What is Overcurrent?

• A. Decreases Current
• B. Excess Current Resulting From Either a Short Circuit or an Overload
• C. No Current
• D. Current That Only Flows Through Resistors

Answer: (B)

Overcurrent is when the current in a circuit exceeds what the wiring, components, or protection devices are designed to carry. This typically happens in two ways: a short circuit creates a low-resistance path that allows a large surge of current, and an overload draws more current than the circuit can safely handle. The description that mentions excess current caused by either a short circuit or an overload captures both of these common fault conditions, which is precisely what overcurrent refers to. Protective devices like fuses and breakers trip when this happens to prevent damage. The other ideas—current decreasing, no current, or current that only flows through resistors—do not describe a situation of excessive current, so they don’t fit the concept of overcurrent.