What is the multiplier used to calculate the fuse for a capacitor?

The multiplier used to calculate the fuse for a capacitor is 1.5 times the reactive current. This value is significant because it accounts for the inrush current that a capacitor may experience when it is energized. Capacitors can draw a considerable amount of current initially, which can exceed their normal operating conditions. By using 1.5 times the reactive current, it provides a safety margin to ensure that the fuse can handle these transient currents without blowing unnecessarily.

This approach takes into account the nature of capacitive loads, which can create conditions that require a fuse with a higher rating than the steady-state reactive current. It's essential for maintaining the longevity and reliability of the electrical system, ensuring that fuses protect the equipment effectively without causing interruptions due to nuisance tripping under normal inrush conditions.