Which of the following does NOT result from a poor power factor?

A poor power factor primarily affects the efficiency of electric power usage in a system. When the power factor is low, it means that more current is required to deliver the same amount of usable power (also called real power), leading to several consequences.

Increased conductor sizes occur when the current demand rises due to a poor power factor. Larger conductors are necessary to handle the increased load without overheating or experiencing significant voltage drops.

Heat damage to insulation connects to the increased current flow as well. Higher current can generate excessive heat, which can damage the insulation of wires and other components over time, leading to failures.

Reduced useful power available is also a direct consequence of a poor power factor. With inefficiencies in power delivery, a greater portion of the power is reactive (not doing useful work), resulting in less real power being available for actual use.

In contrast, blown fuses are typically a result of overload conditions caused by excessive current flow. While a poor power factor can lead to higher currents, it is not an immediate outcome of having a low power factor itself, as blown fuses often occur due to a sudden surge or an overload situation, rather than a sustained period of inefficient power usage.