What is the primary purpose of grounding in electrical systems?

The primary purpose of grounding in electrical systems is to provide a safe path for fault currents. In the event of a fault, such as a short circuit or equipment failure, grounding allows excessive current to flow safely to the ground instead of through people or sensitive equipment. This helps to prevent electrical shocks and reduces the risk of fire hazards by directing stray voltages away from where they could cause harm.

Grounding also stabilizes voltage levels and ensures that electrical systems operate safely and efficiently. By having a low-resistance path to the ground, it helps to protect both personnel and equipment from unexpected electrical surges. The other choices focus on aspects that aren't the primary reason for grounding; for instance, increasing power supply and improving performance are more related to system efficiency rather than safety, while reducing electromagnetic interference involves different methods, such as filtering and shielding.