--- product_id: 38538422 title: "SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes" brand: "sigma engineered solutions" price: "£16.26" currency: GBP in_stock: true reviews_count: 13 url: https://www.desertcart.co.uk/products/38538422-sigma-engineered-solutions-143854-round-metal-electrical-outlet-box-weatherproof store_origin: GB region: United Kingdom --- # 16 cu. in. capacity NEMA 3R rated for wet locations Powder coated corrosion resistance SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes **Brand:** sigma engineered solutions **Price:** £16.26 **Availability:** ✅ In Stock ## Summary > ⚡ Power your projects with weatherproof precision! ## Quick Answers - **What is this?** SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes by sigma engineered solutions - **How much does it cost?** £16.26 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/38538422-sigma-engineered-solutions-143854-round-metal-electrical-outlet-box-weatherproof) ## Best For - sigma engineered solutions enthusiasts ## Why This Product - Trusted sigma engineered solutions brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Weatherproof & Durable:** Powder-coated die-cast metal built to withstand harsh outdoor conditions - • **Effortless Installation:** Includes mounting lugs, closure plugs, and pre-installed ground screw for quick setup - • **Robust 16 cu. in. Capacity:** Spacious interior to effortlessly manage wiring and wire-nuts - • **Versatile 5 Knockout Design:** Five 1/2-inch holes for flexible conduit and fixture mounting options - • **Certified Safety & Reliability:** UL and CSA listed, ensuring trusted performance in wet environments ## Overview 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. ## Description Sigma Engineered Solutions weatherproof round box provides a junction for conduits and can be used to mount lampholders and lighting systems. The rugged, die-cast construction prevents moisture penetration making the box suitable for wet, damp or dry locations. The box is powder coated for corrosion resistance and features a ground screw for secure installation. Boxes include hardware, closure plugs and pre-installed ground screw. Product is UL and CSA listed. Review: 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. Review: 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. ## Features - Features five 1/2-in knockouts and 16 cu. in. capacity - Fits standard 4-in round weatherproof box covers (with 4.1885-in diameter) - Provide a junction for conduits or can be used to mount lampholders and lighting systems - Die-cast construction and powder coated for corrosion resistance and includes a pre-installed ground screw and closure plugs - Product is UL and CSA listed, suitable for wet locations and NEMA 3R rated ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00C3YD6HU | | Best Sellers Rank | #78,832 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #177 in Electrical Boxes | | Brand | Sigma Engineered Solutions | | Brand Name | Sigma Engineered Solutions | | Capacity | 16 Cubic Inches | | Color | White | | Customer Reviews | 4.7 out of 5 stars 1,795 Reviews | | Finish Type | Powder Coated | | Global Trade Identification Number | 00031857643850 | | Included Components | Sigma Engineered Solutions | | Installation Type | Screw-In | | Item Dimensions D x W x H | 2.26"D x 5.5"W x 4.2"H | | Item Type Name | Sigma Engineered Solutions, White Sigma Electric 143854WH 1/2-Inch 5 Hole Round Box | | Item Weight | 8 ounces | | Manufacturer | Sigma Engineered Solutions | | Material | Metal | | Model Number | b5b4dfb4-09e3-40da-b716-f01bcab2f649 | | Part Number | 143854WH | | Product Dimensions | 2.26"D x 5.5"W x 4.2"H | | Specification Met | Csa, Nema 3r, Ul | | Style | Compact | | UPC | 031857643850 | | Unit Count | 1.0 Count | | Warranty Description | Warranty | ## Product Details - **Brand:** Sigma Engineered Solutions - **Color:** White - **Material:** Metal - **Product Dimensions:** 4.2"D x 5.5"W x 2.26"H - **Style:** Compact ## Images ![SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes - Image 1](https://m.media-amazon.com/images/I/61yLHRT151L.jpg) ![SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes - Image 2](https://m.media-amazon.com/images/I/71cZ1EshuJL.jpg) ![SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes - Image 3](https://m.media-amazon.com/images/I/71fiksjteHL.jpg) ![SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes - Image 4](https://m.media-amazon.com/images/I/61NsO6teZcL.jpg) ![SIGMA ENGINEERED SOLUTIONS 143854 Round Metal Electrical Outlet Box, Weatherproof, Easy Mount, White, (5) 1/2-Inch Holes - Image 5](https://m.media-amazon.com/images/I/61np3i+LF0L.jpg) ## Questions & Answers **Q: How many threaded plugs does it come with?** A: It has 5 holes, and 4 plugs. Basically they assume you will use at least one. **Q: How can it be 4.2 inches by 5.5 inches? That's not a circle. So, is it safe to assume that the 5.5 inch measurement includes the mounting tabs?** A: Yes ,that point would be the widest footprint when mounting this box 5.5" . That means that the space that this box would fit between two fixed objects is 5.5" **Q: Where is this made?** A: Mine shows that it is Made in India **Q: What is the depth of this box?** A: The inside depth is 2 1/2 inches ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great for outdoor motion lighting *by J***S on January 8, 2026* 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. ### ⭐⭐⭐⭐⭐ Great value for money better then hardware store options *by M***C on December 18, 2025* 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. ### ⭐⭐⭐⭐⭐ Sturdy and Reliable for DIY Projects *by D***D on July 16, 2024* I've been using this for my recent electrical DIY project, and it's been a solid choice. The material feels robust and dependable, which is exactly what I need when tackling home improvements. One thing I really like is how easy it is to work with. The five-hole design provides ample flexibility for different wiring configurations, making my task much simpler. It also has a clean, white finish that blends well with my home's interior, a small detail but one that adds a professional touch to the work. The only minor downside is that the paint can chip if you're not careful during installation. However, this is easily avoidable with a bit of caution. As someone who enjoys taking on DIY projects, I find this round box to be an excellent addition to my toolkit. It holds up well under various conditions and simplifies the wiring process significantly. ## Frequently Bought Together - Sigma Engineered Solutions, White Sigma Electric 143854WH 1/2-Inch 5 Hole Round Box - Ring Floodlight Cam Wired Plus with motion-activated 1080p HD video, Black (2021 release) - LUTEC 72W 7500LM LED Security Lights Motion Sensor Light Outdoor, 5000K Daylight, IP65 Waterproof, Dusk to Dawn, 3-Head Motion Detected Flood Light for Garage, Yard, Porch(White) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/38538422-sigma-engineered-solutions-143854-round-metal-electrical-outlet-box-weatherproof](https://www.desertcart.co.uk/products/38538422-sigma-engineered-solutions-143854-round-metal-electrical-outlet-box-weatherproof) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-30*