What does the phrase "arc flash" mean?

The phrase "arc flash" refers to a dangerous electrical explosion that can occur when an electrical current travels through the air. This phenomenon happens when a high-voltage electrical source creates a short circuit or fault condition, allowing the electrical energy to jump through the air between conductors or from a conductor to the ground. During this process, an enormous amount of energy is released, resulting in intense heat, pressure waves, and blinding light. This can lead to severe injuries, fires, and damage to equipment.

Understanding arc flash is essential for safety in any electrical environment, as it emphasizes the importance of proper electrical safety practices and the need for protective equipment. The risk associated with it is significant, making knowledge and preventive measures critical for anyone working with or around electrical systems.