What is the heat generated when current is interrupted called?

The heat generated when current is interrupted is referred to as heat of arcing. This phenomenon occurs when the electrical current is interrupted, causing a discharge of electricity that can generate high temperatures at the point of interruption. This heat is produced due to the electrical energy being converted into thermal energy during the quick breakdown of air or other materials around the electrical circuit.

In electrical systems, arcing can pose significant risks, as the extreme heat can lead to ignition of nearby combustible materials, making it a crucial factor to consider in fire safety inspections. The heat of arcing is particularly relevant in contexts such as circuit breakers and electrical panels, where electrical connections are frequently interrupted or re-established. Understanding this concept is essential for ensuring safe electrical practices and fire prevention measures.