What is the most common type of conduit used in residential wiring?

The most common type of conduit used in residential wiring is PVC conduit. This choice is favored primarily due to its lightweight nature, ease of installation, and resistance to corrosion and moisture, making it suitable for various environments typically found in residential settings.

PVC conduit is non-metallic, making it an excellent option for areas where electrical installations may encounter moisture, such as underground or in damp locations. Its flexibility during installation allows for easier maneuvering around obstacles and adapting to various home layouts. Additionally, it does not require as many fittings as metal conduits, which simplifies the installation process.

While other conduit types, such as rigid metal conduit, flexible metal conduit, and electrical metallic tubing (EMT), each have their specific applications and advantages, they are not as commonly used in residential applications as PVC. Rigid metal conduit, for instance, is more suited for industrial environments due to its durability and strength, while EMT is often used in commercial applications where aesthetics and a lighter weight than rigid conduit are desired. Flexible metal conduit is typically employed in circumstances where movement or vibration is an issue, such as in motor connections, rather than general residential wiring.