Purpose of installing the neutral line of the distribution box

The neutral wire in an electrical system provides a return path for current back to the power source. It is the critical interface where the utility's power is divided into individual branch circuits that feed the lights, outlets, and appliances. The neutral line refers to the part of the distribution grid that returns the power that left the transmission lines through a hot line or phase line to do work on an electrical load. At the same time, a ground wire, which is usually a plain copper wire or occasionally, one with green insulation, is also connected to the neutral bus bar. Though a breaker box wiring neutral or ground is connected. The neutral wire is the one that allows the current to return and serves as the return conductor of the current that circulates through single-phase circuits. [pdf]