What is a common type of conduit used in residential wiring?

Non-metallic sheathed cable (NM cable) is a common type of wiring method used in residential construction due to its ease of installation, flexibility, and cost-effectiveness. NM cable typically consists of two or more insulated conductors and a bare ground wire, all housed within a protective non-metallic jacket. This type of cable is suitable for use in dry locations and is often utilized for lighting and power circuits in homes.

The appeal of NM cable lies in its light weight and ease of handling, making it favorable for residential electricians. It is also less expensive than many conduit systems, which can contribute to overall lower labor and material costs during installation. The use of NM cable aligns with the residential wiring codes which allow its use in specific applications, making it a standard choice in modern home wiring practices.

In contrast, while PVC conduit, metal conduit, and flexible conduit all have their specific applications and benefits, they are often used in commercial settings or where certain conditions (like exposure to moisture or physical damage) necessitate their use. Therefore, for typical residential wiring projects, NM cable is the most common option.