Various events can lead to a power surge. While we often attribute power surges to external phenomena, such as lightning strikes, other culprits exist. Lightning is, in fact, one of the most frequent causes of power surges, but many of them are often homegrown. Large appliances, such as refrigerators, air conditioners, and heating systems, can inadvertently induce power surges when they cycle on and off. This cycling can strain the electrical system momentarily.

Similarly, faulty or aged wiring, unexpected power interruptions, and the subsequent return of electrical supply can generate power surges. Beyond the household, broader electrical infrastructure plays a part. Disruptions in the local power grid, activities like grid switching, equipment malfunctions, or even maintenance work can cause notable spikes in your electrical supply.