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

Grounding rods are essential components in telecommunications and electrical systems, providing a path for electrical faults to dissipate safely into the ground. Copper is the material most commonly used for grounding rods due to its excellent electrical conductivity, resistance to corrosion, and durability.

Copper's high conductivity ensures that any electrical discharge or surge can efficiently flow through the grounding system, minimizing the risk of damage to equipment and ensuring safety for personnel working on or near the telecom tower. Furthermore, copper is less prone to oxidation compared to other metals, which helps maintain a reliable grounding connection over time.

While aluminum can also be used in some capacities, it does not have the same level of conductivity as copper and is more susceptible to corrosion in certain environments. Plastic and wood are not suitable for grounding rods, as they do not conduct electricity and thus cannot fulfill the grounding function effectively. Hence, copper stands out as the ideal choice for ensuring reliable grounding in telecom installations.