PSI Journeyman Online Practice Exam 2026 - Free Journeyman Practice Questions and Study Guide

Surge protectors are specifically designed to mitigate the risk of damage caused by voltage spikes, which can occur due to various factors such as lightning strikes, power surges from the electrical grid, or sudden changes in electrical load. When a voltage spike occurs, it can exceed the normal operating voltage of electronic devices, potentially leading to overheating, component failure, or complete destruction. Surge protectors work by redirecting excess voltage away from the devices plugged into them, typically using components like metal-oxide varistors (MOVs) which absorb and dissipate the extra energy, thereby protecting the connected equipment.

While power outages, short circuits, and static electricity can cause issues for electrical devices, they do not fall under the scenario that surge protectors are designed to address. Power outages typically disrupt the supply of electricity rather than introduce an excess voltage, short circuits are faults in the wiring that can create a dangerous situation but are not effectively mitigated by surge protectors, and static electricity involves different, lower voltage discharges that surge protectors are not intended to handle. Thus, surge protectors are specifically best suited for preventing damage from voltage spikes.