What is the minimum cross-sectional area required for copper conductors used in lightning protection of watercraft?

The minimum cross-sectional area for copper conductors used in lightning protection of watercraft is stipulated to ensure that they can safely carry the high currents generated by a lightning strike. A cross-sectional area of 0.033 square inches is specifically designated as it provides a balance between conductivity and physical durability, reducing the risk of damage or failure during an electrical surge. This specification is derived from standards that consider the need to effectively dissipate the energy from lightning while minimizing resistance and potential overheating of the conductor.

The chosen answer reflects compliance with these safety and performance standards, making it suitable for lightning protection applications on watercraft. Conductors with an area less than this specified amount may not provide sufficient protection, risking structural integrity and safety. Thus, 0.033 in² is the correct requirement for adequate protection in these scenarios.