Which type of grounding conductor is considered most effective for minimizing electrical hazards?

Copper is considered the most effective grounding conductor for minimizing electrical hazards due to its excellent electrical conductivity and resistance to corrosion. This means that copper can efficiently conduct fault currents to the ground, limiting the risk of shock and ensuring that circuit breakers and other safety devices operate as intended.

Additionally, copper has a higher tensile strength compared to other metals like aluminum or steel, which makes it more durable and able to withstand environmental stresses without breaking down. This durability enhances its long-term reliability in grounding applications, allowing it to maintain a robust connection over the lifespan of the electrical system.

While aluminum is also used in grounding applications, it has a higher resistance compared to copper and can oxidize, which can compromise its conductivity over time. Steel is generally not used as a grounding conductor due to its susceptibility to rust and lower conductivity. Plastic, being a non-conductor, cannot serve a grounding function at all. Thus, copper emerges as the preferred choice for effective grounding in electrical systems.