Which material is considered Code-compliant for a radio antenna grounding electrode conductor?

The choice of bronze as a grounding electrode conductor for a radio antenna is considered Code-compliant primarily due to its excellent corrosion resistance properties and the reliable conductivity it offers. In grounding systems, materials need to be durable and capable of maintaining their electrical integrity over time, especially when exposed to varying environmental conditions.

Bronze is an alloy that typically contains copper and tin, along with other elements, which enhances its mechanical strength and corrosion resistance compared to other metals. It is less prone to electrolysis compared to pure copper when in contact with different metals, which minimizes the risk of degradation or failure in grounding systems.

While options like steel, copper, and aluminum also have specific applications in grounding, they come with different limitations. Steel is prone to rust unless adequately protected, aluminum can have issues with corrosion and conductivity over time, and copper, though widely used and highly conductive, may not always be the best choice for all environments, particularly when mixed with certain other metals. Thus, bronze stands out as a robust choice, ensuring long-lasting and efficient grounding for radio antennas.