Middle Atlantic 4ATCP4RBZ Bronze Surface Poke-Thru Floor Box
The Middle Atlantic 4ATCP4RBZ is a prewired, surface-cover poke-thru device designed for commercial floors where you need to bring power to workstations, AV systems, or security equipment without cutting into a raised-access floor system. At 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm), it accommodates two duplex outlet positions and arrives prewired — reducing on-site labor at installation.
Key Features
- Surface Cover Style: The surface-mount cover sits flush against the floor finish rather than recessing below it — suitable for concrete slabs and low-profile installations where core drilling depth is limited.
- Two Duplex Outlets: Two duplex positions support simultaneous power drops for multiple devices at a single floor location — useful for conference rooms, security stations, or AV lecterns where running separate drops to each device would mean additional conduit runs.
- Prewired from the Factory: The 4ATCP4RBZ ships with internal wiring already run, so the installer connects line-side conductors and devices without routing wire inside the body on-site. Reduces installation time and eliminates a common source of wiring errors in tight floor-box enclosures.
- Bronze Finish: The bronze color coordinates with commercial flooring hardware in hospitality, corporate, and higher-education environments where silver or black covers would stand out against warm-tone finishes.
- 21-Inch Body: The 21" overall length accommodates the conduit stub-up geometry typical of commercial concrete construction, giving installers clearance to terminate conductors without forcing bends.
Integration & Compatibility
The 4ATCP4RBZ is part of Middle Atlantic's 4AT Evolution poke-thru line. It is intended for use in commercial power distribution layouts where floor-level power access points are required. Verify your floor-box rough-in dimensions against the 8.25" x 8.25" footprint before ordering — poke-thru devices are not interchangeable across manufacturers without confirming the core diameter. Consult your power planning layout to confirm circuit loading against the duplex outlet configuration before installation.
Frequently Asked Questions
Q: What is the cover style on the 4ATCP4RBZ?
A: The 4ATCP4RBZ uses a surface cover style, meaning the cover plate sits at floor level rather than recessing below the finished floor surface.
Q: How many duplex outlets does the 4ATCP4RBZ include?
A: It includes two duplex outlet positions.
Q: Does the 4ATCP4RBZ come prewired?
A: Yes — it ships prewired from the factory, reducing on-site wiring labor during installation.
Q: What are the overall dimensions of the 4ATCP4RBZ?
A: Overall dimensions are 21" x 8.25" x 8.25" (533.4 x 209.6 x 209.6 mm).
Q: What finish color is the 4ATCP4RBZ?
A: Bronze.
The 4ATCP4RBZ is a straightforward specification when you need a bronze-finish, surface-cover poke-thru with two duplex positions and factory prewiring — the prewired feature specifically matters in commercial retrofit jobs where electricians are working fast and the floor box is hard to access once set in concrete.
Technical Highlights:
- Factory Prewired: Internal conductors are run before the unit ships — the installer terminates line-side connections only, which cuts down wiring time inside the 8.25" x 8.25" enclosure where there is little room to work.
- Surface Cover: Unlike recessed covers that require precise floor depth matching, the surface cover tolerates minor variation in core depth — a practical advantage on poured concrete floors where achieving an exact slab depth is difficult.
- 21" Body Length: The 21" overall dimension provides conduit clearance for standard commercial stub-up configurations, accommodating typical conductor bend radii without forcing sharp turns inside the body.
Deployment Considerations:
- Confirm the 8.25" x 8.25" footprint against your core cut before ordering — poke-thru devices are keyed to a specific core diameter and are not field-adjustable to fit a different rough-in opening.
- The bronze finish is fixed — if your flooring hardware is black or stainless, order the appropriate color variant from the 4AT Evolution line rather than attempting a field refinish on an electrical cover.
The 4ATCP4RBZ is the right specification for corporate conference rooms, hotel meeting spaces, and security operations centers with warm-tone flooring where a bronze surface poke-thru with two duplex positions needs to land on a concrete slab without a raised-floor system underneath.
