Which of the following is considered a type of lightning bonding conductor?

The correct choice refers to conductors made from specific materials and sizes that provide effective pathways for lightning current. In lightning protection systems, bonding conductors are essential because they ensure that different components of a system are electrically interconnected, helping to reduce the risk of lightning-induced damage by enabling a safe path for the lightning discharge.

The option that includes both 10-gauge aluminum and 14-gauge copper signifies a combination of different materials and appropriate sizes that meet many of the standard criteria for lightning bonding conductors. Aluminum and copper are commonly used because they possess excellent conductivity while being lightweight and corrosion-resistant.

The specific sizes mentioned—10-gauge aluminum and 14-gauge copper—are likely to fall within acceptable ranges for effective bonding in a lightning protection system, allowing for sufficient conductivity and mechanical strength to handle potential lightning currents.

In contrast, the other choices may either not fulfill the material requirements or might not be of a sufficient size to safely carry lightning currents, making them less suitable for use as bonding conductors in lightning protection applications.