Best Electrical Boxes for Concrete Walls and in-Wall Installations
Choosing the right electrical box for concrete walls can improve safety, aesthetics, and ease of retrofit work. This guide reviews five solid options designed for in-wall and retrofit installs, including TV mounting scenarios and standard outlets. Each product is evaluated for space, durability, and compatibility with concrete substrates, helping you pick a box that fits your wall type and project needs.
| Product | Brand | Type | Notable Feature |
|---|---|---|---|
| in-Wall TV Box with Flange for Home Theater Installation | Dremica | In-wall receptacle box | Two outlets and multi-cable management for mounted TVs |
| Arlington TVL508-1 Low Profile TV Box | ARLINGTON | Low-profile box for shallow walls | Shallow drywall compatibility, compact depth |
| XGGYA Old Work Box | XGGYA | Old work plastic box | Rotatable buckle, easy retrofit; 1-gang, high compatibility |
| XIUTE 1-Gang PVC Old Work Box | YQXIUTE | Old work, PVC box | Flange, adjustable installation, ETL listed |
| Legrand Wiremold Starter Box | Wiremold | On-wall conduit starter box | Deep, versatile raceway and cable management |
Note: The listed products cover a range of installation scenarios—from in-wall, retrofit, to raceway-based solutions—aimed at concrete walls and retrofit environments. When selecting a box for concrete walls, consider depth, mounting method, cable management, and whether you need a box compatible with in-wall TV mounting or heavy-duty conduit systems.
In-Wall TV Box With Flange For Home Theater
The Dremica in-wall TV box is designed to sit between drywall and concrete panel constructions, providing ample space for multiple devices and clean wall aesthetics behind a mounted TV. Its two duplex outlets support common home theater gear like sound systems, satellite receivers, and streaming devices. A dedicated 1-1/2″ ENT entrance and brush openings for HDMI, Ethernet, and low-voltage cables support organized, hidden cabling. This box is well-suited for retrofit or new installations where a clean, flat TV wall is desired.
Key considerations:
– Space for multiple cables behind a wall-mounted TV.
– In-wall recessed design for a seamless look on concrete walls.
– Multi-cable organization with a sturdy entrance for low-voltage conduits.
Arlington TVL508-1 Low Profile Box
ARLINGTON’s TVL508-1 is a compact, low-profile box designed for shallow drywall depths of 1/2 to 5/8 inch. It has a shallow depth of 1.25 inches and includes a UL-listed decorative receptacle. This box is a practical choice when you need a discreet option behind a wall-mounted TV or in areas where space behind the wall is limited, including concrete-wall retrofit projects where a slim profile is essential.
Key considerations:
– Compatibility with very shallow wall cavities.
– Includes a decorator receptacle for clean aesthetics.
– Suitable for retrofit installations near concrete backing when depth is constrained.
XGGYA Old Work Box 1 Gang
The XGGYA old-work plastic junction box is designed for easy retrofit into existing walls. It features built-in fixing ears, a rotatable buckle to prevent drops, and a 4-1/3 inch length by 2-1/5 inch width by 2-3/4 inch depth footprint. This box is helpful when upgrading or adding outlets in concrete-wall projects where a secure, simple mounting solution is needed and when you require reliable support for low-voltage and standard wiring in one-gang configurations.
Key considerations:
– Simple retrofit with built-in fixing ears.
– Rotatable buckle helps prevent installation slippage.
– Size is suitable for single-gang outlets in concrete-wall retrofits.
XIUTE 1-Gang PVC Old Work Box
The XIUTE 1-Gang PVC old-work box offers a 14 cubic inch capacity, with a flange and adjustable mounting labels for easy installation into existing walls. It uses non-conductive PVC to simplify grounding requirements, which can reduce complexity in concrete-wall retrofits. Live hinges provide access to sheath cables and additional cable support. This box is suitable for standard outlets and switch installations when a robust, non-metallic option is preferred in concrete wall contexts.
Key considerations:
– Non-conductive PVC reduces grounding complexity.
– Adjustable mounting for precise installation.
– Suitable for single-gang outlets or switches in retrofit tasks.
Legrand Wiremold Starter Box
Legrand’s Wiremold Starter Box is an extra-deep on-wall conduit connector designed for heavy-duty applications and for installations where running raceway inside the wall isn’t feasible, such as concrete-block or brick walls. It serves as a central point for cable management and interconnection between raceway systems. The box is compatible with a full line of fittings to expand wiring solutions. It’s ideal for projects that require a robust external conduit path and clean wall aesthetics.
Key considerations:
– Deep on-wall conduit starter for heavy-duty usage.
– Useful when in-wall installation isn’t practical in concrete contexts.
– Broad compatibility with Wiremold raceway fittings.
Buying Guide
When selecting an electrical box for concrete walls, consider these factors to balance safety, installation ease, and future flexibility:
- Wall substrate and space: Concrete walls often require boxes with robust mounting options and sufficient depth to accommodate wires and devices. Measure cavity depth before choosing a box.
- Intended use: Are you installing a wall-mounted TV, standard outlets, or a raceway system? In-wall TV boxes require cable management features and multiple openings, while old-work boxes prioritize retrofit ease.
- Material and safety: PVC boxes simplify grounding and corrosion concerns in moist or variable environments. Metal boxes may offer durability but require proper ground paths in concrete walls.
- Expansion potential: If you plan to add more devices, choose deeper or modular options (like multi-outlet configurations or raceway-compatible boxes) that accommodate future wiring.
- Finish and aesthetics: Consider decorative receptacles and faceplates that sit flush with wall surfaces to maintain clean, professional looks on concrete walls.
- Code compliance: Ensure boxes are ETL listed or UL listed for electrical safety and meet local building codes for retrofit or new-work installations in concrete structures.
In summary, for concrete-wall projects, prioritize boxes designed for retrofit or recessed installation with proper entry/exit points for cables, and select models that offer stable mounting, adequate space, and compatible accessories for your specific device mix—whether it’s a TV setup, traditional outlets, or a raceway system.