Yes, a distribution box typically belongs to a power distribution room as part of the hierarchical power distribution system.

Role of a Distribution Box

A distribution box is an electrical enclosure that distributes power from a higher-level distribution cabinet to final circuits, such as lighting, sockets, and air conditioners. It provides overload, short-circuit, and leakage protection for connected circuits and equipment, and is usually compact and easy to maintain . Distribution boxes can be classified as primary, secondary, or tertiary, depending on their position in the distribution hierarchy .

Power Distribution Room

A power distribution room (or distribution room) is a dedicated indoor space that houses electrical equipment for managing and distributing electricity within a building or facility. It typically contains distribution cabinets, switchgear, transformers, and sometimes primary distribution boxes. The room is designed to support the weight, ventilation, and safety requirements of electrical equipment .

Hierarchical Relationship

• Primary distribution box: Usually located in the distribution room, it receives power from the transformer and distributes it to secondary distribution boxes .
• Secondary distribution box: Serves specific areas, such as floors or buildings, and may be located in smaller rooms or enclosures closer to the load.
• Tertiary distribution box: The final connection point for individual equipment or households, often installed near the end-user . In this hierarchy, the distribution box is an integral component of the power distribution system, and the primary distribution boxes are typically installed within the power distribution room, while secondary and tertiary boxes may be located elsewhere depending on the layout and load requirements.

Summary

A distribution box is part of the broader electrical distribution system and primary distribution boxes are generally housed in a power distribution room. This setup ensures centralized control, protection, and efficient distribution of electrical energy to downstream circuits and equipment .