The neutral is paired to each of the single phase load. The neutral prong is the wider of the two plugs.

Ground Neutral And Hot Wires Explained
What is the purpose of a neutral wire. The neutral is an insulated wire because it is part of the circuit which flows electrical current. The function of neutral wire in 3 phase 4 wire system is to serve as a return wire for general domestic supply system. Neutral is a circuit conductor that normally completes the circuit back to the source. The grounded electrode conductor. However the neutral wires purpose is to be part of the live path for electricity rather than to act as a safety guard if something goes wrong. Neutral is usually connected to ground earth at the main electrical panel street drop or meter and also at the final step down transformer of the supply.
The ground wire is also connected to the ground to prevent short circuits. The purpose of the neutral wire is to complete the 120volt ac circuit by providing the path back to the electrical panel where the neutral wire is connected and bonded to the earth ground. The purpose of the neutral wire is to complete the 120volt ac circuit by providing the path back to the electrical panel where the neutral wire is connected and bonded to the earth ground. For multiple panels the situation is more complex. In this article we will discuss the main function of neutral wire and the purpose of neutral wire in electrical circuit with a detail explanation. The potential of the neutral point can be very well understood from the following figure.
Basics electrical the main function and purpose of neutral wire in electrical circuit is to provide a return path for current in single phase supply. The neutral is an insulated wire because it is part of the circuit which flows electrical current. That is for simple single panel installations.