A(n) ? is defined in the NEC as operation of equipment in excess of normal, full-load rating, or of a conductor in excess of rated ampacity that, when it persists for a sufficient length of time, would cause damage or dangerous overheating.

• A. Overload
• B. Fault
• C. Short Circuit
• D. Arcing Fault

Answer: (A)

Overload is defined in the NEC as operation of equipment beyond its normal full-load rating, or of a conductor beyond its rated ampacity, that if it lasts long enough would cause damage or dangerous overheating. This concept focuses on a sustained overcurrent relative to what the equipment is designed to carry, which creates the risk of overheating if allowed to continue. It’s not describing a fault path or a true fault condition; those involve abnormal conduction paths or arcs. A short circuit is a severe fault with a near-direct, low-impedance path that causes a huge surge, while an arcing fault is a fault where an electric arc carries current and can generate heat and fire. Therefore, the situation described is an overload.