Which of the following materials is typically used for grounding conductors?

Copper is typically used for grounding conductors due to its excellent electrical conductivity, corrosion resistance, and ductility. These qualities ensure that copper provides a reliable and efficient path for fault currents, minimizing resistance and potential overheating during electrical faults.

Copper's high conductivity means that it can transfer electrical current effectively, which is vital for grounding applications to ensure personnel safety and equipment protection. Additionally, its resistance to corrosion allows it to maintain its conductive properties over time, even in harsh environmental conditions.

While other materials like aluminum can also be used for grounding applications, they generally have higher resistance compared to copper and may require larger cross-sectional areas to achieve the same conductivity, which can complicate installations. Steel, although it can be conductive and is sometimes used in grounding systems, primarily serves structural purposes and is more prone to corrosion unless treated properly. Plastic, on the other hand, is an insulator and is not suitable for grounding applications.