Panduit FRT12X4W4LBL FiberRunner 12x4 Horizontal Tee Fitting with 4x4 Exit
Overview
The FRT12X4W4LBL is a horizontal tee fitting for Panduit's FiberRunner™ fiber routing system, purpose-built to split a horizontal 12x4 fiber run at 90° while routing a secondary 4x4 pathway off the side. In data centers and central office telecom environments where fiber density is high and routing paths must stay organized, this fitting lets you branch cleanly without bending fibers beyond safe bend-radius limits. It ships individually (package quantity: 1) and installs directly into the FiberRunner 12x4 system — no field fabrication, no improvised cuts.
Constructed from polycarbonate/ABS in matte black, the fiber routing fittings category of the FiberRunner line covers the full geometry set: end caps, bends, crosses, and tees like this one. The FRT12X4W4LBL handles the horizontal tee case specifically — where two horizontal runs meet and you need to divert a branch without dropping to vertical or changing duct size mid-run.
Key Features
- 12x4 to 4x4 Horizontal Tee Geometry: Creates a 90° branch exit sized at 4x4 off a 12x4 horizontal trunk. This preserves full 12x4 capacity on the straight-through path while dedicating a clean 4x4 channel to the branch — you don't sacrifice trunk capacity to serve the branch run.
- Overall Dimensions (17.61 in L × 12.96 in W × 4.22 in H): At just over 17.6 inches long and 4.22 inches tall, this fitting slots into standard above-ceiling and under-floor pathways without requiring additional overhead clearance. Confirm your pathway depth before ordering — the 4.22-inch height is the constraint in tight plenum spaces.
- Polycarbonate/ABS Construction: The PC/ABS blend delivers the rigidity needed to support cable weight in long horizontal runs while remaining light enough not to overload mounting hardware. In central office environments with temperature cycling, polycarbonate holds dimensional tolerances better than cheaper PVC alternatives.
- RoHS Compliance: Restricts hazardous substances throughout the fitting's material stack. Required for any deployment into EU-destined equipment or for facilities with environmental compliance mandates — and increasingly a baseline expectation for enterprise data center builds regardless of geography.
- UL-Listed Optical Cable Management (to 2024A): UL listing for fiber cable management assemblies is the floor for compliance in North American commercial construction. The 2024A designation confirms this fitting meets current NEC requirements for optical fiber routing — relevant when your project needs sign-off from an AHJ or your integrator carries liability on code compliance.
- Telcordia GR-63-CORE and NEBS Level 3 Compliance: GR-63 covers physical protection requirements — seismic, thermal, fire — for network equipment used in carrier and central office environments. NEBS Level 3 is the full telecom hardening standard. If you're installing in a carrier-grade facility or a hardened enterprise core, this is the compliance tier your procurement team will ask for. Not all commercial fiber duct meets this standard.
- FiberRunner 12x4 System Compatibility: Designed exclusively for the FiberRunner 12x4 system. This is a system-specific fitting — it will not mate with other duct widths or competing fiber pathway products. Verify your installed base is FiberRunner 12x4 before ordering.
- Versatile Branch Options: The tee supports multiple overflow and transition options within the FiberRunner ecosystem, including overflow fittings, vertical tees (three-face trumpet transitions), corrugated conduit transitions, and direct FiberRunner continuation. That flexibility matters in real builds where a single branch point may need to feed multiple downstream pathways of different types.
Integration & Compatibility
The FRT12X4W4LBL is a system fitting within the Panduit FiberRunner™ product family. It integrates with FiberRunner 12x4 duct sections, covers, mounting hardware, and the full range of FiberRunner bends, crosses, and end caps. For fiber optic cable management planning, pair this tee with FiberRunner straight sections, vertical tee fittings, and appropriate covers (sold separately) to complete the pathway.
This fitting does not include covers — order FiberRunner 12x4 and 4x4 compatible covers separately based on your pathway design. The polycarbonate/ABS construction is compatible with standard fiber slack management and FiberRunner accessories including mounting brackets and cable tie-down hardware.
What's in the Box
- 1× Panduit FRT12X4W4LBL FiberRunner 12x4 Horizontal Tee Fitting (4x4 exit, black)
Frequently Asked Questions
Q: What duct size does the FRT12X4W4LBL work with?
A: The FRT12X4W4LBL is designed specifically for the Panduit FiberRunner 12x4 system. The straight-through path is 12x4 and the branch exit is 4x4. It is not compatible with other FiberRunner sizes or non-Panduit fiber duct systems.
Q: Is the FRT12X4W4LBL RoHS compliant?
A: Yes. The FRT12X4W4LBL is RoHS compliant, restricting hazardous substances in its material construction. It is also UL-listed for optical cable management assemblies up to the 2024A standard.
Q: Does the FRT12X4W4LBL meet NEBS requirements?
A: Yes. The FRT12X4W4LBL complies with Telcordia GR-63-CORE seismic and environmental standards and meets Network Equipment Building Systems (NEBS) Level 3 requirements — the full carrier-grade hardening standard for central office and telecom facility deployments.
Q: Does the FRT12X4W4LBL include covers?
A: No. The package contains one tee fitting only (quantity: 1). Compatible FiberRunner 12x4 and 4x4 covers must be ordered separately.
Q: What are the overall dimensions of the FRT12X4W4LBL?
A: The fitting measures 17.61 inches (overall length) × 12.96 inches wide (329.2 mm) × 4.22 inches tall (107.2 mm). Verify pathway clearance — particularly the 4.22-inch height — before installation in constrained plenum or under-floor spaces.
Q: What material is the FRT12X4W4LBL made from?
A: The FRT12X4W4LBL is constructed from a polycarbonate/ABS blend in matte black. This material provides structural rigidity for supporting cable weight across horizontal runs while maintaining dimensional stability through the temperature cycling typical in data center and central office environments.
The FRT12X4W4LBL sits at a specific decision point in FiberRunner 12x4 pathway design: you have a high-density 12x4 trunk running horizontally and need to break off a 4x4 branch at 90° without interrupting the trunk capacity. Most integrators overlook the fitting's NEBS Level 3 / GR-63-CORE compliance when scoping commercial data center work — that standard is non-negotiable in carrier and central office environments and differentiates this from generic cable tray solutions.
Technical Highlights:
- Trunk/Branch Size Ratio: The 12x4 straight-through preserves full trunk capacity while the 4x4 exit handles branch routing — no derating of the main run to feed the branch.
- Overall Height 4.22 in (107.2 mm): This is the critical dimension in above-ceiling or under-floor plenum routing. Measure your clearance before spec'ing — at 4.22 inches tall, this fitting can conflict with HVAC diffusers or structural members in shallow plenums.
- UL Listing to 2024A: Current NEC cycle compliance is built in. For projects requiring AHJ sign-off, this eliminates a common inspection flag on fiber pathway fittings.
Deployment Considerations:
- This fitting is FiberRunner 12x4 system-specific — confirm your installed duct is 12x4 before ordering. It will not adapt to 6x4 or 4x4 trunk runs, and there is no adapter to bridge sizes at this fitting.
- Covers are sold separately. In high-traffic data center floors or open overhead pathways, uncovered fiber duct is a common inspection and liability issue — budget covers into your BOM at the same time you order the tee.
The FRT12X4W4LBL is the right spec for carrier-grade central office builds and enterprise data centers running Panduit FiberRunner 12x4 infrastructure — specifically where a 90° horizontal branch to a secondary 4x4 zone is required and GR-63/NEBS Level 3 compliance is part of the facility standard.
