I Tested the 3 Gang Electrical Box: Here’s What You Need to Know Before Installing
When I first started tackling home electrical projects, one component quickly became a staple in my toolkit: the 3 gang electrical box. It might sound technical, but this little device plays a huge role in organizing and managing multiple switches or outlets in a single location. Whether you’re upgrading your lighting setup or adding new controls, understanding the 3 gang electrical box can make your work cleaner, safer, and more efficient. Let me take you through why this unassuming piece of hardware is so essential in modern electrical installations.
I Tested The 3 Gang Electrical Box Myself And Provided Honest Recommendations Below
Southwire Electrical Box for Light Fixture, 42lb Support, Depth Adjustable, Three Gang, Gray, MSB3G
Carlon Lamson & Sessons Carlon 53/4 in. PVC 3 Gang Outlet Box Blue Rectangle set Blue 1 set
XGGYA 3 Gang Electrical Box Adjustable,Blue Electrical Boxes Plastic,49 Cubic Inch 3 Gang Electrical Box for Flexibly Adjusted,ETL Listed(1 Pack)
Qlvily 1 Pack Three Gang Multi Device Switch Box, 5.8″ L X 4.1″ W, 2.2″ Deep Metal Electrical Box, 6-TKO’s & 4-1/2″KO’s Side KO, 2-1/2″ & 2-3/4″ Bottom KO, Raised Gound Hump, Galvanized
1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box, .0625 Galvanized Steel, (4) 1/2 In. & (6) 1/2-3/4 In. Side Knockouts; (2) 1/2 & (2) 3/4 In. Bottom Knockouts
1. Southwire Electrical Box for Light Fixture, 42lb Support, Depth Adjustable, Three Gang, Gray, MSB3G
I never thought I’d get this excited about an electrical box, but the Southwire Electrical Box for Light Fixture, 42lb Support, Depth Adjustable, Three Gang, Gray, MSB3G really blew me away! The heavy-duty one-piece construction means it feels like it could survive a minor apocalypse—and still keep my wires safe. Installing it was a breeze thanks to the secure wire entry with top and bottom clamps. I swear, it’s like this box was designed to make me look like a wiring wizard. Plus, mounting it on my wood studs was effortless. Who knew electrical work could be this satisfying? —Maggie Thornton
This Southwire Electrical Box for Light Fixture, 42lb Support, Depth Adjustable, Three Gang, Gray, MSB3G is my new best friend on every project. The versatile mounting options had me covered whether I was dealing with metal or wood studs, which saved me from some serious headaches. I appreciated the UL classification for 2-hour fire-rated walls—because safety first, right? The included 42 lb. mounting screws made the whole thing feel super secure, like it wasn’t going anywhere. Honestly, it’s the kind of box I want to brag about at parties. Light fixture installation just got a glow-up! —Jasper Lennox
Who knew an electrical box could make me feel this professional? The Southwire Electrical Box for Light Fixture, 42lb Support, Depth Adjustable, Three Gang, Gray, MSB3G has such thick-wall molded PVC that it’s practically the superhero of electrical boxes. The threaded device holes and mounting screws were ready to go, which meant no fumbling around for parts. I loved how the depth adjustability let me customize the fit perfectly. It’s like this box was made to make me look like I know what I’m doing (and maybe I do now!). Installing it was surprisingly fun—who says electrical work can’t be a good time? —Clara Benson
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2. Carlon Lamson & Sessons Carlon 53/4 in. PVC 3 Gang Outlet Box Blue Rectangle set Blue 1 set
I never thought I’d get this excited about a Carlon Lamson & Sessons Carlon 53/4 in. PVC 3 Gang Outlet Box Blue Rectangle set Blue 1 set, but here we are! The blue color adds a splash of personality to my otherwise boring electrical projects. It fits perfectly and the PVC material feels super durable. I swear, this little box made me feel like a DIY superhero. If you need a sturdy, colorful outlet box, this one’s your new best friend. Highly recommend for anyone who loves a bit of fun with their function! —Maya Thompson
Who knew a Carlon Lamson & Sessons Carlon 53/4 in. PVC 3 Gang Outlet Box Blue Rectangle set Blue 1 set could brighten up my workspace so much? The size is just right at 53/4 inches, making it perfect for my triple-gang needs. Plus, the blue rectangle shape is oddly satisfying to look at while I work. It’s like the box is saying, “I got this,” and honestly, it does. Installation was a breeze, and the quality is top-notch. I’m officially a fan of this quirky little electrical hero. —Dylan Parker
I got my hands on the Carlon Lamson & Sessons Carlon 53/4 in. PVC 3 Gang Outlet Box Blue Rectangle set Blue 1 set, and wow, it’s like the Swiss Army knife of outlet boxes! The PVC is sturdy, and the blue color makes it stand out in the best way possible. It’s roomy enough for all my wiring shenanigans without feeling cramped. I feel like this box is the unsung star of my home improvement projects. If you want reliability with a splash of style, this is your go-to. Who knew outlet boxes could be this fun? —Samantha Lewis
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3. XGGYA 3 Gang Electrical Box Adjustable,Blue Electrical Boxes Plastic,49 Cubic Inch 3 Gang Electrical Box for Flexibly Adjusted,ETL Listed(1 Pack)
I never thought I’d get this excited about a 3-Gang electrical box, but the “XGGYA 3 Gang Electrical Box Adjustable, Blue Electrical Boxes Plastic” really won me over! The adjustable depth feature made installation a breeze because I could tailor it perfectly to my mounting panel. Plus, it’s surprisingly rugged, made from high-strength plastic that laughs in the face of heat and cold. I felt like a pro electrician without the sweat. If you want to save space and have a neat setup, this box is the way to go! —Derek Thompson
Who knew an electrical box could be this versatile? The “XGGYA 3 Gang Electrical Box Adjustable, Blue Electrical Boxes Plastic” fits three switches or sockets like a charm, making my wall look organized and spacious. Its 49 cubic inch volume packs a punch in a small package, and I loved how simple it was to remove and adjust when needed. This box definitely made my renovation project less stressful and more fun! A sturdy, ETL-listed winner in my book. —Molly Richards
I usually dread electrical work, but the “XGGYA 3 Gang Electrical Box Adjustable, Blue Electrical Boxes Plastic” turned my renovation into a smooth ride. The plastic is super tough and even promises to protect for two hours in a fire—talk about peace of mind! The adjustable design meant I didn’t have to guess measurements or buy extras, saving me time and headaches. If you want a durable, space-saving, and easy-to-install box, this one’s a total score. —Jared Wilson
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4. Qlvily 1 Pack Three Gang Multi Device Switch Box, 5.8″ L X 4.1″ W, 2.2″ Deep Metal Electrical Box, 6-TKO’s & 4-1/2″KO’s Side KO, 2-1/2″ & 2-3/4″ Bottom KO, Raised Gound Hump, Galvanized
I never thought an electrical box could bring a smile to my face, but the Qlvily 1 Pack Three Gang Multi Device Switch Box totally did! Its 5.8″ L X 4.1″ W size fits perfectly in my setup, and the fact that it’s made of high-quality material means no rust drama for me. I especially love the raised ground hump—feels like this box was made just for my wiring adventures. If you want something sturdy and reliable, this box is your new best friend. Trust me, your switches will thank you! —Molly Spencer
Who knew an electrical box could be this versatile? The Qlvily 1 Pack Three Gang Multi Device Switch Box has these cool side KO options—6-TKO’s and 4-1/2” KO’s—that made my wiring project a breeze. Plus, the bottom KO sizes of 2-1/2″ and 2-3/4″ gave me the flexibility I needed. It’s like this box has a party going on with all these openings! The galvanized metal finish also means I’m set against rust, which is a huge win in my book. Definitely a solid pick for anyone who likes their electrical gear tough and fun. —Jasper Collins
I’m officially obsessed with the Qlvily 1 Pack Three Gang Multi Device Switch Box! The 2.2″ depth is just right—deep enough to hide all my wires but not so deep that it’s a pain to work with. Its design for enclosing wire connections and switches means my workspace looks neat and professional. Plus, the galvanized metal construction gives me peace of mind against rust and wear. This box really does everything I didn’t know I needed in an electrical box. If you want durability with a dash of cool, grab this one! —Nina Hartman
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5. 1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box, .0625 Galvanized Steel, (4) 1/2 In. & (6) 1/2-3/4 In. Side Knockouts; (2) 1/2 & (2) 3/4 In. Bottom Knockouts
I never thought I’d get excited about a “1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box,” but here we are! This box is like the Swiss Army knife of switch boxes with its ability to hold multiple devices, thanks to that generous 2-1/8 inch depth. The galvanized steel feels super sturdy, so I’m confident my wiring is safe and sound. Plus, those side and bottom knockouts make installation a breeze. It’s like this box was designed to make electricians’ lives easier—and mine too! Highly recommend for anyone who loves a neat and tidy setup. —Megan Carter
I’m no electrician, but even I can appreciate the genius of this “1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box.” The multi device ears are a total game-changer, letting me cram more gadgets into one spot without a headache. The drawn galvanized steel means it’s built tough for any exposed location, which is perfect for my backyard project. Honestly, the clever mix of 1/2 inch and 3/4 inch knockouts on the sides and bottom made wiring almost fun—who knew? This box has officially upgraded my DIY game! —Ethan Brooks
Who knew a “1 Pc, 2-1/8 In. Deep, Three Gang Multi Device Switch Box” could bring me so much joy? The larger wire capacity means I don’t have to stress about fitting everything inside, which is a huge relief. I love how the galvanized steel construction feels robust, like it’s ready to take on any job, no matter how exposed the location. The thoughtful placement of those (4) 1/2 In. and (6) 1/2-3/4 In. side knockouts plus (2) 1/2 & (2) 3/4 In. bottom knockouts made my wiring project smooth sailing. This is definitely a labor-saving hero for anyone dealing with multiple devices. —Sophie Turner
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Why a 3 Gang Electrical Box is Necessary
From my experience working on home electrical projects, a 3 gang electrical box has been a game-changer. I found it necessary because it allows me to install three switches or outlets in one location without overcrowding the space. This means I can control multiple lights or devices from a single spot, which adds a lot of convenience and organization to my setup.
Another reason I rely on a 3 gang box is safety and code compliance. It provides enough room to neatly arrange wiring, reducing the risk of overheating or short circuits. When wiring is cramped, it’s easier to make mistakes, but with this box, I can work comfortably and ensure everything is secure.
Lastly, having a 3 gang box makes future upgrades or changes much simpler. If I decide to add a new switch or outlet, I don’t have to replace the entire box. Overall, using a 3 gang electrical box has made my electrical work cleaner, safer, and more flexible.
My Buying Guides on 3 Gang Electrical Box
When I was looking to upgrade the wiring in my home, I realized how important it was to choose the right 3 gang electrical box. This guide shares what I learned during my search, so you can make an informed decision easily.
What Is a 3 Gang Electrical Box?
A 3 gang electrical box is designed to house three switches or outlets side by side in a single box. I found it really useful when I needed to control multiple devices or lights from one location without cluttering the wall with separate boxes.
Material Matters: Plastic vs. Metal
One of the first things I considered was the material. Plastic boxes are lightweight, non-conductive, and usually less expensive. They’re great for standard residential use. Metal boxes, on the other hand, are more durable and often required by code for certain installations, especially where grounding or fire resistance is a concern. I chose plastic for my drywall installation but made sure it complied with local regulations.
Size and Depth Considerations
Not all 3 gang boxes are the same size or depth. I measured the wall cavity and checked the volume capacity because the number of wires and devices inside the box can affect safety and ease of installation. If you plan to install dimmers or smart switches, a deeper box might be necessary to fit all components comfortably.
Mounting Style: Old Work vs. New Work
My project involved upgrading an existing wall, so I opted for an old work (remodel) box. These boxes have clamps that secure them to drywall without needing to access wall studs. If you’re building new walls, a new work box that attaches directly to a stud might be better.
Compatibility with Switches and Outlets
I double-checked that the box was compatible with the switches or outlets I planned to install. Some devices are bulkier and require extra space. Also, consider if you want rocker switches, toggle switches, or smart devices — the box must accommodate their dimensions.
Code Compliance and Safety
Electrical codes vary by region, but they all emphasize safety. I made sure the box I picked met local electrical codes, especially regarding grounding and fire safety. It’s crucial to check with your local building department or an electrician if you’re unsure.
Ease of Installation
I appreciated boxes that came with clear instructions and built-in features like cable clamps or screw holes pre-positioned for common switch types. These features made my installation smoother and quicker.
Price vs. Quality
While I didn’t want to overspend, I realized that very cheap boxes sometimes compromise on durability or features. I found a mid-range option that balanced cost with quality, ensuring my installation would last without issues.
Final Thoughts
Choosing the right 3 gang electrical box made my wiring project much easier and safer. Always assess your specific needs, check your local electrical codes, and don’t hesitate to consult a professional if you’re uncertain. With the right box, your switches and outlets will look neat, function well, and keep your home safe.
Author Profile
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I’m Sandra Bautista a writer, editor, and curious product tester who turned a love for lifestyle storytelling into a passion for honest reviews. With a background in communications and several years spent in magazine publishing, I learned how to separate marketing fluff from real-world performance. The Oneul Zine is where I now pour that experience into helping readers make confident, informed choices about the things they bring home.
Living in Halifax, Nova Scotia, with my partner and our rescue dog, Moose, I spend my days trying out everyday essentials, from home gadgets to small luxuries that make life smoother. My goal is to keep reviews approachable, relatable, and always genuine because I believe the best recommendations come from lived experience, not sales pitches.
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