5th Class Power Engineering Practice Exam 2025 - Free Power Engineer Practice Questions and Study Guide

Moisture significantly reduces the resistivity of human skin, allowing electrical current to flow more easily through the body. When the skin is dry, it acts as an insulator, but when wet, it can become a conductor, increasing the potential for dangerous currents to pass through the body.

Research indicates that moisture can increase the amount of current flowing through the body by as much as 100 times compared to when the skin is dry. This drastic increase is crucial to understand regarding electrical safety. The implications of such a change highlight the need for careful consideration of environmental conditions when working with electrical systems.

In practice, this means that ensuring dry conditions and avoiding contact with water when working near electrical equipment are essential safety measures. Knowledge of how moisture affects body resistance is vital for power engineers and technicians, as it underlines the importance of adhering to safety protocols to prevent electrical accidents.