NM-B
2. The Dos and Don’ts of NM-B Wire
Okay, so you know what NM-B wire means. Great! Now, let’s talk about where you can actually use it. This is where things get a little more specific, and paying attention is key. Using the wrong type of wire for a particular application is like putting diesel in a gasoline engine — it’s just not going to end well.
NM-B wire is primarily designed for indoor, dry locations. Think interior walls, ceilings, and floors of your home or apartment. It’s perfect for wiring lights, outlets, switches, and pretty much anything else that requires electricity inside your living space. As long as it’s protected from moisture and physical damage, NM-B wire is generally a safe and reliable choice.
Now, for the “definitely not” list. Under no circumstances should you use NM-B wire outdoors, underground, or in wet locations. Think of it this way: NM-B wire hates water. It’s like a gremlin — get it wet, and bad things happen. Using NM-B in these environments can lead to electrical shorts, corrosion, and even fire. Seriously, don’t do it!
For outdoor applications, you’ll need a different type of wire specifically designed to withstand the elements, such as UF (Underground Feeder) cable. Similarly, for wet locations like bathrooms and kitchens, you might need to use conduit (a protective tube) to house the wiring. Always check your local electrical codes and, when in doubt, consult with a qualified electrician. They’ll be able to guide you on the appropriate type of wire for your specific project.