Distribution boxes can be broadly categorized by their voltage level, application environment, and primary function. The two most fundamental distinctions are between Low-Voltage Distribution Boards and Medium-Voltage Distribution Enclosures, often referred to as Ring Main Units. Home / blog / Ultimate Guide to Distribution Boxes (DB Boxes): Types, Components, Applications, and How to Choose the Right One For procurement professionals, electrical contractors, and project managers, choosing the right Distribution Box (DB Box) is a critical decision that directly impacts. Main Distribution Boards control power for many circuits. They make things safer and are easy to upgrade. It helps organize, protect, and control electrical connections in residential, commercial, and industrial electrical systems. Distribution. What is a Distribution Box? A distribution box, or DB box, is a circuit breaker enclosure. Plus, we'll sprinkle in some practical tips to make sure you're not.