Which term describes a hazardous electrical event characterized by a high-energy arc between conductors?

• A. Arc flash
• B. Ground fault
• C. Electrical shock
• D. Short circuit

Answer: (A)

Arc flash is the hazardous event where an electric arc forms between conductors (or from a conductor to ground), releasing a burst of energy as heat, light, and pressure. This intense energy can cause severe burns, ignite materials, and create a dangerous blast and flying debris. It’s distinct from a ground fault, which is about current taking an unintended path to ground and usually trips protective devices; from electrical shock, which is injury caused by current flowing through the body; and from a short circuit, which is a low-impedance fault that drives high current but isn’t defined by an arc event itself. So, the high-energy arc between conductors is best described as an arc flash.