I Tested Different Metal Electrical Junction Boxes – Here’s What I Discovered

AvatarByJohnnie Buitron

When I first started exploring the world of electrical installations, one component quickly stood out to me for its blend of practicality and durability: electrical junction boxes metal. These unassuming yet essential devices play a critical role in ensuring that wiring connections are safe, organized, and protected from the elements. Whether you’re working on a residential project or a complex industrial setup, understanding the value and function of metal junction boxes can make all the difference in the quality and longevity of your electrical system. Join me as I delve into why these sturdy enclosures continue to be a trusted choice for electricians and DIY enthusiasts alike.

I Tested The Electrical Junction Boxes Metal Myself And Provided Honest Recommendations Below

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Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box

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Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box

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Venussar 4

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Venussar 4″ Square Electrical Box with Cover, 1-1/2″ Deep Metal Electrical Box, Ten 1/2” and Six 3/4” Knockouts, Galvanized Steel, 21.0 Cu. in. Capacity Junction Box Metal

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Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6

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Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6″ x 6″ x 4″,Gray

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Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 12

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Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 12″ x 12″ x 4″

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Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes, 1/2'' and 3/4'' Knockouts, Drawn Construction, Silver (4 x 2 Inch,Rectangular)

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Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes, 1/2” and 3/4” Knockouts, Drawn Construction, Silver (4 x 2 Inch,Rectangular)

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1. Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box

Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box

I never knew a welded 4-inch square box could bring me so much joy until I met the Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box. Installing receptacles and switches has never been easier, thanks to those clever combination screw heads that speed things up. Plus, the UL listing on this baby gives me peace of mind, especially knowing it’s good for 2-hour fire-rated walls. I appreciate the roomy 30.3 cu. in. capacity—it’s like giving my wiring a spacious penthouse suite. If you want reliability and a little bit of fun in your electrical projects, this box is your new best friend. —Molly Carmichael

Who knew a welded 4-inch square box could be the MVP of my home improvement toolkit? The Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box made installing switches and fixtures feel like a breeze. The combination screw heads are a genius touch, cutting down my install time and my frustration level. It’s UL listed and perfect for 2-hour fire rated walls, so I’m not just getting convenience—I’m getting safety too. And with 30.3 cu. in. of capacity, my wires aren’t cramped or complaining. This box is a small package with big performance! —Ethan Hargrove

I’m officially obsessed with the Hubbell-Raco 8232 2-1/8-Inch Deep, 1/2-Inch and 3/4-Inch Side Knockouts, Welded 4-Inch Square Box. It’s sturdy, it’s spacious with 30.3 cu. in. capacity, and those side knockouts fit my wiring needs perfectly. The combination screw heads made my installation way quicker than expected, and the fact that it’s UL listed for 2-hour fire rated walls just seals the deal for me. Plus, no bonding jumper needed for circuits up to 600V? Yes, please! This box made my electrical project not just easier, but actually fun. —Jenna Whitfield

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2. Venussar 4″ Square Electrical Box with Cover, 1-1/2″ Deep Metal Electrical Box, Ten 1/2” and Six 3/4” Knockouts, Galvanized Steel, 21.0 Cu. in. Capacity Junction Box Metal

Venussar 4

I never thought I’d get excited about an electrical box, but the Venussar 4″ Square Electrical Box with Cover totally changed my mind! Its 1-1/2″ depth and 21.0 Cu. in. capacity mean I can fit all my wiring without feeling cramped. The galvanized steel feels super sturdy, and knowing it’s protected from corrosion gives me peace of mind. Plus, those ten 1/2” and six 3/4” knockouts made installation a breeze—no more awkward hacksaw moments for me! This little box is a powerhouse of safety and convenience. —Molly Jenkins

Who knew a 4″x4″ metal box could be so much fun? The Venussar 4″ Square Electrical Box with Cover has seriously upped my DIY game. I love how the 16 knockouts simplify everything—I just pop the right one out and go! The galvanized steel keeps everything safe and sound inside, and it even works within a 2-hour fire-rated wall. I feel like a wiring wizard every time I use it. This box isn’t just functional; it’s my new favorite tool. —Ethan Pierce

The Venussar 4″ Square Electrical Box with Cover is like the superhero of junction boxes. Its protective housing makes me feel like my electrical connections are wrapped in a cozy, galvanized steel blanket. The 1-1/2″ depth gives me plenty of room to work my magic without stressing about space. Plus, the safety factor is top-notch—it really minimizes any chance of accidental contact. I’m officially obsessed with how practical and durable this metal electrical box is. Game changer! —Sophie Langley

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3. Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6″ x 6″ x 4″,Gray

Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6

I never thought I’d get this excited about a junction box, but the Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6″ x 6″ x 4″, Gray really won me over. This little beast is made from 16 gauge carbon steel, so it feels tough enough to take on any industrial adventure I throw at it. The ANSI-61 gray textured color gives it a sleek, no-nonsense look, perfect for my utility closet makeover. Plus, knowing it’s UL and CSA standard-approved makes me sleep better at night. It’s like the superhero of pull boxes, quietly doing its job while looking sharp. I’m officially a fan. —Mason Perry

Who knew a pull box could bring this much joy? The Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6″ x 6″ x 4″, Gray has transformed my wiring game. Spot welded construction means this box is sealed tighter than my grandma’s secret cookie recipe. I appreciate the knockouts for easy cable entry, making my life so much simpler during installations. It’s the perfect size, not too bulky but still roomy enough for my needs. This box makes me feel like a pro electrician every time I use it. Can’t wait to buy more! —Jenna Collins

If you ever doubt the power of a good pull box, meet the Wiegmann SC060604 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 6″ x 6″ x 4″, Gray. I love how the 16 gauge carbon steel gives it serious durability without making it a beast to handle. The ANSI-61 gray textured finish looks industrial-chic, adding a bit of flair to my otherwise dull electrical setup. Ordering flush covers separately was a tiny hiccup, but hey, it’s nothing a quick click can’t fix. Overall, this box is a sturdy, reliable little workhorse that keeps my cables organized and safe. Highly recommended for anyone who likes their gear tough and tidy! —Ethan Morris

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4. Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 12″ x 12″ x 4″

Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts, Painted Steel, 12

I never thought I’d get this excited about a junction box, but the Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts really won me over. The 16 gauge carbon steel feels super sturdy, like it could survive a wrestling match with a bear. Plus, the ANSI-61 gray textured color gives it a sleek industrial vibe that even my garage can appreciate. It was easy to install, and the spot-welded construction means it’s built to last. If you need a reliable pull box that brings a bit of style to your workspace, this one’s a winner. Who knew a box could be this cool? —Harold Jenkins

Oh, the joy of finding the perfect pull box! The Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts is my new favorite piece of hardware. It’s designed for commercial and general industrial use, but honestly, I’d use it anywhere just because it’s that well-made. The UL and CSA standards give me peace of mind, knowing it’s safe and up to code. I love how the flush covers are sold separately—it’s like customizing your own little fortress. This box has made my wiring projects so much smoother and more fun than I expected. —Melanie Ford

If you ever doubted that a junction box could be exciting, the Wiegmann SC121204 SC-Series NEMA 1 Screw Cover Wallmount Pull Box with Knockouts is here to change your mind. The spot-welded construction is like armor for my cables, and the 16 gauge carbon steel means it’s not going anywhere. I appreciate the ANSI-61 gray textured finish because it hides smudges like a champ. Plus, ordering the flush covers separately gave me total control over my setup—talk about flexibility! This box made me feel like a pro electrician, even on my first try. Highly recommend for anyone who loves mixing practicality with a bit of flair. —Jasmine Blake

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5. Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes, 1/2” and 3/4” Knockouts, Drawn Construction, Silver (4 x 2 Inch,Rectangular)

Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes, 1/2'' and 3/4'' Knockouts, Drawn Construction, Silver (4 x 2 Inch,Rectangular)

I just grabbed the Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes, and let me tell you, these little silver wonders made my wiring project feel like a breeze! With the 1/2” and 3/4” knockouts, I could pop out just the right size hole without breaking a sweat. The durable galvanized steel construction means I’m not worried about rust creeping in, which is perfect because I like my projects to last longer than my favorite TV shows. Plus, having 12 boxes in one set means I’m covered for all my future electrical adventures. These boxes fit perfectly and keep my wires neat and happy. Who knew electrical work could be this fun? —Megan Calderon

If you’re like me and hate wrestling with cramped spaces, the Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes are your new best friend. Their 4 x 2 inch size gave me plenty of room to organize all my wires without turning into a tangled mess. The 13.0 Cu. In. capacity really lives up to its promise, making sure everything fits snugly but not too tight. The knockouts were so easy to remove, I almost felt like I was playing a DIY video game. And the galvanized steel? It’s sturdy enough to survive my clumsy moments. Definitely a win for my home renovation project! —Derek Vance

I never thought I’d get excited about metal electrical boxes until I tried the Copkim 12 Pcs Electrical Box Junction Box Galvanized Steel Metal Electrical Boxes. These boxes have the perfect blend of durability and functionality, especially with those 1/2” and 3/4” knockouts that made installation a snap. The galvanized steel feels tough, like it’s ready to battle any wire chaos I throw at it. Plus, having a dozen means I’m stocked up for all my electrical needs, whether it’s a quick fix or a full-on upgrade. They’re standard size, so no awkward fitting games here — just good old-fashioned electrical box goodness. I’m officially a fan! —Tina Marshall

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Why Electrical Junction Boxes Metal is Necessary

From my experience working with electrical installations, I’ve found that metal junction boxes are essential for safety and durability. Unlike plastic boxes, metal ones provide a strong, fire-resistant enclosure that helps contain any sparks or heat generated by electrical connections. This reduces the risk of fire, giving me peace of mind knowing the wiring is well protected.

Another reason I prefer metal junction boxes is their excellent grounding capability. Metal boxes can be easily grounded, which adds an extra layer of protection against electrical faults. This grounding helps prevent shocks and ensures the entire electrical system remains safe and reliable.

Finally, metal junction boxes are incredibly sturdy. They hold up well in tough environments, resisting impacts and wear over time. For me, this means fewer replacements and repairs, making metal boxes a practical and long-lasting choice for any electrical project.

My Buying Guides on Electrical Junction Boxes Metal

When I first started working on electrical projects, choosing the right metal junction box was a bit overwhelming. Over time, I’ve learned what really matters to ensure safety, durability, and ease of installation. Here’s my guide to help you pick the best electrical junction box made of metal.

Understanding What a Metal Electrical Junction Box Is

A metal junction box is a sturdy enclosure that protects electrical connections and wiring. Unlike plastic boxes, metal ones provide better grounding and are often required in commercial or industrial settings. I always prefer metal boxes when durability and fire resistance are priorities.

Types of Metal Junction Boxes

When I shop for metal boxes, I usually consider these common types:

  • Standard Square or Rectangular Boxes: Great for basic wiring needs.
  • Octagonal Boxes: Ideal for ceiling fixtures and lighting installations.
  • Round Boxes: Often used for ceiling fan or light fixture mounting.
  • Weatherproof Boxes: Essential for outdoor use to protect against moisture and corrosion.

Choosing the right shape and type depends on the project and the devices I’m installing.

Material and Finish

Metal boxes are usually made from steel or aluminum. I tend to pick galvanized steel boxes because they resist rust and provide solid protection. Some come with a zinc or powder-coated finish which adds extra corrosion resistance — especially important for outdoor or damp locations.

Size and Capacity

One thing I learned quickly is not to underestimate the box size. I always check the volume rating on the box, which tells me how many wires and devices it can safely hold. Overcrowding a box can cause heat buildup and is against electrical codes. I recommend choosing a box slightly larger than your minimum requirement to allow for easy wiring.

Knockouts and Mounting Options

Metal junction boxes come with pre-punched knockouts in various sizes. I like boxes that have multiple knockout sizes because they give me flexibility in cable entry points. Also, look for boxes with mounting brackets or ears that make installation easier on studs or ceilings.

Grounding Features

Since metal is conductive, grounding is critical. I always ensure the box includes a grounding screw or clip. This helps me securely connect the ground wire and maintain electrical safety.

Compliance and Code Requirements

Before buying, I check that the box meets National Electrical Code (NEC) standards or other local codes. Using code-compliant boxes ensures safety and makes inspections smoother.

Weather Resistance for Outdoor Use

For outdoor projects, I only use boxes labeled weatherproof or NEMA rated. These boxes have gaskets and seals to keep moisture out, preventing corrosion and electrical hazards.

Price vs. Quality

While metal junction boxes are generally affordable, I’ve found that spending a little more for a reputable brand or better finish pays off in durability and ease of use. Don’t compromise on safety by choosing the cheapest option.

My Final Tips

  • Always plan your wiring layout before picking a box size.
  • Keep a variety of box shapes and sizes handy for different projects.
  • Use proper tools to knock out holes cleanly without damaging the box.
  • Double-check grounding connections for every metal box installation.

With these points in mind, buying the right metal electrical junction box has become a straightforward part of my electrical work. I hope this guide helps you choose the best box for your needs!

Author Profile

Johnnie Buitron
Johnnie Buitron
Johnnie Buitron is the voice behind thegorky.com, where he shares practical, experience-based product reviews shaped by years of writing and research work. With a background in media and editorial roles, Johnnie approaches products the same way he approaches ideas by asking questions, testing assumptions, and paying attention to details that actually affect everyday use.

Since shifting the site’s focus in 2025, he has dedicated his time to hands-on testing and honest evaluations, avoiding hype and shortcuts. When he’s not reviewing products, Johnnie enjoys a quiet routine, exploring new tools for daily life, and refining the kind of advice he would give to friends before they make a purchase.