NEIEP Generator Maintenance and Repair (440) Practice Test 2026 - Free Practice Questions and Study Guide

Arc flash generates extremely high heat in the arc channel, so the temperatures involved are far beyond ordinary flames. In practical safety training, a common approximate maximum is about 5,000°F, which illustrates how intense the hazard is and why full PPE and safe work practices are essential. The extreme heat can cause severe burns in a fraction of a second and drives the radiant and blast effects you must protect against. Therefore, the value that matches this commonly cited figure is five thousand degrees Fahrenheit.