A 4 way distribution board is designed to handle up to four separate circuits, with each circuit capable of powering one or more outlets within a building. Today, electrical systems are essential for homes and industries. What is the function of a Distribution Box? A distribution box can also be called a distribution board or a. A distribution box, also known as a power distribution box or electrical distribution box, is used to distribute electrical power safely to multiple circuits. By managing circuits individually, it prevents overloads and keeps your electrical setup running smoothly.