When it comes to safe, cost-effective, and code-compliant wiring, non-metallic boxes are becoming the clear choice for many electrical professionals and DIYers alike. These enclosures are designed for versatility and simplicity, making them an essential component in both residential and light commercial construction. But what exactly makes them so popular? Let’s explore the advantages of non-metallic boxes and why they’re an ideal solution for modern electrical installations.
Lightweight and Easy to Install
Non-metallic (NM) boxes are typically made of high-strength thermoplastic materials. This lightweight construction makes them far easier to handle than traditional metal boxes. Electricians appreciate the reduced physical strain, particularly when installing dozens (or even hundreds) of boxes in large projects.
Additionally, these boxes often feature built-in mounting options such as flanges, nails, or brackets that simplify attachment to studs or joists. This speeds up installation times and reduces labor costs—a major advantage in today’s competitive building market.
Corrosion Resistance
Unlike metal boxes, non-metallic enclosures don’t rust. This makes them especially well-suited to damp or humid environments such as basements, crawl spaces, garages, and even certain commercial settings. Over time, rust can compromise the structural integrity of a metal box, potentially leading to safety hazards and costly repairs. NM boxes, on the other hand, maintain their strength and safety profile even in challenging conditions.
Code Compliance and Safety
Non-metallic boxes are listed and tested to meet UL standards, providing peace of mind that they’re approved for safe use in electrical installations. Because they’re non-conductive, they reduce the risk of accidental shorts or stray current, adding an extra layer of safety for installers and occupants alike.
Many local electrical codes allow or even prefer non-metallic boxes in residential settings. They also pair well with non-metallic sheathed cable (NM cable), which is widely used in modern construction.
Cost-Effective Solutions
For budget-conscious builders and homeowners, non-metallic boxes often cost less than comparable metal options. This price difference becomes substantial when multiplied across an entire housing development or remodel. Lower material costs, combined with easier, faster installation, make NM boxes a smart choice economically.
Variety of Applications
Today’s non-metallic boxes aren’t just basic single-gang switch boxes. They come in a wide range of sizes, shapes, and designs—including old-work (remodel) boxes, new-work boxes, fan-rated boxes, and multi-gang configurations. This versatility means you can standardize on NM boxes for nearly any indoor wiring scenario.
Allied Moulded: Leading the Way
At Allied Moulded, we offer an extensive selection of high-quality non-metallic electrical boxes and enclosures engineered for superior performance. Whether you’re a residential contractor looking to streamline installations or an inspector seeking code-compliant solutions, our products deliver the durability, safety, and ease of use you demand.
When you choose non-metallic boxes, you’re not just saving money or installation time—you’re investing in a safer, more reliable electrical system for years to come.