Middle Atlantic Pdstl Fitting 11/4IN Opng - 525C

Middle Atlantic 525C In-Floor Pedestal Service Fitting for Cable Management

Overview

The Middle Atlantic 525C is a four-piece in-floor pedestal service fitting designed to extend structured cable management systems to audio/video and communications endpoints at the point of use. Where raised-floor pedestals or in-floor monument boxes need a clean, code-friendly termination point for A/V cabling — think boardrooms, training facilities, operations centers, or AV-over-IP infrastructure deployments — the 525C provides a 1-1/4-inch grommet opening that keeps cables dressed, protected, and accessible without requiring conduit runs to every seat or workstation. This is a finishing component, not a passive duct, which means it belongs late in the installation sequence once your in-floor pathway is already planned and roughed in.

As part of the broader Middle Atlantic cable management ecosystem, the 525C is purpose-built to integrate with pedestal-style in-floor systems rather than surface-mounted or overhead routes. That distinction matters at the planning stage: if your design calls for furniture-fed or floor-box distribution to AV devices, this fitting is the right termination hardware. If your route is overhead or wall-based, look elsewhere in the family.

Key Features

• Four-Piece Construction: The 525C ships as a four-piece assembly, which means the fitting can be disassembled for initial rough-in and reassembled with cables in place — a practical advantage on active job sites where cable pulls happen in stages rather than all at once. You are not fishing cables through a fully assembled ring after the fact.
• 1-1/4-Inch Grommet Opening: The 1-1/4-inch opening is sized for typical low-voltage communications bundles — HDMI, DisplayPort, USB, Dante/AES67 ethernet, or control cabling — without forcing integrators to upsize the floor monument box for a single service point. It keeps the footprint minimal while accommodating real-world bundle diameters common in A/V infrastructure.
• In-Floor Pedestal Mounting: Designed specifically for in-floor pedestal systems, the 525C anchors to the pedestal body rather than sitting loose in a cutout. This eliminates the cable-sag and lateral movement that plagues improvised grommet solutions in raised-floor environments, and it maintains the mechanical integrity of the pedestal system across the cable's service life.
• Audio/Video Service Extension: The 525C was developed to expand the service range of in-floor pedestals to include A/V devices — not just power or data. That scope matters when specifying for unified AV/IT infrastructure where a single pedestal location needs to serve both network drops and display cabling without a secondary monument box.
• Commercial-Grade Cable Management: Positioned within Middle Atlantic's structured cable management product line, the 525C carries the build quality expected in commercial integration work — consistent fit with mating pedestal components, durable grommet material rated for the mechanical stress of repeated cable dressing and occasional reconfiguration.
• Clean Finished Appearance: In customer-facing or executive-space deployments, the four-piece fitting presents a finished surface at the floor level, covering the raw pedestal opening and providing a professional termination that passes architectural review in high-visibility spaces.

Integration & Compatibility

The 525C is designed for use within in-floor pedestal cable management systems — confirm that your pedestal body accepts a 1-1/4-inch service fitting before specifying. Middle Atlantic structures their cable management line to coordinate across pedestals, monuments, and service fittings, so cross-referencing against your pedestal model in the Middle Atlantic catalog is the right first step. For broader structured cabling and pathway planning, consult a cable management planning guide to align conduit sizing, fill ratios, and termination hardware before procurement.

The 1-1/4-inch opening accommodates typical low-voltage A/V and communications bundle diameters. If your cable count or individual cable diameter exceeds that opening, evaluate larger service fitting options within the same family rather than forcing cables through an undersized grommet — compressed grommet seals degrade the cable jacket over time and create strain-relief problems at the termination point.

This fitting does not supply power, does not include connectivity hardware, and is not a floor box or monument enclosure — it is the service termination component that caps a pedestal opening. Pair it with appropriate cable pathway and pedestal components for a complete in-floor distribution solution.

Frequently Asked Questions

Q: What is the opening diameter of the Middle Atlantic 525C?

A: The 525C has a 1-1/4-inch grommet opening, sized for standard low-voltage A/V and communications cable bundles including HDMI, ethernet, USB, and control cabling.

Q: How many pieces does the 525C assembly include?

A: The 525C is a four-piece fitting. The multi-piece design allows the fitting to be disassembled for cable pull-through and reassembled in place, which is useful on phased installation schedules.

Q: What mounting system does the 525C work with?

A: The 525C is designed for in-floor pedestal cable management systems. It is not a surface-mount or wall-mount fitting — confirm compatibility with your specific pedestal model before ordering.

Q: Can the 525C be used for both data and audio/video cables?

A: Yes. The 525C was specifically designed to extend in-floor pedestal systems to include audio/video devices in addition to standard communications cabling, making it suitable for unified A/V and IT infrastructure deployments.

Q: Does the 525C include a grommet or is that a separate component?

A: The 525C is described as a complete service fitting with a 1-1/4-inch opening; the grommet is integral to the fitting assembly. No separately ordered grommet is indicated in the product evidence.

Q: Is the 525C suitable for raised-floor data center environments?

A: The 525C is designed for in-floor pedestal systems, which are common in raised-floor commercial and operations center environments. Verify that your pedestal system accepts this fitting size and form factor for your specific floor tile or monument configuration.

James Everett

The Middle Atlantic 525C is a component I specify whenever a pedestal-fed in-floor distribution layout needs a clean service termination for A/V runs — the four-piece design is the detail that actually makes a difference on the job site. On phased installs where AV cable pulls happen after the floor covering goes in, that disassembly-and-reassembly capability saves real labor versus trying to fish cables through a one-piece ring after the fact.

Technical Highlights:

• 1-1/4-Inch Opening: This diameter is the right call for typical A/V and communications bundles — HDMI, CAT6, and control cabling all pass without forcing. Size up only if you're running unusually large or high-count bundles; don't oversize the fitting just to have clearance, or you lose the cable-dress and strain-relief benefit the grommet provides.
• Four-Piece Assembly: Disassemble during rough-in, pull cables, reassemble with cables dressed through the fitting. This is the practical workflow on any installation where the pedestal gets set before the cable run is finalized — which is most commercial AV jobs.
• In-Floor Pedestal Mounting: The 525C locks to the pedestal body, not a loose cutout. That mechanical attachment keeps the fitting stable across the cable's service life, especially in conference or training room environments where the cable is flexed repeatedly as equipment is repositioned.

Deployment Considerations:

• Verify pedestal compatibility before procurement — the 525C is designed for in-floor pedestal systems and the 1-1/4-inch opening dimension needs to match the service fitting receptacle on your specific pedestal model. Assuming cross-compatibility within the Middle Atlantic line without cross-referencing the pedestal datasheet is the most common spec error on this component.
• The 525C covers communications and A/V service only — it does not include power, does not support a power module, and is not a monument box. If your pedestal location needs both power and AV termination, that requires a separate power fitting or a different monument solution alongside this component.

The 525C is the right fitting for operations centers, boardrooms, and training rooms where in-floor pedestal systems feed A/V endpoints at collaboration furniture — any environment where cable dress, appearance, and the ability to reconfigure without tearing up the floor matters more than raw throughput.