Home distribution boxes typically handle single-phase power supplies and contain 6 to 24 circuits. They include standard circuit breakers for lighting, outlets, and major appliances like water heaters and air conditioning units. Your circuit count leads directly to the box size. Future solar panels or EV chargers won't require expensive upgrades. It has three categories: residential, commercial and industrial electrical distribution boxes, all of which play important roles in their respective electrical. The distribution box (DB box) helps safely and efficiently distribute electrical power.