The neutral live wire refers specifically to: the power supply line for civilian electricity. The AC power supply voltage of the city power is 220 volts (V) (different countries are different, China is 220V). It includes a neutral wire [N] and a live wire [L].
In order to make alternating current have a very convenient power conversion function, power transmission is usually in the form of three-phase four-wire. The three heads of the three-phase power are called phase wires, and the three tails of the three-phase power are connected together. The neutral line is also called the "zero line". The reason why it is called the neutral line is that no current flows through the neutral line at the moment of three-phase balance. Furthermore, it is directly or indirectly connected to the earth, and the voltage difference with the earth is close to zero.
The earth is a good conductor, and the ground wire is connected to the earth by a short circuit through a deeply buried electrode. The mains power is transmitted in a three-phase manner and has a neutral wire. When the three phases are balanced, the current of the neutral wire is zero, commonly known as the "neutral wire". Another feature of the neutral wire is that it is in total distribution with the ground wire in the system. The electrical input is shorted and the voltage difference is close to zero. The three phase lines of three-phase electricity and the neutral line have a voltage of 220, which can cause electric shock to people. It is commonly known as the "live wire".
In electrical engineering, the alternating voltage connected to the mains line is 220 volts (volts for short, symbol is V). There are two lines in the line. One of the lines with zero current is called The "neutral wire" and the other wire are called live wires. In electrical engineering, it is usually called the neutral live wire or one zero one fire.
The circuit switch at home usually cuts off the live wire and is equipped with a leakage protector to prevent personal electric shock accidents.
Under normal circumstances, the ground wire will not leak electricity, and the common ones are: two-hole and three-hole sockets. Under normal circumstances: among the two holes, the left hole is connected to the neutral line, and the right hole is connected to the live wire. In a three-hole socket, the upper hole is connected to the ground wire, the left hole is the neutral wire, and the right hole is the live wire.
The live wire is the power wire that carries electricity in the circuit.
The neutral line is mainly used in the working circuit and leads to the main line from the neutral point of the transformer to ground. (You can use a test pen to determine which wire is the live wire).
Red is generally used in mainland China to represent the L (LIVE) line, which is the live line; blue represents the N (NEUTRAL) line, which is the neutral line; yellow and green (commonly known as flower lines) represent the ground wire (Line E).