What is meant by the term 'Overloaded' (current) as it pertains to circuits or feeders?

• A. The circuit has more current flowing compared to its rating or ampacity
• B. The circuit has less current than its rating
• C. The circuit is properly rated
• D. The conductor is oversized for the load

Answer: (A)

Overloaded current means the amount of current flowing through a circuit or feeder exceeds what the conductor and its protective devices are designed to carry safely. Each conductor and protection device has an ampacity or rating that limits continuous operation. When the actual load pulls more current than that rating, the conductor can heat up too much, risking insulation damage or fire. So, an overloaded circuit is one with more current than its rating or ampacity allows, requiring protection to interrupt the current to prevent damage.

If current were less than the rating, the circuit would be underloaded. If the circuit were properly rated, it would be operating within limits and not overheated. An oversized conductor might be able to carry more current safely, but that alone isn’t what “overloaded” means.