The neutral bus bar is a grounded metal bar found in the home’s breaker box which all neutral and grounding wires are connected to. In a home’s wiring, every circuit needs two wires, a hot wire and a neutral wire. The neutral wire is grounded for safety reasons. The neutral wire in a home must be white and the hot wire is either black or red.
The neutral busbar is where all the white or neutral wires are terminated and where the earth busbar and the safety ground wires are terminated. Both of these busbars are connected into the ground at some point. The neutral busbar itself is the common return path for all hot wires. Its common purpose is to create a substantial electrical current, not to serve as a structural part of the wiring system itself.
A professional home inspector can examine a home’s current electrical workings to determine they are up to code and working safely and efficiently to protect the home and the people living inside it.