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Anonymous users2024-02-11The neutral line is the line drawn out of the neutral point of the transformer, and the phase wire forms a loop to supply power to the electrical equipment. With voltage, electrons flow through the wires to form an electric current. It's the same as the principle that water flows from high to low.
Water does work in the process of flowing, and electricity does work in the process of flowing. When an electric current passes through a wire with a thin wire diameter and high resistance, a traffic jam may occur, resulting in heat generation. The tungsten filament of electric lamps can withstand high temperatures, and the tungsten filament emits light when it is hot.
AC power cords are divided into neutral and live wires. The neutral line is always equal to the potential of the ground (but this does not mean that the potential of the ground is necessarily low), and the live wire maintains a sinusoidal oscillating voltage difference between the neutral wire. Because there is zero potential difference between man and the earth in the natural state, under normal circumstances, people will not be shocked when they touch the neutral line.
This is the reason why you can protect people from electric shock by connecting the shell to the neutral wire with an electrical appliance (connecting it to zero).
Grounding is divided into: working grounding (in order to make the electrical equipment work normally), protective grounding (like a triangle plug), lightning protection grounding (lightning rod), grounding is to only connect a metal object or a certain point in the electrical circuit on the ground to the earth through a conductor, so that the object and the earth maintain equipotential. Prevent electric shock after human touch.
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Anonymous users2024-02-10The neutral wire cannot be grounded, and the ground wire can be grounded. Neutral line (N): Mainly used in the working circuit, the main line is drawn out after the neutral point of the transformer is grounded.
Ground Wire (PE): Not used in working circuits, only as a protective wire. Using the absolute "0" voltage of the earth, when the equipment shell leaks, the current will quickly flow into the ground, and even if there is an open circuit in the PE line, it will flow into the ground from the nearby grounding body.
After grounding from the neutral point of the transformer, the main line is drawn out and the grounding is repeated every 20-30 meters).
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Anonymous users2024-02-09The neutral wire cannot be grounded, and the ground wire can be grounded.
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Anonymous users2024-02-08The neutral line does not electrify people when there is no load, but it is not a grounding point, so when the live wire and the neutral wire are connected, the neutral wire and the live wire form a loop, of course, the electric person, the neutral wire is not the ground wire, it cannot be sure that there is no voltage.
The difference between the live wire and the neutral wire is that they have different voltages to the ground: the live wire has a voltage of 220v to the ground and the neutral wire has a voltage of 0 to the ground
The voltage of the live wire to ground is equal to 220V; The voltage of the neutral line to the ground is equal to zero (which itself is connected to the earth). So when one part of the person hits the line of fire and the other part is standing on the ground, and the voltage between these two parts of the person is equal to 220V, there is a risk of electric shock.
On the contrary, even if a person uses his hand to grasp the zero line, if the person is standing on the ground, because the voltage of the zero line to the ground is equal to zero, the voltage between the various parts of the human body is equal to zero, and the person is not in danger of electric shock.
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