A power surge is a sudden and unexpected rise in voltage that is above the designated level in the flow of electricity. While a standard household electrical line carries 120 volts, surges can exceed this amount, potentially causing damage to electronics and appliances. These surges can be brief but may have lasting effects on the lifespan and functionality of electrical devices within the home.

A power surge can occur as a result of several things. External factors, such as lightning strikes, can send a significant amount of electrical charge through the power lines and into the home's electrical system, leading to power surges. Similarly, changes in electricity flow from the utility company or downed power lines can also trigger power surges and damage the electrical appliances in the home.

Internally, major appliances like air conditioners, refrigerators, and even photocopiers can create sudden demands for electricity. When these appliances cycle on and off, they can disrupt the steady voltage flow, leading to power surges within the home. Additionally, faulty wiring, outdated electrical systems, and improper use of electrical equipment can also cause power surges, leading to damage to the appliances and electrical devices in the home.