why is neutral wire.explain plz
Any electrical circuit must have at least 2 wires for household service. These can be a hot leg and a neutral, or they can be two hot leads. This is typical for a split-phase 240/120 volt service. The neutral wire is the center tap of the transformer winding supplying the split-phase service. The neutral connection point at the transformer is the center tap of the transformer winding. The household system will carry as much of the total load in the 240 volt wires as possible, limited by the actual configuration of the wiring. And the only current carried in the neutral from your circuit breaker panel to the transformer is the unbalanced portion of the total load. The neutral wire in individual circuits from the circuit breaker panel always carries the same current as does the hot leg wire. The neutral is needed for single circuit runs from the circuit breaker panel to the loads. If you have a perfectly balanced load on both hot legs, you would not need a neutral from the circuit breaker panel to the transformer winding. But perfectly balanced conditions are seldom seen in the average home.
For current to flow you need a complete circuit. The neutral point of the generator winding at the power station is connected to the ground or earth and the neutral point of the transformer in your local sub-station is connected to earth. Believe it or not this completes the circuit to allow the current to flow since the neutral connection in your house is connected to the local sub-station transformer neutral.
The neutral is held at ground, to give a path for the current to return. The ground is for safety.
you need the neutral to complete the circuit
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