Middle Atlantic Round PVC Floor BOX - 881

Middle Atlantic 881 Round PVC Floor Box

Overview

The Middle Atlantic 881 is a round nonmetallic (PVC) floor box designed for concrete floor installations where you need a clean, recessed infrastructure point for low-voltage wiring, AV connectivity, or power distribution in commercial and institutional environments. At 6.25 inches deep and 4.25 inches wide, the 881 fits comfortably in standard concrete pour depths while leaving adequate room for wiring terminations and device inserts. Its black finish blends with common commercial flooring trim, and TAA compliance makes it a straightforward specification for government, education, and federal contractor projects. Browse the full Middle Atlantic infrastructure catalog for compatible inserts, covers, and raceway accessories.

Key Features

• TAA Compliant: The 881 meets Trade Agreements Act requirements, which means it qualifies for GSA schedule purchases and government-funded projects without triggering a country-of-origin exception. If you're bidding on federal, state, or municipal work, TAA compliance is a hard checklist item — not having it disqualifies a product from many specs outright.
• Round Nonmetallic (PVC) Construction: PVC construction eliminates the corrosion risk you get with metallic boxes in wet-pour or moisture-exposed slab environments. It also simplifies grounding requirements compared to metal enclosures — one fewer step during rough-in inspection on non-metallic conduit runs.
• 6.25-Inch Installed Depth: The 6.25-inch (15.9 cm) height accommodates standard slab depths typical in commercial construction, providing adequate clearance for low-voltage modular inserts and wiring slack. Shallower boxes force tight bends that can stress cable jackets — this depth avoids that problem on most standard pours.
• 4.25-Inch Width (Round Form Factor): The 4.25-inch (10.8 cm) diameter is sized for single-gang or equivalent round insert configurations, keeping the floor footprint compact in high-traffic areas like conference rooms, open office floors, and auditoriums where tripping hazards and aesthetics both matter.
• 5.63-Inch Depth (Interior Volume): With 5.63 inches (14.3 cm) of interior depth, the 881 provides usable volume for wiring management — enough to dress and terminate multiple conductors without cramming, which matters when you're pulling both data and power to the same floor point.
• Black Color: The black finish is standard for commercial floor box trim integration, pairing cleanly with most aftermarket cover plate finishes in carpet, tile, and hardwood floor applications without requiring custom paint or finish work.

Integration & Compatibility

The 881 is designed to work within the floor box and raceway ecosystem common to commercial AV and low-voltage structured cabling installations. It is intended for concrete or hard-floor applications and is compatible with round nonmetallic floor box insert systems and cover assemblies standard to the industry. When specifying for a project, confirm that your cover plate and modular insert selection matches the round form factor and internal diameter of the 881 — square or rectangular inserts will not fit. For structured cabling projects requiring both data and power at the floor point, pair with appropriate power distribution inserts rated for the application. Verify local electrical code requirements for nonmetallic floor boxes in your jurisdiction before rough-in, as some jurisdictions impose additional conduit or sealing requirements for PVC enclosures in concrete. TAA-compliant projects should document the 881's compliance status in the project submittal package for review.

Frequently Asked Questions

Q: Is the Middle Atlantic 881 TAA compliant?

A: Yes. The 881 is confirmed TAA (Trade Agreements Act) compliant, making it eligible for GSA schedule purchases and government-funded projects that require country-of-origin compliance.

Q: What are the dimensions of the 881?

A: The 881 measures 4.25 inches (10.8 cm) wide, 6.25 inches (15.9 cm) tall, and 5.63 inches (14.3 cm) deep.

Q: Is the Middle Atlantic 881 suitable for concrete floor installations?

A: Yes. The 881 is a round nonmetallic (PVC) floor box designed for concrete floor applications, consistent with its product family designation as a concrete floor box.

Q: What color is the 881?

A: The 881 is black, which is the standard commercial finish for floor box trim integration across most flooring types.

Q: Can the 881 be used on government or federally funded projects?

A: Yes. The 881 is TAA compliant, which satisfies the country-of-origin requirements for federal procurement and GSA schedule specifications.

James Everett

The Middle Atlantic 881 is a product I specify when a project needs a TAA-compliant round nonmetallic floor box for concrete slab work — the 6.25-inch installed height and 5.63-inch interior depth hit the sweet spot for most commercial pour schedules without requiring special framing or slab coordination.

Technical Highlights:

• TAA Compliance: Verified TAA-compliant status means the 881 clears federal procurement gates without additional country-of-origin documentation — a time saver on government submittals where a non-compliant box can stall approval by weeks.
• 6.25 in Height / 5.63 in Depth: The height accommodates standard commercial slab pours while the 5.63-inch interior depth gives you room to dress wiring properly — tight boxes force cable bends that cause long-term jacket wear and make future adds or moves unnecessarily difficult.
• Round PVC Construction at 4.25 in Width: The nonmetallic round form factor eliminates metal corrosion concerns in moisture-exposed slabs and keeps the floor footprint small — important in open office and conference room environments where aesthetics and trip-hazard profiles are both in scope.

Deployment Considerations:

• Confirm your cover plate and modular insert selection is sized for the round form factor before ordering — square inserts will not fit the 881's round opening, and mis-specifying the insert is a common field error that delays finish work.
• Check local electrical code for nonmetallic floor box requirements in your jurisdiction before rough-in: some municipalities require additional conduit sealing or bonding steps for PVC enclosures set in concrete, even on low-voltage runs.

The 881 is the right call for TAA-required commercial buildouts — government offices, university classrooms, and federally funded conference centers — where a round nonmetallic floor point needs to pass procurement review and survive a concrete environment without corrosion or grounding complications.