Middle Atlantic 4IN Unwired PT Assemblybk - 4ATCBK

Middle Atlantic 4ATCBK Unwired Surface-Cover Poke-Thru Floor Box Assembly

Overview

The Middle Atlantic 4ATCBK is an unwired, surface-cover poke-thru floor box assembly designed for structured AV and technology infrastructure installations where cable routing through the floor needs a clean, finished access point without pre-configured power or data outlets. At 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm), the 4ATCBK provides a full-size housing footprint that gives installers and end-users meaningful cable management capacity while preserving a professional finished appearance at the floor level.

This unit ships black from the factory, matching the surface-mount cover style to typical commercial and conference-room floor environments where neutral finishes are specified. The unwired configuration means you bring your own modules — power, data, HDMI, USB, or AV connectivity is field-configured to exactly what the room requires, rather than accepting a preset outlet layout that may not match the project spec.

Key Features

• Surface Cover Style: the surface-mount cover sits flush and finished at floor level without requiring a recessed cutout depth that some concrete or raised-floor systems can't accommodate — useful when slab depth is constrained.
• Unwired Configuration (0 Duplex Outlets): ships with no pre-installed power or data inserts, so the integrator specifies and populates only the modules the project calls for — no paying for outlets you won't use, and no ripping out pre-wired components that conflict with the electrical plan.
• 21" x 8.25" x 8.25" Overall Footprint: at over 21 inches long, the housing provides meaningful interior volume for routing multiple cable runs — suitable for conference tables, training rooms, or AV podiums where several cable types terminate at the same floor point.
• Black Finish: factory black matches dark carpet and tile environments common in corporate and hospitality AV installs without requiring field painting or custom covers.
• Part of Middle Atlantic's 4AT Evolution Line: the 4ATCBK fits within the Middle Atlantic product family, which means compatible insert modules and covers follow a consistent mechanical standard — simplifying procurement and future reconfiguration.

Integration and Compatibility

As an unwired assembly, the 4ATCBK integrates with structured cabling and floor-box infrastructure systems by accepting field-installed inserts for power, data, and AV connectivity. Installers working on AV rack and furniture systems will recognize the 4AT series as a standard Middle Atlantic floor access solution. Consult Middle Atlantic's insert module lineup to match the specific outlet types — duplex power, RJ-45, HDMI, or USB — your project requires. For projects where power planning is a factor, reviewing a power management guide before specifying outlet modules will help ensure the right circuit capacity is allocated at the floor point.

Frequently Asked Questions

Q: Does the 4ATCBK come with power outlets pre-installed?

A: No. The 4ATCBK is an unwired assembly with zero duplex outlets included. Power and data inserts are field-selected and installed separately to match the project's specific requirements.

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

A: The 4ATCBK measures 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm) overall.

Q: What color is the 4ATCBK?

A: The 4ATCBK ships in black from the factory.

Q: What cover style does the 4ATCBK use?

A: It uses a surface cover style, meaning the cover sits at floor level without requiring a deeply recessed cutout.

Q: Can I add both power and data modules to the 4ATCBK?

A: Yes — because the 4ATCBK ships unwired, the installer selects and populates compatible Middle Atlantic insert modules for power, data, AV, or USB connections based on the project specification. Verify module compatibility with Middle Atlantic's 4AT Evolution insert lineup before ordering.

Marty Allison

The Middle Atlantic 4ATCBK is the blank-slate version of the 4AT Evolution poke-thru line — and that zero-outlet, unwired configuration is exactly the right call for integrators who've been burned by pre-wired floor boxes that don't match the electrical or AV layout on arrival. At 21 inches long, there's real interior volume here for multi-cable runs.

Technical Highlights:

• Unwired / 0 Duplex Outlets: no pre-installed inserts means no conflict with the electrical plan and no labor to remove what you don't need — the assembly arrives ready for whatever module combination the project specifies.
• 21" x 8.25" x 8.25" Housing: the full-size footprint handles multiple cable types side by side — useful at a conference table where you're routing power, data, HDMI, and USB to the same floor point.
• Surface Cover Style: surface-mount installation avoids the deep concrete cutout that recessed covers require — relevant on slab floors or in renovations where cutting depth is restricted.

Deployment Considerations:

• The 4ATCBK ships with no inserts — confirm your Middle Atlantic insert module order is in the same PO, or the box arrives on-site empty and installation stalls.
• Surface cover style sits proud of the floor surface; verify with the GC that the finished floor spec accepts a surface-mount profile before rough-in, particularly on raised-floor or carpet-tile installations where a flush recessed cover may be the architectural requirement instead.

The 4ATCBK is the right spec for conference rooms, training centers, and AV podium installations where the outlet configuration isn't finalized at the time of rough-in — order the housing now, populate inserts when the AV drawing is locked.