Top Electrical Boxes Contractors Trust for Tough Jobs
For most contractors, the Southwire 1-Gang 22 cu. in. Old Work Box is the best overall pick due to its rigid construction and easy installation in drywall. Its main advantage is the reliable clamping that holds wires securely, but it is limited to single-gang applications and not suited for new construction.
Selecting the right electrical box is a small decision that can have big consequences on a job site. A box that is too small, flimsy, or improperly rated can lead to code violations, safety hazards, and callbacks. Contractors need boxes that are durable, easy to install, and available in the right configurations for each phase of a project.
We compared a range of popular models from trusted brands, considering what professional electricians and remodelers report about their performance. This guide breaks down the strengths and limitations of each box to help you choose the one that fits your specific work, whether you are roughing in new construction, retrofitting existing walls, or wiring outdoor structures.
Our top picks
Southwire 1-Gang 22 cu. in. Old Work Box
The Southwire old work box is a favorite among electricians for its sturdy thermoplastic construction and integrated clamps that hold NM cable firmly. Its wings flip out easily to secure the box to drywall, and the 22 cubic inch capacity provides ample room for wires and devices. Users report that it seats flush with the wall consistently, making trim-out fast and professional.
Pros
- Rigid, impact resistant plastic that does not crack during installation
- Captive screws and quick snap-in clamps speed up wiring
- Wings adjust to grip various drywall thicknesses
Cons
- Only available in 1-gang, limiting multi-device installations
- Not rated for new construction without additional support
Carlon 1-Gang 22 cu. in. PVC New Work Box
Carlon’s PVC new work box is a staple for residential and commercial rough-ins. It is lightweight yet strong, and the built-in nails make attachment to studs quick. The box is compatible with non-metallic sheathed cable and offers a generous 22 cubic inches for splices. Electricians appreciate that it does not rust or corrode, making it suitable for masonry and damp locations as well.
Pros
- Nail on design speeds up framing installation
- Non-conductive and corrosion resistant
- Large capacity for multiple wires
Cons
- Nails can bend if not driven straight
- Not as sturdy as metal for exposed installations
Raco 1-Gang 18 cu. in. Metal Old Work Box
For contractors who prefer metal boxes for grounding and durability, the Raco old work box is a solid choice. It features a galvanized steel construction that stands up to abuse, and the built-in cable clamps accommodate both NM and armored cable. The box comes with screws for direct attachment to studs or drywall, but it is most often used with conduit in commercial settings.
Pros
- Metal provides excellent grounding path
- Very durable and resistant to damage
- Works with both cable and conduit
Cons
- Smaller capacity than plastic alternatives
- Edges can be sharp if not handled carefully
Arlington 1-Gang 22 cu. in. Old Work Box (Low Voltage)
Arlington’s low voltage box is designed for installing data, audio, and video connections. It has no cable clamps, allowing easy feed of multiple cables, and the open back simplifies wiring. The box mounts securely to drywall with the included screws and wings, and its deep design accommodates larger connectors. This is not for line voltage, but for network and AV installations it is a pro favorite.
Pros
- Open back makes pulling cables effortless
- Deep enough for large plugs and connectors
- Quick mounting with no mudding required
Cons
- Not for line voltage wiring
- Lacks built-in clamps for cable support
Bell 1-Gang Weatherproof While-in-Use Cover and Box
Bell’s weatherproof box with a clear while-in-use cover is a complete solution for outdoor outlets. The die-cast aluminum box is rugged and corrosion resistant, and the cover allows cords to plug in while keeping moisture out. Contractors like the extra space for GFCI devices and the durable hinge that stands up to frequent use. This box is UL listed for wet locations.
Pros
- Complete package includes weatherproof cover
- Rugged metal construction resists rust
- Large capacity for GFCI or duplex receptacles
Cons
- Bulky design may not fit all siding profiles
- Cover can be stiff when cold
Sigma Electric 1-Gang 22 cu. in. Old Work Box (5 Pack)
Sigma’s multipack of old work boxes offers a cost effective solution for large projects. Each box is made of sturdy plastic with easy to adjust mounting wings and built-in cable clamps. They meet code requirements for most residential applications. While they may not have the premium feel of some brands, they perform reliably and save time on ordering.
Pros
- Lower per unit cost for large jobs
- Consistent dimensions for repeat installations
- Cable clamps grip wire securely
Cons
- Plastic is not as impact resistant as some competitors
- Wings require careful tightening to avoid stripping
Raco 4-Inch Square Metal Box (1-1/2 Inch Deep)
This 4-inch square box from Raco is a workhorse for commercial electricians. It can be used as a junction box or with a mud ring to support multiple devices. The galvanized steel is strong and can be used with conduit or cable. Its depth provides ample space for splices, and the knockouts allow for various entry points. This is a go to box for custom installations.
Pros
- Can support multiple devices with mud rings
- Very durable and long lasting
- Flexible for both junction and device boxes
Cons
- Requires additional mud ring for devices
- Heavier and harder to work with in tight spaces
The lineup, side by side
| # | Model | Material | Best for | Score | Price |
|---|---|---|---|---|---|
| 1 | Southwire 1-Gang 22 cu. in. Old Work Box | Thermoplastic | Retrofit and drywall installations | 9.4 | Check price |
| 2 | Carlon 1-Gang 22 cu. in. PVC New Work Box | PVC | New construction and concrete applications | 9.2 | Check price |
| 3 | Raco 1-Gang 18 cu. in. Metal Old Work Box | Galvanized steel | Metal boxes and conduit systems | 8.9 | Check price |
| 4 | Arlington 1-Gang 22 cu. in. Old Work Box (Low Voltage) | PVC | Low voltage and data wiring | 8.7 | Check price |
| 5 | Bell 1-Gang Weatherproof While-in-Use Cover and Box | Die-cast aluminum | Outdoor receptacles and GFCI protection | 9.0 | Check price |
| 6 | Sigma Electric 1-Gang 22 cu. in. Old Work Box (5 Pack) | Thermoplastic | Contractors buying in bulk | 8.5 | Check price |
| 7 | Raco 4-Inch Square Metal Box (1-1/2 Inch Deep) | Galvanized steel | Commercial and industrial applications | 8.8 | Check price |
Before you buy
Questions worth asking
What is the difference between a new work and old work electrical box?
New work boxes are installed before drywall and attach directly to framing. Old work boxes are used after drywall is up and clamp to the drywall material. They are also called ‘cut-in’ boxes.
Can I use a plastic box for metal conduit?
No, plastic boxes are not designed for metal conduit. If you are using conduit, you need a metal box that is bonded to the conduit system for grounding.
How do I determine the right size electrical box?
The box must have enough cubic inches to accommodate the number of conductors and devices. The NEC provides tables for minimum box fill. For general use, a 22 cu. in. box is a safe choice for one device with up to four 12 AWG wires.
What does ‘while-in-use’ cover mean?
A while-in-use cover, also called a ‘bubble cover’, allows you to plug a cord into an outdoor receptacle while keeping the cover closed to protect from moisture. This is required for outdoor outlets in many jurisdictions.
Can I install an old work box in lath and plaster walls?
Yes, but you need a box with deep wings or a special plaster ear. Some old work boxes have adjustable wings that can grip thicker wall surfaces. Check the box specifications for compatibility.
Are metal boxes required for commercial buildings?
Many commercial buildings use metal conduit, which requires metal boxes. However, in some jurisdictions, plastic boxes are allowed for non-metallic cable. Always check local codes.
Can I use a low voltage box for electrical outlets?
No, low voltage boxes are not rated for line voltage (120/240V). They are only for data, audio, or video wiring. Using them for power outlets is a safety hazard and code violation.
How many wires can fit in a 22 cubic inch box?
Using the NEC fill calculation for 12 AWG wire, each conductor takes 2.25 cubic inches. A 22 cu. in. box can hold up to 9 conductors, but you must subtract space for devices and clamps. Typically, it can handle one device and up to four 12/2 cables.
Our take
For most contractors, the Southwire 1-Gang 22 cu. in. Old Work Box is the best choice because it combines ease of installation with reliable performance in retrofit work. If you primarily do new construction, the Carlon nail-on PVC box offers unbeatable speed and durability. For outdoor projects, the Bell weatherproof box is the clear winner. Invest in a mix of these three to cover the majority of your jobs efficiently.
