Middle Atlantic AV3CTCAB Poke-Thru Floor Box with Prewired 20A Duplex Receptacle

The Middle Atlantic AV3CTCAB is a poke-thru floor box assembly built to bring power to furniture, workstations, and AV equipment through a finished floor without running conduit along a wall or column. It ships prewired with a 20A duplex receptacle, so the electrical connection is done at the factory rather than pieced together on site. If you're specifying floor-level power/comm access for a conference room table, a trading floor desk cluster, or an AV rack island in the middle of a room, the AV3CTCAB is the kind of hardware that determines whether that install goes cleanly or turns into a punch-list item.

Overview

This unit is the "AB FL & AB CV 20A/COMM CO" configuration — a floor flange (FL) and cover (CV) combination sized for a 20A commercial (COMM) circuit-out application. It's designed to drop into a 4'' (102mm) diameter core-drilled hole in a finished floor, with the flange and cover finished in brass for a look that holds up in higher-end commercial interiors better than the standard aluminum or plastic trims sold with entry-level poke-thru kits. Because it's prewired for a 20A duplex outlet, the electrician's field work is limited to landing the branch circuit rather than assembling and testing the receptacle in the box.

Key Features

• 20A Duplex Receptacle: Rated for a full 20A commercial circuit rather than the 15A duplex found in residential-grade poke-thrus — matters when you're feeding AV racks, monitors, or multiple laptop chargers off one floor point without derating concerns.
• Standard or Isolated Ground Wiring: The receptacle wiring supports either standard grounding or isolated ground configurations, which lets an integrator match the unit to a facility's existing electrical noise-isolation strategy — isolated ground matters most where sensitive audio or data equipment shares a floor with lighting or motor loads.
• Prewired, Adapter-Ready Design: Factory-prewired construction means less field termination time and fewer points where a loose wire nut turns into a callback six months later.
• 4'' (102mm) Core-Drill Hole Size: A standard 4'' diameter cutout lines up with common core-drilling bit sizes, so a contractor isn't stuck sourcing a non-standard hole saw for a one-off box.
• 1/8'' Minimum Floor Covering Thickness: The flange and cover are engineered to sit correctly with as little as 1/8'' of finish flooring (tile, carpet tile, LVT) above the slab — worth checking against your actual floor buildup before ordering, since a thicker finish floor can change how flush the cover sits.
• Brass Finish: Brass resists the scuffing and discoloration that painted or anodized covers show after a few years of foot traffic and rolling chair casters — a practical upgrade anywhere the floor box is in a visible, high-traffic zone rather than tucked under furniture.
• Slide Holder Design: The slide/holder mechanism is part of what lets the flange and receptacle assembly seat and lock into the drilled opening as a unit, simplifying the final mechanical fit versus a box and cover sourced as separate parts.
• TAA Certification: Compliant with the Trade Agreements Act, which matters directly if this box is going into a GSA contract, federal building, or any project with TAA sourcing requirements written into the spec.

Integration & Compatibility

The AV3CTCAB is described as adapter-ready, meaning the poke-thru assembly is built to accept compatible Middle Atlantic accessory modules rather than being a fixed, single-purpose box — useful if a room's power/data mix changes after initial construction. It pairs naturally with the rest of a room's AV over IP and control infrastructure where floor-level power delivery feeds a table box, a credenza-mounted rack, or a freestanding AV cart. For the broader connectivity and mounting hardware that typically rounds out a room build, browse the mounting solutions category alongside this unit, and consult a PoE and power planning guide when scoping how floor power ties into rack and equipment loads elsewhere in the room. The full Middle Atlantic product line includes matching poke-thru covers and flange finishes if you need to standardize hardware finish across multiple rooms in the same building, and cable management accessories from the cables category are worth reviewing for dressing the branch circuit and any low-voltage runs sharing the same core-drilled path.

Frequently Asked Questions

Q: What size hole does the AV3CTCAB need in the floor?

A: It's designed for a 4'' (102mm) diameter core-drilled opening.

Q: What amperage is the AV3CTCAB receptacle rated for?

A: It comes prewired with a 20A duplex receptacle.

Q: Can the AV3CTCAB be wired with an isolated ground?

A: Yes — the receptacle wiring supports either standard or isolated ground configurations.

Q: What finish does the AV3CTCAB come in?

A: Brass.

Q: How thick does my finished floor covering need to be for the AV3CTCAB?

A: A minimum of 1/8'' floor covering thickness is required for correct fit.

Q: What's the warranty on the AV3CTCAB?

A: It carries a 2-year warranty.

Karl Wilson

The AV3CTCAB is one of those parts that only gets attention when it's wrong, and by then it's set in concrete. The spec that matters most before you order it is the 4'' (102mm) core-drill hole size — that's the number your core-drilling sub needs before they show up on site, not after.

Technical Highlights:

• 20A Duplex Receptacle: Prewired at the factory for a full 20A commercial circuit, which covers AV racks and multi-device floor drops without the derating headaches of a 15A residential-grade poke-thru.
• Standard or Isolated Ground Wiring: Gives the electrician a choice at termination time — isolated ground is the right call when this floor point shares a panel with lighting or motor loads near sensitive AV gear.
• 1/8'' Minimum Floor Covering Thickness: This is a hard constraint, not a suggestion — confirm your finished floor buildup (tile, LVT, carpet tile) clears this minimum before the box gets set, or the cover won't sit flush.

Deployment Considerations:

• Because it's brass rather than the standard aluminum trim, this is the version to spec for a boardroom or lobby floor box where the cover is visible and gets stepped on daily — it holds finish longer than lower-grade metals.
• Watch the floor covering thickness spec closely on renovation jobs — if the existing slab-to-finish-floor buildup exceeds what the flange was designed around, you may need a different Middle Atlantic poke-thru variant rather than forcing this one to fit.

Good fit for a conference room table power/data drop or a trading-floor desk cluster where a 20A commercial circuit and a durable brass cover both matter — less suited to a low-traffic back-office install where a standard-finish poke-thru would do the job for less.