What type of wire is commonly used for residential electricity?

Type NM (non-metallic) wire, often referred to as Romex, is the standard choice for residential electrical wiring. It consists of two or more insulated conductors and a bare ground wire, all housed in a non-metallic sheath. This wiring is favored for interior residential applications due to its flexibility, ease of installation, and protection against moisture and common household hazards.

NM wire is designed for dry locations, making it suitable for the majority of residential wiring projects within walls, ceilings, and floors. The non-metallic sheath provides ample protection against physical damage and electrical shocks, which is critical for ensuring the safety of the home’s electrical system.

In contrast, while Type UF wire is used for underground installations, it is not as commonly utilized throughout the interior of homes. Type TW is primarily insulation rated for use in dry locations and is not suitable for residential wiring to the extent NM is. Type SOW, being designed for heavy-duty applications, does not typically meet the average residential wiring needs, making NM the most practical and effective choice for general household electricity usage.