What is a common material used for electrical conduit in residential wiring?

Steel is commonly used for electrical conduit in residential wiring due to its durability and strength. It provides excellent protection for electrical wires from physical damage and is resistant to various environmental factors, such as moisture and corrosion when properly treated. Steel conduit also has the added benefit of being non-combustible, which enhances fire safety in residential settings.

In addition to providing structural integrity, steel conduit acts as a grounding path for electrical systems, which is an important safety feature. It can help mitigate electromagnetic interference, further improving the reliability of the electrical system.

Other materials like plastic, although lightweight and resistant to corrosion, may not offer the same level of physical protection or grounding capabilities. Wood is generally not used for conduits for electrical wiring due to its combustibility and susceptibility to decay. Aluminum, while lightweight and resistant to corrosion, may not provide the same level of strength and protection as steel.