Mains power refers to the standard electrical power supplied by utility companies to homes, businesses, and other buildings via the national or local electrical grid. In cybersecurity, mains power is relevant because many security systems, network devices, and data centers rely on a continuous power supply to function correctly. Power interruptions or fluctuations can disrupt operations, cause data loss, or even damage equipment. Attackers may exploit vulnerabilities related to mains power, such as cutting power to disable security systems or using power surges to damage hardware. Organizations often use uninterruptible power supplies (UPS) and backup generators to mitigate these risks.