A common material used for lightning bonding conductors is?

Aluminum is a commonly used material for lightning bonding conductors due to several advantageous properties. It is lightweight, which makes it easier to work with during installation, yet still maintains sufficient strength and conductivity for effective lightning protection systems. Additionally, aluminum has good corrosion resistance, which is important for outdoor applications where the conductor may be exposed to moisture and atmospheric elements. This reduces the risk of degradation over time, ensuring that the lightning bonding system remains functional and reliable.

Gold, while an excellent conductor, is not cost-effective for this application. Lead poses health and environmental concerns and is less effective than aluminum for conductivity in outdoor settings. Brass, while it has decent conductive properties, is typically not used for lightning protection due to its susceptibility to corrosion compared to aluminum. Therefore, aluminum stands out as the best choice for bonding conductors in lightning protection systems.