What is an arc flash, and why is it dangerous?

An arc flash is defined as an energy release that occurs when an electrical fault causes a high-temperature discharge through the air. This phenomenon can generate temperatures exceeding 35,000 degrees Fahrenheit, which is significantly hotter than the surface of the sun. The high temperatures produced during an arc flash can lead to severe burns, ignite clothing, and cause damage to electrical equipment.

Furthermore, the sudden release of energy can create a powerful blast, resulting in physical injuries from the force of the explosion, flying debris, and even hearing loss due to loud noise. This makes it crucial for individuals working with electrical systems to fully understand the risks associated with arc flashes and to adhere to safety procedures and protective measures designed to mitigate these dangers.

Given its definition and the associated risks, the characterization of an arc flash as a severe and hazardous electrical event highlights its significant dangers compared to other less critical electrical phenomena.