What type of wiring is most commonly used in residential applications?

Non-metallic sheathed cable, commonly referred to as NM cable, is the most widely used type of wiring in residential applications due to its various practical benefits. NM cable consists of two or more insulated conductors and a bare ground wire, all encased in a flexible plastic sheath. This construction makes it lightweight and easy to handle for electricians during installation, enabling them to route it through walls, ceilings, and floors with relative ease.

The use of NM cable is also favored because it is cost-effective compared to other wiring options, providing a balance between performance and affordability. Additionally, NM cable is well suited for dry, indoor applications, which are prevalent in residential structures.

Other options, such as metal conduits, are usually employed in situations requiring additional protection from physical damage or exposure to extreme conditions, making them less common in standard residential settings. Ductwork wiring is not a recognized electrical wiring type and thus does not apply to residential wiring. Underground feeder cable is specifically designed for outdoor applications and underground installations, making it inappropriate for typical residential wiring within the home.

Overall, NM cable’s versatility, ease of installation, and cost efficiency contribute to its popularity in residential electrical work.