Best Concrete Floor Box Kit for Quick, Durable Installations
Choosing the right concrete floor box kit ensures a clean, safe, and reliable power or data outlet in new or existing slabs. This guide highlights five top options based on box size, weatherproofing, and ease of installation. Each product includes practical features for concrete floors, from built-in knockouts to tamper-resistant outlets. Use the buying guide at the end to compare key considerations and help you select the best fit for your project.
| Product | Brand | Key Feature | Typical Use |
|---|---|---|---|
| Leviton 2-Gang Concrete Floor Box System, FBBOX-GY | Leviton | 2-Gang PVC box with 6.25″ height; needs FBLEV-GY and finished floor plate | Power and data outlets in concrete floors |
| Arlington FLBC4580 Recessed Floor Box | ARLINGTON | Round recessed box, aluminum/brass options, 15A receptacle | New or existing concrete floors |
| RACO 6239NI Floor Kit | RACO | Recessed duplex 15A TR, adjustable steel box, intelligent wiring access | Power and data with flush surface |
| ARLINGTON FLBC4500 Concrete Floor Box | ARLINGTON | Low profile, includes mud cover and divider | New concrete installations |
| Bryant Electric RF400 Floor Box | Bryant Electric | PVC box with protective cover; quick leveling system | Slab-on-grade installations |
id=”product-leviton”>Leviton 2-Gang Concrete Floor Box System

Product overview: Leviton’s 2-Gang Concrete Floor Box System (FBBOX-GY) provides a flexible mounting foundation for power and data in new or retrofit concrete floors. The system uses a 2-Gang PVC box with a 6.25-inch height. Note that a FBLEV-GY and a Leviton finished floor plate must be purchased separately. The kit supports fast installation with integrated conduits for reducers, simplifying on-site wiring in concrete structures.
id=”product-arlington-round”>Arlington FLBC4580 Recessed Floor Box

Product overview: The Arlington FLBC4580 line offers a recessed round floor box designed for concrete floors, with brass or nickel finishes. It includes a 15 amp Decora style power outlet and is optimized for a clean, economical installation in both existing and new concrete surfaces. The kit supports a straightforward pathway for wiring and a professional finished look in high-traffic areas.
id=”product-raco-6239ni”>RACO 6239NI Floor Kit

Product overview: The RACO 6239NI floor kit features a recessed duplex 15A TR device and an adjustable steel box in nickel finish. It includes back and side knockouts for flexible wiring access and a design to minimize surface protrusion. Pre-assembled flange and cover enable quick installation, and neoprene gaskets allow independent use of either side when the cover is closed, improving versatility for power and data needs.
id=”product-arlington-4500″>ARLINGTON FLBC4500 Concrete Floor Box

Product overview: The Arlington FLBC4500 focuses on a robust concrete floor box solution with a mud cover and divider. It is designed for durable, long-lasting performance in new concrete installations, helping separate power and low-voltage circuits while maintaining a clean, professional appearance on the floor surface.
id=”product-bryant-rf400″>Bryant Electric RF400 Floor Box

Product overview: The Bryant RF400 is a PVC box-based floor box designed for slab-on-grade installations with a quick, leveling system. Its recessed receptacle minimizes plug protrusion, allowing furniture placement over the outlet, and it comes with a pre-assembled flange, cover, and leveling ring for fast setup in concrete floors.
id=”buying-guide”>Buying Guide
Key considerations help ensure you pick the right concrete floor box kit for your space:
- Box type and capacity: Determine how many outlets you need and whether you require power-only or power plus data. Recessed duplex or multi-gang configurations offer flexibility for future upgrades.
- Concrete compatibility: Some kits are designed specifically for new concrete or existing slabs. Verify compatibility with your floor type and installation method.
- Finish and corrosion resistance: Brass, nickel, or plastic finishes provide different aesthetics and durability. In high-traffic areas, corrosion resistance and finish longevity matter.
- Accessibility and safety: Look for tamper-resistant receptacles, back/side knockouts for wiring, and features that reduce protrusion to avoid tripping and furniture conflicts.
- Installation speed: Pre-assembled flanges and covers, leveling rings, and mud covers can significantly cut on-site installation time.
- Weather and dust sealing: If the installation is near moisture-prone areas, select kits with appropriate seals and gaskets to prevent debris ingress.
- Future upgrades: Consider a modular system that allows adding data ports or modular inserts as needs evolve.
In summary, for retrofit or new concrete floors, prioritize a kit with robust wiring access, a well-sealed box, and a finish that withstands foot traffic. If you anticipate changing outlet configurations, choose a design with adjustable or configurable outlets and easy installation features to minimize remodeling complexity.