Panduit FRIV454X4LYL FiberRunner 4x4 Inside Vertical 45-Degree Bend

Overview

The Panduit FRIV454X4LYL is a 45-degree inside vertical angle fitting for the Panduit FiberRunner 4x4 system, designed to transition fiber runs from horizontal to vertical in a controlled upward arc within data center and telecom central office cable management pathways. Used in conjunction with the outside vertical connector FROV454X4LYL, it lets you change the plane of a straight horizontal run without tight bends that stress fiber. The yellow polycarbonate/ABS construction matches the FiberRunner 4x4 color coding so technicians can identify the routing system at a glance during moves, adds, and changes.

Key Features

• 45-Degree Inside Vertical Geometry: Creates a controlled upward bend from a horizontal run — the paired outside fitting FROV454X4LYL completes the plane change. Using both together means you're routing to standard, not improvising with zip ties.
• Polycarbonate/ABS Construction: This material combination provides the rigidity needed to hold cable weight in vertical runs while resisting the brittleness that affects pure polycarbonate in cold environments — relevant in raised-floor data halls where airflow drops temps near flooring.
• Yellow Color-Coding: FiberRunner yellow identifies this as the 4x4 system. In a dense cable plant with multiple FiberRunner sizes, color-coding prevents mis-routing fiber into undersized pathways that could violate minimum bend radius.
• UL Listed per 2024A: UL listing for optical fiber cable routing assemblies means the fitting has been tested for the load, temperature, and flammability characteristics required for permanent installation in commercial and data center environments — not just a commodity fitting.
• NEBS Level 3 / Telcordia GR-63-CORE Compliance: Meeting NEBS Level 3 requirements covers seismic, thermal, humidity, and fire resistance testing relevant to telecom central offices. If your project involves carrier or co-lo infrastructure, this certification removes a procurement hurdle.
• RoHS Compliant: Required for EU data center deployments and increasingly demanded by enterprise procurement for domestic builds as well — no special documentation chase at project close-out.
• Overall Dimensions (6.93 in H × 5.47 in W × 8.11 in L): These dimensions determine the clearance needed at the bend point. Budget roughly 7 inches of vertical clearance and 8 inches of horizontal depth at the transition — plan this before conduit or other pathways are committed.
• Package Quantity of 1, Carton of 5: Sold individually so you can match exact quantities to your routing plan. Order in carton quantities of 5 for full rack or row deployments to avoid per-unit handling surcharges.

Integration and Compatibility

The FRIV454X4LYL is designed exclusively for the FiberRunner 4x4 system. It pairs with the FROV454X4LYL outside vertical 45-degree connector to complete a full plane change in a horizontal run. It is not interchangeable with FiberRunner 2x2, 4x2, or 6x4 variants — verify your installed system size before ordering. For horizontal bends and tees, separate FiberRunner fittings apply; this fitting addresses only the inside vertical 45-degree transition. Compatible fiber management accessories including covers and mounting hardware for the 4x4 system are specified separately.

What's in the Box

• 1x Panduit FRIV454X4LYL FiberRunner 4x4 Inside Vertical 45-Degree Fitting

Frequently Asked Questions

Q: What companion fitting is required to complete a full plane change with the FRIV454X4LYL?

A: The FRIV454X4LYL inside vertical fitting must be paired with the FROV454X4LYL outside vertical 45-degree connector to complete a plane change from a straight horizontal FiberRunner 4x4 run.

Q: Is the FRIV454X4LYL compatible with FiberRunner sizes other than 4x4?

A: No. This fitting is specifically designed for the FiberRunner 4x4 system. It is not compatible with 2x2, 4x2, or other FiberRunner channel sizes.

Q: Does the FRIV454X4LYL meet NEBS requirements for telecom central office installations?

A: Yes. The FRIV454X4LYL meets the requirements for relevant tests in Telcordia GR-63-CORE and is compliant with NEBS (Network Equipment Building Systems) Level 3, making it suitable for carrier and co-location infrastructure projects.

Q: What is the UL listing applicable to the FRIV454X4LYL?

A: The FRIV454X4LYL is UL Listed per UL 2024A for assemblies for the routing of optical fiber cables.

Q: How many units come in a carton, and is it sold individually?

A: The FRIV454X4LYL is sold as a single unit (package quantity of 1). The standard carton quantity is 5 units.

Marty Allison

The FRIV454X4LYL is a straightforward fitting, but it's the kind of component that causes real project delays when it's missing or misspecified. The 45-degree inside vertical geometry — combined with the paired FROV454X4LYL outside fitting — is the only way to execute a proper horizontal-to-vertical plane change in a FiberRunner 4x4 run without improvising, and improvised bends in fiber plant tend to show up as attenuation problems six months after commissioning.

Technical Highlights:

• NEBS Level 3 (Telcordia GR-63-CORE): Seismic Zone 4, thermal shock, and fire resistance testing are covered — this matters specifically in co-location and carrier central office environments where equipment must meet NEBS as a procurement condition, not just a preference.
• UL 2024A Listing: The UL listing is for optical fiber cable routing assemblies specifically, not a generic plastics listing. This is the designation AHJs and data center commissioning checklists look for when verifying permanent infrastructure.
• Polycarbonate/ABS at 8.11 in length: The blended material holds the 8.11-inch body dimensionally stable under cable load — pure ABS would creep under sustained tension in a loaded tray; pure polycarbonate is brittle at low temps. The blend is the right call for a permanent install.

Deployment Considerations:

• Plan for 6.93 inches of vertical clearance and 8.11 inches of horizontal depth at every transition point before adjacent conduit or cable trays are secured — retrofit clearance is the most common install problem with this fitting.
• This fitting is not interchangeable with other FiberRunner channel sizes. Verify the installed system is 4x4 (138.9 mm wide) before ordering — the 4x2 and 6x4 variants use different fittings and the yellow color coding is shared across the 4x4 line, not unique to this angle type.

For a large co-location build or carrier central office where NEBS Level 3 compliance is a hard requirement and fiber routing discipline matters to SLA maintenance, the FRIV454X4LYL belongs in the bill of materials at every horizontal-to-vertical transition in the FiberRunner 4x4 backbone.