This connection, known as system bonding, is accomplished by installing a main bonding jumper (MBJ) between the neutral bus bar and the panel enclosure or the grounding bus bar. Your breaker box wiring includes three main wire types: black hot wires carry electricity to outlets, white neutral wires return unused power, and green ground wires prevent electrocution. Ground faults occur when a hot wire touches a ground wire or metal box, creating a dangerous surge that trips. πIn this video, we will show you how to do household distribution box wiring step by step. This tutorial is very helpful for beginners and electricians who want to understand the comp. What is Distribution Board? Distribution board. Confusion often arises when connecting the neutral and ground conductors within a breaker box, as their proper handling depends entirely on the panel's location within the electrical system. These two conductors serve fundamentally different safety functions, even though they may sometimes connect. Above is the simplest electrical wiring system for the Fans, Bulbs and outlets.