Which condition does not affect contact resistance during an electric shock incident?

Contact resistance is a critical factor in determining the severity of an electric shock. It refers to the resistance encountered at the interface where the electrical current enters the body. Environmental conditions, duration of contact, and the overall condition of contact (like being wet or dry) can significantly alter the level of resistance encountered.

While elevation above sea level does affect a variety of physical and environmental parameters, it does not have a direct impact on the resistance at the points of contact during an electric shock. Factors such as temperature, humidity, and surface conditions (wet or dry) in the immediate environment play a more prominent role in affecting contact resistance. The duration of contact influences how long the current has to flow through the resistance, and body contact condition (such as the skin's condition) can either increase or decrease the resistance based on whether the skin is intact or compromised.

Thus, elevation above sea level does not significantly influence contact resistance in the context of an electric shock incident, making it the correct answer.