Best Electrical Floor Boxes for Concrete Floors of 2026 and Beyond
When upgrading or wiring a concrete floor, choosing the right electrical floor box is essential for safety, accessibility, and aesthetics. This guide focuses on top options built for new or existing concrete, highlighting who each box serves best. Whether you’re installing a conference room, workshop, or living space, the selections below balance durability, ease of installation, and feature sets.
The following quick reference table summarizes five strong choices for concrete floors. Use it to compare sizing, materials, and intended use at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| Leviton 2-Gang Concrete Floor Box System | Structured installations with data and power needs | 2-Gang PVC box with 6.25″ height; requires FBLEV-GY and a floor plate |
| ARLINGTON FLBC4500 | New concrete projects needing mud cover | Low voltage divider and mud cover; plastic construction |
| Hubbell SystemOne S1PFB | Open-plan spaces needing in-floor delivery | Non-corrosive plastic, universal cover, economical |
| Arlington FLBC4580 Round | Existing or new concrete floors with round boxes | Recessed, round design with optional brass or nickel cover |
| Cantex 5133760 | Round PVC floor boxes with routing flexibility | Includes level ring and pour cover; various reducers |
Leviton 2-Gang Concrete Floor Box System
The Leviton 2-Gang Concrete Floor Box System is designed for installations that require both power and data in a floor, suitable for offices or multi-use spaces. This box is a 2-Gang PVC unit that stands 6.25 inches high, accommodating added wiring flexibility. Buyers should note that you must purchase a separate FBLEV-GY box lid and a Leviton finished floor plate to complete the installation. Best for projects where a durable, modular floor solution is planned and a complete finishing plate is part of the design plan. Caution: data and power reducers are necessary for certain configurations, so check compatibility before purchase.
Best for: Projects that need a larger, dual-gang footprint with future upgrade options.
Why selected: It provides a robust, scalable base with separate components to tailor the final installation. It’s a strong choice when a professional, long-lasting concrete floor solution is prioritized.
Limitation: Requires additional Leviton components (FBLEV-GY and floor plate) to finalize the system, which can add steps and cost to the project.
ARLINGTON FLBC4500 Concrete Floor Box
The Arlington FLBC4500 is aimed at new concrete installations that benefit from a mud cover and a clean, plastic-design floor box. Its low voltage divider helps separate circuits and data runs within the same opening. This solution is best for builders seeking a cost-efficient, straightforward installation for fresh concrete pours. Caution: it is designed for new concrete and may not fit existing floor configurations without modification.
Best for: New-construction projects requiring a simple, economical box with mud cover.
Why selected: Its plastic construction reduces weight and potentially simplifies handling during installation, while still delivering a reliable floor access point for power and data.
Limitation: Primarily intended for new concrete; retrofitting in established floors may require additional framing or adapters.
Hubbell S1PFB Non-Corrosive SystemOne
The Hubbell S1PFB SystemOne floor box offers a non-corrosive plastic construction and a compact footprint with an open-plan space delivery capability. It is an economical option designed for installations where the floor box must deliver power and data with minimal fuss. The universal cover mounts directly to the floor box riser, removing the need for an extra adapter collar. Best for: Spaces aiming for a clean look with straightforward installation and lower cost.
Why selected: Its direct-cover compatibility reduces parts and time, which helps lower installation complexity in larger open areas.
Limitation: Being an economical option, it may not offer the same bulk capacity or accessory depth as higher-end systems in very busy data and power environments.
Arlington FLBC4580 Recessed Round Floor Box
This recessed round floor box is designed for concrete applications and fits most 4.5-inch inside-diameter round PVC floor boxes. It comes with a choice of brass or nickel cover finishes and includes a 15-amp Decora-style power outlet. Best for: Projects requiring a circular floor opening with a durable, finished look and flexible cover finishes. Caution: It is explicit to concrete installations, so verify the exact box compatibility before purchase if retrofitting existing openings.
Why selected: The round format provides versatility for evenly distributing outlets around a room’s center, especially where rectangular boxes are impractical.
Limitation: Only compatible with certain 4.5″ round PVC boxes; verify the box’s dimensions and the cover finish to ensure a proper match.
Cantex Floor Box Base
The Cantex 5133760 floor box base provides a PVC solution for round installations with a 4-3/4″ hub configuration. It includes level rings and a pour cover, which helps create a stable base for concrete pours and a neat finish. Best for: Concrete projects needing a versatile base with included level and pour accessories. Caution: This base requires proper reducers for mounting cables and may need additional components to complete a full installation.
Why selected: It offers essential plumbing-like precision in concrete pours, making it a reliable choice for builders who want a solid base with practical accessories.
Arlington FLBC4580 Brass/Nickel Round Box
This variant of the Arlington recessed floor box emphasizes a round, concrete-only installation with brass or nickel cover finishes and includes a 15-amp Decora outlet. Best for: Existing concrete installations where a premium cover finish is desired and corrosion resistance or aesthetic matters are prioritized. Caution: Pick the finish and installation kit that matches the room’s hardware to ensure a seamless look.
RACO 6299 Round Floor Box Cover Kit
The RACO 6299 cover kit pairs with Hubbell-raco 5511 floor boxes and uses a gray cover with duplex flaps. The flaps close automatically, helping prevent debris and reducing trip hazards when receptacles are not in use. Best for: Floor boxes that require a debris-blocking cover without needing a full lid replacement. Caution: It’s designed for specific Hubbell-raco boxes; ensure compatibility before purchase.
Buying Guide: Key Considerations For Concrete Floor Boxes
- Box size and capacity: Match the number of outlets and data ports to your needs. Dual-gang or round boxes provide more flexibility for power and data.
- Material and durability: Plastic boxes are lightweight and corrosion-resistant; metal finishes like brass or nickel offer a premium aesthetic but may require more care in wet environments.
- Concrete compatibility: Some boxes are labeled specifically for new concrete; others work in existing floors with a different installation approach.
- Cover and finish options: Consider whether you need mud covers, level rings, or decorative floor plate finishes to align with interior design.
- Accessibility and safety: Ensure the cover design prevents debris ingress and minimizes trip hazards when outlets are not in use.
- Installation complexity: Some systems require additional components (like specific floor plates or reducers). Plan for component compatibility.
- Future-proofing: If data is part of the plan, verify that the box supports data risers or has space to add outlets without rework.
FAQ
- What is a concrete floor box used for?
– It provides a protected, accessible point for power and data outlets embedded in a concrete floor nozzle or opening. - Do I need a mud cover for concrete floor boxes?
– Depending on the model, a mud cover helps seal and finish the installation for a clean look and debris prevention. - Can I install a floor box in existing concrete?
– Yes, many boxes are designed for retrofitting, but verify the product’s compatibility with your concrete opening and sizing. - What finishes should I choose for a visible floor box?
– Choose a cover finish (brass, nickel, or gray) that matches the surrounding hardware and room aesthetics. - Are these boxes suitable for open-plan offices?
– Boxes with in-floor delivery capability and universal covers are well-suited for open spaces requiring flexible data and power access.