Middle Atlantic 4IN PREWIREDSURFACE4RECBK - 4ATCP4RBK

Middle Atlantic 4ATCP4RBK Prewired Surface Poke-Thru Floor Box

Overview

The Middle Atlantic 4ATCP4RBK is a prewired, surface-cover poke-thru floor box from the Middle Atlantic AV and infrastructure line, designed to bring power and low-voltage connectivity up through finished concrete or raised-access flooring in conference rooms, boardrooms, huddle spaces, and open-plan commercial environments. At 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm), this is a full-depth unit intended for slab applications where a flush inset isn't feasible — the surface-mount cover sits proud of the floor, keeping the assembly accessible without a core-drill surround. Coming prewired from the factory, the 4ATCP4RBK reduces on-site termination time and eliminates the guesswork of field-wiring a floor device under a tight installation schedule.

The black finish integrates cleanly into contemporary flooring materials — dark carpet, polished concrete, or dark LVT — without the visual interruption of a chrome or stainless unit. If your space uses lighter flooring, verify the color fit before ordering; Middle Atlantic offers variants in other finishes within the poke-thru device category.

Key Features

• Factory Prewired: The 4ATCP4RBK ships with internal wiring already completed. On a commercial retrofit where electrician hours are billed at a premium, factory termination is a direct labor cost reduction — and it eliminates the risk of field-wiring errors inside a confined floor cavity.
• Two Duplex Outlets: Two duplex receptacle positions give you four total outlet faces in a single floor location. For a conference table with a laptop, display, and a video bar, that's typically sufficient without running a secondary floor box or surface raceway. If your deployment involves power-hungry A/V rigs or multiple workstation drops at a single table, plan for a second unit or a higher-capacity floor box.
• Surface Cover Style: The surface-mount cover means the assembly doesn't require a recessed pocket machined into the slab. This is the correct choice for retrofit installations in existing concrete floors where coring depth is limited or where the structural engineer has restricted below-slab penetrations. On new construction with adequate slab depth, a recessed/flush variant may present a lower trip hazard profile — weigh that against the added core work.
• 21" x 8.25" x 8.25" Housing: The 533.4 mm overall length accommodates the internal raceway and duplex mounting while keeping the footprint compact enough for under-table deployment. Confirm your floor cavity depth and any conduit routing requirements before committing — the 8.25" cross-section dictates the minimum core or cutout size.
• Black Finish: The all-black colorway is specified in the product data and suits environments with dark flooring or where a low-visual-profile floor device is preferred. Stainless or brushed finishes are more common in hospitality; black reads as commercial/enterprise in most integrator installs.
• Middle Atlantic 4AT Evolution Platform: This unit is part of Middle Atlantic's 4AT Evolution poke-thru family, which means replacement covers, inserts, and compatible AV infrastructure accessories are sourced from a known, maintained product line — not a one-off SKU with no upgrade path. That matters when a cover gets damaged two years post-install and you need an exact match without a full floor box replacement.

Integration & Compatibility

The 4ATCP4RBK is designed for integration into commercial AV and unified communications deployments — conference rooms, training spaces, and collaboration areas where power and low-voltage feeds are required at the table level. The prewired duplex outlets handle standard 120V AC loads; verify local electrical code compliance and confirm that the branch circuit feeding the floor box is appropriately protected before installation. Consult a licensed electrician for slab penetration, conduit routing, and final connection to the panel — floor box installations in commercial spaces typically require a permit.

For AV integrators pairing this with video conferencing infrastructure, the two-duplex layout supports a codec, display, and peripheral power without a secondary PDU in most single-table scenarios. If your room design calls for additional low-voltage ports (HDMI passthrough, USB-C, RJ-45), check the Middle Atlantic 4AT Evolution accessory inserts — the platform is designed for modular insert configurations, though specific insert compatibility should be confirmed against current Middle Atlantic product documentation.

Frequently Asked Questions

Q: What is the cover style on the 4ATCP4RBK — flush or surface?

A: The 4ATCP4RBK uses a surface cover style. The assembly sits proud of the floor rather than recessing flush into the slab, making it well-suited for retrofit installations where full-depth coring isn't practical.

Q: How many outlets does the 4ATCP4RBK provide?

A: The unit includes two duplex receptacle positions, providing four total outlet faces at a single floor location.

Q: Does the 4ATCP4RBK come prewired from the factory?

A: Yes. The 4ATCP4RBK is factory prewired, which reduces on-site termination labor and simplifies the electrician's installation process.

Q: What are the overall dimensions of the 4ATCP4RBK?

A: The unit measures 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm). Confirm your floor cavity and conduit routing requirements against these dimensions before ordering.

Q: What color is the 4ATCP4RBK?

A: The 4ATCP4RBK is finished in black, which integrates cleanly into dark flooring environments and contemporary commercial interiors.

Q: Is the 4ATCP4RBK part of an ongoing product family with available replacement parts?

A: Yes. This unit is part of Middle Atlantic's 4AT Evolution poke-thru platform. Replacement covers and compatible inserts are sourced from an active, maintained product line.

Ted Perry

The 4ATCP4RBK's surface cover style is the spec that determines whether this unit belongs in your project or not. If you're retrofitting power to an existing poured concrete slab and can't achieve the core depth a flush-mount demands, this is the correct call — the surface assembly clears the structural constraint without requiring additional slab work. I've specified Middle Atlantic poke-thru devices on conference room retrofits where the alternative was exposed floor raceway, and the 4AT Evolution platform consistently delivers a cleaner result.

Technical Highlights:

• Prewired from factory: Eliminates field-termination inside a confined floor cavity — a meaningful time save when your electrician is working in an occupied building on a tight cutover window.
• Two duplex positions (four outlet faces): Covers the typical single-table load — codec, display, laptop, peripheral — without a secondary floor box or surface-mounted PDU cluttering the space.
• 21" x 8.25" x 8.25" housing: At 533.4 mm overall length, this is a full-size unit. Size your conduit stub-up and floor cutout to the 8.25" cross-section before the concrete crew leaves the site — retrofitting that opening later is expensive.

Deployment Considerations:

• The surface cover sits above finished floor level — account for trip hazard clearances per your AHJ and verify furniture placement keeps the unit within a table's footprint or against a fixed base, not in an open pedestrian path.
• Only two duplex positions are confirmed in the evidence. If the room design calls for USB-C, HDMI passthrough, or additional data ports at the same floor location, confirm insert compatibility with current Middle Atlantic 4AT Evolution documentation before finalizing the order — do not assume modular inserts will fit without verification.

The 4ATCP4RBK is the right specification for conference room or boardroom retrofits on existing concrete slabs where a surface-mount profile is an acceptable trade-off for avoiding a full flush-core installation. It's not the right pick for high-traffic aisles or open-plan environments where a surface-proud cover creates a daily trip hazard — use a flush variant there if the slab depth allows.