress on OM3/OM4/OS2 cables during pulls and providing margin for future adds. The two-piece inner/outer construction locks the pathway together at the transition point, eliminating the need for separate mechanical fasteners that can create snag points during cable installation. Polycarbonate/ABS material choice balances rigidity (the fitting holds its shape under bundled cable weight) with some flex tolerance during seismic events, which is why it passes NEBS Level 3 shake-table testing. For integrators building out multi-row data centers or carrier hotels, this component is typically deployed at every row-end vertical transition point where overhead ladder rack drops to in-row equipment or where under-floor pathways rise to overhead distribution.

The UL 2024A listing is critical for installations subject to building code inspection — it certifies the complete pathway assembly (including fittings) as a tested fire-rated system, not just individual components. Telcordia GR-63-CORE compliance extends that to telecom central offices and colocation facilities where carriers require NEBS-certified infrastructure. The black finish keeps the raceway visually recessive in white-ceiling environments or blends into dark structural backgrounds in industrial builds. Actual field deployment: pair this inner angle with the corresponding outer angle (FROV4524X4LBL, sold separately), install at the desired transition point on your horizontal FiberRunner run, and secure per Panduit's installation instructions. The 4x4 designation refers to the 4-inch-wide by 4-inch-deep channel profile; confirm your existing FiberRunner system matches this size before ordering. Single-unit packaging means you'll need to count transition points and order accordingly — typical row build uses two fittings per vertical drop (one at top, one at bottom if reversing direction). This fitting does not include cover; if your installation requires enclosed raceway for plenum rating or physical security, specify FiberRunner covers separately.