The main job of a surge protector system is to protect electronic devices from “surges.” A power surge is an increase in voltage significantly above the designated level in a flow of electricity. In normal household and office wiring in the United States, the standard voltage is 120 volts. If the voltage rises above 120 volts, there is a problem, and a surge protector helps to prevent that problem from destroying your electronics.
A surge protector works by channeling the extra voltage into the outlet’s grounding wire, preventing it from flowing through the electronic devices while at the same time allowing the normal voltage to continue along its path. Electrical surges can damage computer equipment by burning its wires or gradually over time wearing down the device’s internal components and even wipe out any saved data. Surge protectors can also protect telephone and cable lines as these also carry electric current.