This ultimate guide explains what a distribution box does, its internal components, common types, real-world applications, and how to select the right DB Box for your project. A distribution box, also known as a power distribution box or electrical distribution box, is used to distribute electrical power safely to multiple circuits. Today, electrical systems are essential for homes and industries. Plus, we'll sprinkle in some practical tips to make sure you're not. A distribution boxes is an essential device that manages the safe and efficient flow of electrical power throughout different areas of a building or facility. Its primary function is to organize incoming power into subsidiary circuits, each safeguarded by a fuse.