What is another term used for utilisation category?

The correct answer is fusing factor. Utilisation categories are classifications that define the operating conditions of electrical devices, particularly how they can be safely and effectively used under specific circumstances. The fusing factor refers to the relationship between the maximum current possible through a device and its rated fusing current, influencing how electrical equipment is used in various applications.

The fusing factor is an essential aspect of utilisation categories, as it helps in determining the safe and reliable operation of electrical equipment by ensuring that they can handle fault conditions without unnecessary damage or hazards.

Current capacity is a measure of how much electrical current a device can handle, but it is not synonymous with utilisation category. Efficiency factor relates to how effectively a device converts input energy to output energy but does not define its operational classification. Voltage rating indicates the maximum voltage a device can handle but does not encompass the broader concept of utilisation categories.