Which category of meters is designed for residential current applications?

The category of meters designed for residential current applications generally falls into the second category, which is categorized as Category 2. This classification is specifically intended for use in environments where the energy measurement pertains to residential installation and similar applications, such as general electrical appliances and fixtures.

Category 2 meters are optimized for lower voltage and lower current readings, which are typical in residential settings. They are suitable for measuring the performance of household electrical systems without the additional complexities and higher rating requirements that higher categories might impose.

In contrast, the other categories typically cover more specialized or industrial applications. Category 1 is generally for measuring circuits with a limited scope, while Categories 3 and 4 are meant for higher voltage and higher current situations often found in industrial and commercial environments. Thus, understanding the context of these categories helps clarify why Category 2 specifically emphasizes residential use.