Which of the following sets of faults is associated with electrical system malfunctions?

• A. Open circuit, shorted circuit, and low power
• B. Ground fault, arc flash, and overheating
• C. Insufficient grounding, overload, and short circuit
• D. Intermittent connection, loose wiring, and corrosion

Answer: (A)

In electrical systems, faults are conditions that directly interrupt or distort current flow. Open circuit is a break in the path, so no current can reach the load. Short circuit creates an unintended, very low-resistance path, causing excessive current. These two are quintessential fault conditions that cause malfunctions.

The third item, low power, describes a consequence of the fault—when the circuit is open or the path is poor, the load doesn’t receive the expected power. So this set centers on core fault conditions that produce malfunctions, with low power signaling the resulting problem.

Other options mix hazards (arc flash), symptoms or hazards (overheating), or maintenance/condition issues (intermittent connections, corrosion) with faults, making them lessdirectly representative of faults that cause malfunctions.