Which of the following factors is NOT involved in determining bonding distance requirements?

The weight of the metal bodies is not a determining factor in bonding distance requirements. Instead, bonding distance considerations primarily focus on how to effectively manage the path of lightning energy to ensure safety and minimize the risk of electrical shock or equipment damage during a lightning strike.

Factors such as the flashover medium, which refers to the surrounding environment and materials that can influence the path of electrical discharge, play a significant role in defining safe distances. Additionally, the distance between grounded metal bodies is critical because it affects the risk of side flash or conduction of electrical energy between structures. The number and location of down conductors also influence how well the lightning protection system can distribute energy to the ground safely.

In contrast, while the weight of metal bodies may be important for structural integrity or load considerations, it does not impact the bonding distance necessary for the safe dissipation of lightning energy.