Which device is most commonly used to prevent electrical overload?

The circuit breaker is the most commonly used device to prevent electrical overload because it automatically interrupts the flow of electricity when it detects a fault, such as a short circuit or overload conditions. By doing this, it protects the wiring and connected devices from the potential damage caused by overheating or fires that can occur during an overload situation.

Circuit breakers can be reset after they trip, making them convenient and cost-effective for ongoing electrical protection. They come in various ratings designed to protect circuits based on their specific current-carrying capacity. This adaptability allows for effective safeguarding of the electrical system within both residential and commercial environments.

In contrast, while a fuse box does provide overload protection, it relies on fuse elements that must be replaced once blown, making it less user-friendly than circuit breakers. Surge protectors are designed primarily to protect against voltage spikes rather than overload conditions. Wire gauge relates to the physical size of the wire used in a circuit, which influences its capacity to carry electrical current safely, but it does not actively prevent overload situations.