A circuit that is overloading is characterized by what condition?

An overloaded circuit is primarily characterized by frequent tripping of the breaker or fuse. This occurs because when the current flowing through the circuit exceeds its rated capacity, safety devices such as circuit breakers or fuses are designed to interrupt the flow of electricity to prevent damage to the wiring and connected equipment. The tripping action is a protective mechanism that indicates an overload condition, ensuring that equipment and wiring do not overheat, which could lead to potential electrical fires or equipment failure.

In contrast, continuous operation at rated load indicates that the circuit is functioning as designed without exceeding its capacity. Smooth operation with minimal fluctuations suggests stability in the electrical system, while consistent voltage readings would imply that the circuit is not experiencing any significant issues affecting performance. None of these conditions indicate that an overload is present; rather, they imply a normal functioning circuit. Hence, the frequent tripping of breakers or fuses is the definitive sign of an overloaded circuit.