A 2 way distribution board has space for just two protective devices, controlling two circuits. Distribution boards (DB), also known as consumer units, fuse boxes or breaker panel, are essential components in electrical installations that distribute electrical power from a main supply to various circuits throughout a building. But with some simple math and planning (don't worry, we'll walk through it!), you can design a system that works smoothly even when you're running all the gadgets. Each circuit gives power to a certain area or equipment. These diagrams show where each circuit breaker, switch, and wire is placed.