What is the purpose of installing an overcurrent device in an electrical installation?

The primary purpose of installing an overcurrent device, such as a circuit breaker or fuse, in an electrical installation is to prevent electrical fires. Overcurrent devices are designed to detect excessive current flow that can occur due to overload conditions or short circuits. When the current exceeds the predetermined safe level, the device interrupts the circuit to protect the wiring, appliances, and the overall electrical system. This interruption helps mitigate the risk of overheating and potential fire hazards, ensuring the safety of the installation and its users.

While increasing voltage levels, regulating power distribution, and controlling electromagnetic interference are important aspects of electrical systems, they do not relate directly to the function of overcurrent devices. The effectiveness of an overcurrent device fundamentally lies in its ability to safeguard against dangerous current levels, making fire prevention its primary and essential function.