What is the role of circuit protective devices?

The role of circuit protective devices is primarily to protect against overloads and short circuits. These devices, which include circuit breakers and fuses, are essential for ensuring the safety and integrity of electrical systems.

When an overload occurs, such as when too many devices draw power from a circuit, circuit protective devices detect the excess current flow. If this overload is not interrupted, it can lead to overheating and potentially cause electrical fires or damage to equipment. Similarly, in the case of a short circuit, which happens when there is an unintended path for electrical current, these devices immediately cut off the flow of electricity to prevent damage.

By interrupting the flow of current when dangerous conditions arise, circuit protective devices safeguard both the wiring in the electrical system and the appliances connected to it, thus preventing costly repairs and enhancing overall safety.