What Are The Differences Between The Three Levels Of Distribution Boxes?

The first-level Powbinet serves as the power introduction and aggregation point, introducing three-phase electricity, neutral wire and ground wire from the transformer or main power supply, and is responsible for trunk distribution and overall protection. It is usually located near the power supply and equipped with main busbar and metering equipment; the second-level distribution box is separated from the first-level distribution box and is used for distribution to floors or areas. It is responsible for regional load protection and branch circuit breaking; the tertiary distribution box (or switch box) is close to specific electrical equipment, providing independent protection and control for the final circuit, facilitating individual equipment maintenance and saving wires.