What is the primary purpose of overcurrent protection?

The primary purpose of overcurrent protection is to protect conductors and equipment from excessive temperatures caused by overcurrent conditions. When the current flowing through electrical conductors exceeds their rated capacity, it can generate heat due to the resistance of the conductors. If this heat is not managed, it can lead to insulation breakdown, equipment failure, or even fire hazards. Overcurrent protection devices, such as circuit breakers and fuses, are designed to detect excess current flows and interrupt the circuit to prevent damage. This protective action helps maintain the integrity of electrical systems and enhances safety by minimizing the risk of thermal overloads.

The other options focus on different aspects of electrical systems. Increasing voltage is not related to overcurrent protection; rather, it pertains to power transmission and conversion. Ensuring continuity refers to guaranteeing an uninterrupted flow of current in a circuit, which is not directly the function of overcurrent protection. Disconnecting power from all circuits does not reflect the selective nature of overcurrent protection, which typically targets specific circuits experiencing excessive current rather than universally disconnecting power across the entire system.