Best Concrete Electrical Floor Box Solutions for Modern Rooms
Answering what to choose for concrete floors, this guide compares top concrete floor box options. It helps builders, electricians, and homeowners pick reliable, install-friendly boxes for new pours or existing slabs. The selections below focus on durability, ease of installation, and compatibility with concrete floors. Best for: contractors seeking quick installs, DIYers tackling new pours, and designers prioritizing clean in-floor power and data access.
Summary table of selected products
| Product | Brand | Best For | Notes |
|---|---|---|---|
| Leviton 2-Gang Concrete Floor Box System | Leviton | Two-gang power and data needs in new concrete pours | Requires FBLEV-GY and floor plate separately |
| ARLINGTON FLBC4500 | ARLINGTON | Low-profile, for new concrete installations | Includes mud cover and plastic construction |
| ARLINGTON FLBC4580 | ARLINGTON | Recessed power and data for existing or new concrete | Brass finish option; round kit |
| Lew Electric FBKIT – Round PVC Floor Box | Lew Electric | Round PVC box with adapter ring for concrete floors | Outside diameter 5″, inside 4.5″ |
| Hubbell S1PFB SystemOne | Hubbell Wiring Systems | Economical, in-floor delivery in open plan spaces | Non-corrosive plastic, universal cover compatibility |
Leviton 2-Gang Concrete Floor Box System
The Leviton FBBOX-GY 2-Gang PVC concrete floor box is designed for two-gang power and data installations in new or poured concrete. It requires the FBLEV-GY and a Leviton finished floor plate, both sold separately. Best for: projects needing a two-outlet arrangement in a new concrete pour and where a separate finishing plate is preferred for customization. Limitation: box height is 6.25 inches, which may impact ceiling or cabinet clearance in tight spaces.
Best for: professionals who want modular components and a dedicated finish plate to match décor. Why selected: this setup supports two-gang configurations with conduit reducers for power and data, offering flexibility during rough-in and clean final finishes.
ARLINGTON FLBC4500 Concrete Floor Box
ARLINGTON FLBC4500 emphasizes a low-profile, plastic construction with a mud cover, designed for new concrete installations. Best for: builders prioritizing a lightweight, affordable option for new pours. Limitation: plastic construction may be less durable in high-traffic or commercial settings compared to metal alternatives.
Best for: quick, straightforward installations where a mud cover helps conceal the opening. Why selected: its simple design and dedicated mud cover help streamline rough-in and finishing steps on fresh concrete slabs.
ARLINGTON FLBC4580 Recessed Floor Box
ARLINGTON FLBC4580 is a recessed power and data round floor box designed for existing or new concrete floors. It fits most 4.5″ inside diameter round PVC boxes and offers finish options in Brass or Nickel. Best for: spaces needing a discrete, round recess in concrete with flexible finish choices. Limitation: kit fits specific round PVC boxes and may require compatible components for a complete system.
Best for: modular retrofits or new builds where a round, recessed look is preferred. Why selected: its compatibility with 4.5″ round boxes and finish options provide design versatility in concrete environments.
Lew Electric FBKIT Round PVC Floor Box
Lew Electric FBKIT is a round PVC concrete floor box kit with an LRA-U adapter ring. Best for: projects requiring a standard round PVC box with a simple adapter for tight concrete pours. Limitation: products are designed around PVC round boxes, so metal or mixed-material configurations may require additional adapters.
Best for: straightforward round-box installations with a readily available adapter ring. Why selected: the kit provides a reliable round option with compatible sizing for concrete floors and a straightforward installation flow.
Hubbell S1PFB SystemOne Floor Box
The Hubbell S1PFB SystemOne is a non-corrosive plastic floor box with 100 cubic inches capacity, designed for open-plan spaces. It features a universal cover mounting directly to the floor box riser, simplifying installation by removing the need for an extra adapter collar. Best for: budget-friendly, in-floor delivery systems in open layouts. Limitation: may offer fewer metal durability advantages compared to metal-box alternatives in heavy-use environments.
Best for: economical in-floor power and data solutions where the universal cover adds installation simplicity. Why selected: its non-corrosive plastic construction, ease of install, and integrated cover system make it a versatile choice for clean, open spaces.
Buying Guide
What should you consider when choosing a concrete floor box?
- Floor type and installation stage: new pours versus existing slabs affect box type (mud cover, recessed or pedestal, round or rectangular).
- Box material: plastic vs metal; plastic boxes resist corrosion and are typically lighter, while metal options can offer higher durability in high-traffic areas.
- Configuration: number of outlets, data jacks, and the need for modular components or integrated covers.
- Cover and finish: whether to pair with a matching floor plate or finish plate for aesthetics and safety.
- Compliance: ensure compatibility with local electrical codes and that installation follows best practices for concrete pours.
What installation approach fits your project?
- New concrete pours: select boxes designed for pour-in installation with mud covers or low-profile housings.
- Retrofits: consider recessed or adjustable boxes that fit existing voids or round PVC layouts.
- Open-plan spaces: SystemOne-style covers and larger capacity boxes can simplify wiring and access for open layouts.
Data and power considerations
- Plan for power, data, and communication needs (Ethernet, USB, outlets) to avoid later retrofits.
- Check compatibility of reducers, adapters, and knockouts to accommodate different conduit sizes.
- Consider future expandability if you anticipate adding more outlets or data ports later.
Installation tips
- Ensure precise alignment with floor level and surrounding surface for a seamless finish.
- Follow manufacturer guidelines for mud cover installation to prevent debris intrusion.
- Use appropriate sealing materials to prevent moisture ingress into concrete floor boxes.
FAQ
- What is a concrete floor box used for?
A concrete floor box provides in-floor electrical, data, and sometimes USB outlets for rooms with concrete floors, enabling clean, accessible power and connectivity. - Do I need specific floor boxes for new pours versus existing floors?
Yes. New pours benefit from boxes designed to be embedded during curing, while existing floors may require recessed or retrofit kits to fit existing openings. - Can I mix different brands in the same installation?
It’s possible with compatible adapters, but it’s best to use components designed to work together to ensure proper fit and code compliance. - Are these boxes weatherproof or suitable for outdoor use?
The listed options are generally for indoor concrete floors; outdoor or moisture-prone areas require boxes rated for moisture resistance and applicable outdoor standards. - What maintenance is required for floor boxes?
Regular inspection of seals, covers, and knockouts helps prevent debris buildup and ensures reliable operation of outlets and data ports.