When should a circuit be checked for overload conditions?

A circuit should be checked for overload conditions when a device is frequently tripping the breaker because this is a strong indicator that the circuit may be drawing more current than it is designed to handle. Overloading can occur when the combined load of the devices connected to the circuit exceeds its amperage rating, leading to overheating, potential damage to the circuit, and safety hazards such as fires. Frequent tripping is the circuit's protective mechanism working to prevent these dangerous situations.

Other conditions, while they may indicate possible issues, do not specifically indicate an overload scenario as directly as frequent breaker tripping does. For example, physical damage to a receptacle may show problems with connections or short circuits but does not inherently suggest an overload unless connected to a symptom of pulling excess current. Similarly, using a single plug for multiple devices can lead to overload situations, but if it's within the circuit's rating, it wouldn't necessarily cause immediate danger. Lastly, a recently installed circuit may be functioning properly or improperly for reasons not related to overload, such as installation errors or equipment compatibility. Thus, the primary focus on frequent breaker tripping highlights the circuit's response to potential overload conditions best.