Best 4 11/16 Deep Box Options for Safe, Organized Electrical Wiring
When selecting a 4-11/16 inch deep electrical box, the goal is clear: maximize space, ensure sturdy construction, and support a clean, safe wiring setup. This roundup highlights five top-rated options suited for different needs, from heavy-duty industrial use to compact residential projects. Best for: contractors needing high capacity and durable materials, homeowners tackling medium-scale wiring, and professionals requiring flexible knockouts for various conduits.
Below is a quick comparison of the featured boxes to help you choose at a glance.
| Product | Capacity | Material | Best For | Key Knockouts |
|---|---|---|---|---|
| Copkim 8 Pcs 4-11/16 x 4-11/16 Inch Metal Electrical Junction Box | 40.2 cu in | Galvanized steel | High-volume wiring projects | 1/2″ knockouts, TKOs on sides; 1/2″ & 3/4″ on bottom |
| RACO 262 Square Extension Ring, 4-11/16-Inch, 2-1/8-Inch Deep | — | Metal | Extending capacity or surface conduit boxes | Eight 1/2″ and four 3/4″ side knockouts |
| Copkim 2 Pcs Metal Electrical Junction Box, Deep Square | 40.2 cu in | Galvanized steel | Smaller, paired boxes for multi-location wiring | 6x 1/2″, 6x TKOs on sides; bottom 3x 1/2″ & 2x 3/4″ |
| Steel City 4-11/16 Inch Square Box, 42 Cu in | 42 cu in | Steel | Large residential/commercial wiring spaces | Welded construction; conduit-ready |
| (4 Pack) 4-11/16” Square Electrical Box, Welded | — | Welded steel | Bulk supply for industrial or multi-box installations | EKO knockouts; raised ground |
Copkim 8 Pcs 4-11/16 x 4-11/16 Inch Box
This package provides eight galvanized steel junction boxes with a total capacity of 40.2 cu in. Best for projects that need multiple, consistently sized boxes to house numerous connections without crowding. The design includes 6 side knockouts and 6 TKOs on the sides, plus 3 side 1/2″ knockouts and 2 bottom 3/4″ knockouts, all removable for flexible conduit routing. Choose this if you’re wiring a multi-box installation with consistent sizing and easier wire management. Caution: ensure proper support for heavier conduit loads and verify compatibility with existing knockouts.
RACO 262 Square Extension Ring, 4-11/16-Inch
Designed to add cubic capacity or serve as an outlet box for surface conduit, this extension ring provides flexibility for space-critical installations. It includes fast-install screws and TKOs for adaptable design. Best for projects where extra volume is required in a square layout or when converting a surface conduit setup. Choose this if you need additional room without replacing existing boxes. Limitation: not a full replacement box by itself; it complements a deeper box in the system.
Copkim 2 Pcs Deep Square, 4-11/16
Two deep square boxes offering 40.2 cu in. capacity, built from galvanized steel for durability and long-term use. The design mirrors the standard deep 4-11/16 box with multiple knockouts (6x 1/2″, 6x TKOs on the sides; 3x 1/2″, 2x 3/4″ on the bottom). Best for paired-box installations in tight spaces where consistent box depth matters. Better for projects needing a pair of boxes with the same specs. Caution: verify that the included knockouts meet your conduit size requirements.
Steel City 4-11/16 Inch Square Box, 42 Cu in
This welded steel square box offers 42 cubic inches of capacity and is designed for conduit applications with sturdy welded construction. Best for demanding installations that require a robust enclosure and ample room for wiring devices. The box’s wide space supports larger conductors and devices. Use with appropriate conduit fittings and ensure compatibility with mounting requirements. Limitation: welded construction may limit field modification options compared to knockouts-only designs.
(4 Pack) 4-11/16” Square Electrical Box, Welded
A four-pack of welded steel square boxes with EKO knockouts and extra space for industrial wiring. Best for bulk installations where many electrical connections must be housed in parallel boxes. The raised ground feature supports safer grounding practices. Choose this if you need multiple identical boxes for a large project. Limitation: bulk purchase may be unnecessary for small residential tasks.
Buying Guide: Key Purchase Considerations
What is the right depth and capacity for my project? For most residential wiring, a 4-11/16 inch deep box with around 40 cu in capacity balances space and manageability. For larger conductors or more devices, look for boxes offering up to 42 cu in or welded steel construction for durability.
What material should I choose? Galvanized steel boxes resist corrosion and are suitable for general use. Welded steel variants provide maximum strength for industrial settings, while lighter boxes may be easier to install in tight spaces.
How important are knockouts? Consider the number and arrangement of 1/2″ and 3/4″ knockouts on the sides and bottom. Removable knockouts enable flexible conduit routing and faster installations.
Is space a constraint? If wiring will occur in confined spaces, a deeper, higher-capacity box or a combination of multiple boxes may be preferable. Extension rings can add cubic capacity when replacing a box is not an option.
What about cost and bulk needs? If multiple locations require boxes, purchasing a pack can reduce labor time and ensure uniformity across the project. Verify that the included features match your conduit sizes and device types.
FAQ
- What is the standard depth for a 4-11/16 box? Most 4-11/16 inch boxes are around 2-1/8 inch deep, but variations exist, including deeper models for higher capacity.
- Are these boxes suitable for outdoor use? The listings emphasize galvanized or welded steel for durability; verify exposure resistance and use appropriate weatherproof enclosures if needed.
- Can I use TKOs for flexible conduit? Yes, many boxes include TKOs along with standard knockouts to accommodate different conduit types.
- Do these boxes require separate grounding? Some models include raised grounds or grounding provisions; check the product details to ensure compliant grounding in your installation.
- Is bulk packaging better for professional projects? Bulk packs reduce onsite stocking time and ensure consistency across multiple installations, but assess whether you need multiple boxes of the same type.
- What installation considerations exist for welded boxes? Welded boxes are sturdy and long-lasting, but plan for precise cutting and mounting, as field modification is more limited than with knocked-out boxes.