Middle Atlantic AV3CTCBS Poke-Thru Floor Box with Prewired 20A Duplex Receptacle

Overview

The AV3CTCBS is a poke-thru floor box assembly from the Middle Atlantic AV3 series, built around a 4in (102mm) diameter core and prewired with a 20A duplex receptacle. It's the finish flange and slide holder configuration in a brass finish, designed to bring commercial-grade power to a conference table, AV credenza, or floor-mounted equipment rack without running surface cable. If you're specifying floor power for a boardroom or command center install, the AV3CTCBS gives you a single clean penetration point instead of a tangle of extension cords crossing the floor.

Key Features

• 1x 20A duplex receptacle, prewired: the unit ships wired and ready, so field electricians aren't terminating conductors inside a cramped floor box on-site — that cuts install time and reduces the chance of a bad termination getting buried under flooring.
• Standard or isolated ground wiring: lets you match the receptacle to the load — isolated ground is the right call for sensitive AV or IT equipment where shared-ground noise can show up as hum or interference on audio and video lines.
• 4in (102mm) core hole size: a fixed, known cutout dimension means the core drilling can be scheduled and coordinated with the concrete or floor contractor well before the AV3CTCBS itself arrives on site.
• Minimum 1/8in floor covering thickness rating: confirms the flange is built to sit flush across typical carpet tile, LVT, or thin hard-surface flooring without a proud edge that becomes a trip hazard.
• Finish flange in Brass: a durable, commercial-grade cover finish for floors that see regular foot traffic and furniture movement — Middle Atlantic also offers this AV3 flange in Gray, Black, Ivory, and Brushed Aluminum if brass doesn't match the room's hardware palette.
• Adapter compatibility with Legrand AVIP, Extron MAAP mini, Wiremold Open System, and Ortronics TracJack/Series II: the AV3CTCBS floor box accepts modular inserts from these systems, so you're not locked into a single connectivity vendor when you need to add data, AV, or specialty jacks alongside the 20A power later.
• TAA compliant: relevant for government, education, and other institutional projects that require Trade Agreements Act compliance on procured hardware.
• 2.00 lb shipping weight: a compact, easy-to-handle component for electricians and AV integrators staging multiple floor boxes across a single job.

Integration & Compatibility

Because the AV3CTCBS accepts Legrand AVIP, Extron MAAP mini, Wiremold Open System, and Ortronics TracJack/Series II adapter plates, it works as a shared power-and-data floor box rather than a power-only unit — pair it with the appropriate manufacturer insert to add RJ45, HDMI, or fiber pass-throughs in the same 4in core. That flexibility matters most in conference rooms and training spaces where the floor box has to serve both a power strip and a laptop input plate from one penetration. For rooms built around AV over IP distribution, running the data adapter in the same AV3CTCBS core as this 20A duplex keeps cabling centralized at the table rather than split across two separate floor penetrations. Anyone planning a full room build should also check a PoE and power planning guide before finalizing which floor boxes carry power versus data-only runs, since not every AV3 configuration includes a receptacle. The broader Middle Atlantic catalog carries the matching mounting solutions and rack accessories used to terminate the other end of these floor runs, and the mounting solutions category is worth a look if this floor box is feeding a nearby equipment rack or credenza.

Warranty

The AV3CTCBS carries a 2-year warranty, specifically 1-year from installation or 2-years from day of sale, whichever applies to your project timeline — worth noting on jobs where there's a gap between purchase and final commissioning.

Frequently Asked Questions

Q: What size hole do I need to cut for the AV3CTCBS?

A: The AV3CTCBS requires a 4in (102mm) diameter core hole.

Q: Does the AV3CTCBS work with standard or isolated ground wiring?

A: Yes, the receptacle wiring supports either standard or isolated ground, depending on the load requirements.

Q: What finish options are available for the AV3CTCBS flange?

A: This listing is the Brass finish; Middle Atlantic also offers Gray, Black, Ivory, and Brushed Aluminum for the same AV3 flange and slide holder configuration.

Q: Is the AV3CTCBS TAA compliant?

A: Yes, the AV3CTCBS is TAA compliant, which matters for government and institutional procurement.

Q: What's the warranty on the AV3CTCBS?

A: 2 years total — 1-year from installation or 2-years from day of sale, whichever comes first.

Q: What flooring thickness does the AV3CTCBS support?

A: A minimum floor covering thickness of 1/8in is required for the flange to sit correctly.

Jerry Tildsen

The AV3CTCBS is one of those parts that looks simple on a cut sheet but saves a lot of grief on install day — it's a prewired 20A duplex poke-thru, so the electrician isn't stripping and terminating conductors inside a 4in floor core with a flashlight in their teeth.

Technical Highlights:

• Prewired 1x 20A duplex receptacle: factory termination means the on-site labor is drop-in and torque-down, not full wiring — meaningful on multi-box conference room jobs where every extra termination point is another callback risk.
• Standard or isolated ground wiring: gives you the option to isolate the ground for AV or IT loads sharing the same room as lighting or HVAC circuits, which is the difference between clean audio and a 60Hz hum on a boardroom mic feed.
• 4in (102mm) core with 1/8in minimum floor covering rating: a known, coordinated cutout size that flooring contractors can plan around, and a flange rated to sit flush on typical carpet tile or LVT rather than proud and catching feet.

Deployment Considerations:

• Coordinate the 4in core cutout with the general contractor before the concrete pour or floor prep is finalized — retrofitting a poke-thru into finished flooring is a much bigger job than planning it in.
• The AV3CTCBS is the power-only brass flange variant; if the room also needs data, HDMI, or fiber at the same floor point, you'll need to pair it with a compatible Legrand AVIP, Extron MAAP mini, Wiremold Open System, or Ortronics TracJack/Series II insert rather than assuming power and data both ship in this SKU.

This is the right poke-thru for a boardroom table or credenza install where you need a clean, flush 20A duplex at floor level and want the flexibility to add a data or AV insert from a separate adapter down the line — not a fit if you need data pass-through included in the box out of the gate.