An overload occurs when a conductor is operated in what condition?

An overload occurs when a conductor operates in excess of its current rating. Each conductor has a specified maximum current that it can safely carry based on its material, size, and insulation type. When the current exceeds this maximum limit, the conductor heats up beyond its designed capacity, which can lead to wire insulation damage, potential fire hazards, or conductor failure.

While operating a conductor for a prolonged period can amplify the issues associated with an overload, the defining factor for identifying an overload condition is exceeding its specified current rating. Conditions such as short circuits can also lead to excessive current flow, but they are categorized as fault conditions, rather than overloads. Understanding these distinctions is crucial for safe electrical system design and maintenance.