












⚡ Power your projects with weatherproof precision!
The SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box offers a spacious 16 cubic inch capacity with five 1/2-inch knockouts, crafted from powder-coated die-cast metal for superior corrosion resistance. Rated NEMA 3R and UL/CSA certified, it ensures safe, reliable use in wet locations. Designed for easy mounting with included hardware and a pre-installed ground screw, this white outlet box combines durability, versatility, and professional-grade quality for all your electrical installation needs.











| ASIN | B00C3YD6HU |
| Assembled Diameter | 5.5 Inches |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #39,157 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #79 in Electrical Boxes |
| Brand | Sigma Engineered Solutions |
| Capacity | 16 Cubic Inches |
| Color | White |
| Customer Reviews | 4.7 4.7 out of 5 stars (1,730) |
| Cutting Diameter | 5.5 Inches |
| Date First Available | March 27, 2013 |
| Finish | Powder Coated |
| Finish Type | Powder Coated |
| Global Trade Identification Number | 00031857643850 |
| Included Components | Sigma Engineered Solutions |
| Installation Type | Screw-In |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 8 ounces |
| Item model number | b5b4dfb4-09e3-40da-b716-f01bcab2f649 |
| Manufacturer | Sigma Electric |
| Material | Metal |
| Number Of Holes | 5 |
| Part Number | 143854WH |
| Product Dimensions | 4.2"D x 5.5"W x 2.26"H |
| Size | 1 Count (Pack of 1) |
| Specification Met | Csa, Nema 3r, Ul |
| Style | Compact |
| Thickness | N/A Inches |
| UPC | 031857643850 |
| Warranty Description | Warranty |
M**C
Great value for money better then hardware store options
Heavy metal great quality gave everything needed for installation. My light fixture fit perfectly and I like the white matches. Would recommend to anyway way better then hardware store options. I used it on wood stud but I’m sure it’s versatile.
K**M
Solid build, Easy install, lots of options.
Didn't realize the flood lights I ordered weren't going to mount on a deck without a box, so I quickly settled on these. Pros: * Looks great, feels very sturdy. * No sharp edges, & White is way better looking than bare metal. * Great size, with plenty of room inside to store wires & wire-nuts. * Fit my fixture, & fits at least 2 fixture sizes, as there are 2 sets of screw sockets to choose from. * Easy to mount to outside wall, or deck. No need to cut a hole to recess it into. Yay! * Plenty of choices on how to feed the wire in, & out, if need be. 4 threaded side holes, & 1 Back hole, with 4 little screw in plugs to keep critters & the weather out, when not in use. Cons: * None for me, but if you need it to go into a recessed hole, this is probably not the one to choose. The mounting tabs will surely get in your way. You may think there's not much difference between one electrical box and another, but there really is. This one is very nice compared to all others I've used. (a Lot). That coating is way nicer to your hands, too. No sharp edges on mine. Thanks designers. : )
J**D
lasting years, exterior application
This is a quality electrical appliance box. I mounted this on a semi protected exterior wall. I have a flood light installed on it. It has been there for 2 years, at least, and the light is still working like new. The light fixture fits well on the box.
B**S
Well-made metal round boxes — clean finish and solid fit
These Sigma Electric 1/2-inch 5-hole round boxes are solid, well-constructed metal boxes that work exactly as intended. The white finish is clean and even, with no sharp edges or defects, and the knockouts are placed well for flexible wiring configurations. The boxes feel sturdy and durable, suitable for typical residential or light commercial electrical applications. Threads and knockouts are clean, making installation straightforward, and the pack of two is convenient for small projects without overbuying. I’m giving four stars instead of five only because these are straightforward electrical boxes — nothing flashy, just reliable hardware that does the job. If you need dependable round boxes with multiple knockout options, these are a good choice.
H**I
Handy box
Very handy plus made good
H**4
Well made
Well made. Works as expected. Replaced a 30 year old junction box of the same type. The old one was starting to wear. Mainly the paint was chipping away. Looked ugly. I also needed to replace a broken led spotlight fixture. I did both at the same time. This junction box was a direct bolt on. No mods needed. I didn't use the supplied screws. I had to use longer outdoor rated course thread type screws for my application. I wouldn't leave a negative review for the hardware issue because every house and every application is going to be different. They supply a basic set of screws as a courtesy. Use your judgement to decide what screws are needed to install.
S**R
Nice Box
Well made and looks good.
J**S
Great for outdoor motion lighting
Great box that mounts directly on house, it comes with plugs for holes that aren’t used making it weather proof, perfect fit for motion lights, I installed box and light in 15 minutes.
S**N
Well built and easy to fit for outdoor use. Was prefect fit to mount a Reolink Elite Floodlight camera too after other junction boxes weren't suitable. Requires a suitable gland for any cables, but supplies blanking plugs for unused entry points
B**D
High quality, perfect for outdoor use.
T**K
…for creating a surface mounted damp proof wired 120V motion activated LED floodlight.
S**R
This box has no cover, no screws to attach it to anything and the bolts they provided are not painted, also are to short! After finding the right size and painting them I still needed to find screws to attach it to the wall.
Trustpilot
2 weeks ago
2 weeks ago