Module 26102‑20 – Safety for Electricians Practice Test

The purpose of circuit breakers in electrical systems is to protect circuits from overload and prevent fires. Circuit breakers are safety devices designed to automatically interrupt the flow of electrical current when they detect an overload or a fault, such as a short circuit. By breaking the circuit, they help to prevent overheating of wires and electrical components, which could lead to insulation failure and potentially start a fire.

This protective function is critical in ensuring the safety of both the electrical system and the environment in which it operates. While options related to increasing electrical flow, regulating voltage levels, and monitoring electrical equipment represent various aspects of electrical systems, they do not accurately describe the primary safety function that circuit breakers play in preventing dangerous conditions that could arise due to excessive current.