Can the voltage of the grounding protection wire be the same as that of the neutral wire?

The neutral wire (N-wire) and the grounding wire (PE wire) are two wires with different functions, which are completely different concepts in the standards of the electrical profession and the IEC. Although under normal conditions, the voltage of the meter to the earth is zero, and sometimes they are combined, but from theory and practice, they cannot be mixed. For example, in the case of the TN-C-S system, after the PE line and the N line are separated, no more contact is allowed, otherwise there will be more serious safety problems.

The neutral wire is a wire that can provide a "zero" level, which is generated by the neutral point of the power transformer connected to the earth. It is used to provide the same potential as the geodetic potential of the power supply system.

PE wire refers to a wire that connects exposed objects such as the shell of electrical equipment to the ground. It is used to keep the level of electrical equipment the same as that of the earth, so as to protect equipment and personnel in the event of leakage faults.

Theoretically, they both have a potential of 0

In this case, it may also be that your neutral wire and the grounding protection wire are not using the same grounding network, or that some of the ground wires you said are buried by the user privately.

However, when we are constructing, we usually use the same grounding network for grounding protection and the neutral line, that is, digging one outside the low-voltage room.

Meter-deep ditch, and then use 50 * 50 angle steel, take the meter length, sharpen the head into the ground, 5 meters away from one, play a 7 8, the specific drawings have instructions, and then the poles are welded together with flat steel, leading out of the ground.

The center point of the low-voltage side of the transformer is connected with the ground wire, and then from the center point of the transformer and a line comes out to make the zero line.

The above practices are just a few of the more practices I have come across.

It is not possible to have a ground-to-ground o-potential, but the zero line is different.

There are many cases where it is not the same.

In the low-voltage three-phase four-wire system neutral direct grounding line, the construction unit should ground the terminal of the zero trunk line and branch line of the distribution line during installation, and the zero trunk line should be grounded every 1 km.

In addition to repeated grounding at the distribution room or main distribution box, the protection neutral line must also be repeatedly grounded at the middle and end of the distribution line. For distribution lines with a grounding point of more than 50 meters, the neutral line at the access user should still be repeatedly grounded, and the repeated grounding resistance should not be greater than 10 ohms.

The protection zero line must be repeatedly grounded, (the rear end of the working zero line is not allowed to be repeatedly grounded) what you said is that this protection zero line is grounded at the beginning and middle end, and it is best to be grounded in the middle of the multi-resistant shoot to ensure that it is well grounded and safe.

The grounding wire of each grounding device shall be made of more than two conductors, and the grounding device shall be electrically connected at different points. Aluminum conductors shall not be used as grounding bodies or underground grounding wires. Angle steel, steel pipe or round steel should be used for the vertical ground, and rebar should not be used.

Summary. Hello, the grounding resistance value of each repeated grounding device at each place of the protection neutral line should not be greater than 10. In a power system where the working ground resistance value is allowed to reach 10, the equivalent resistance value of all repeated grounding should not be greater than 10.

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Neutral line and grounded PE

The resistance is 3.5 ohms, can the light be lit?

Hello, the grounding resistance value of the grounding device of each high parallel elimination grounding device at each place of the protection neutral line should not be greater than 10. In the power system where the working grounding resistance value is allowed to reach 10, the equivalent resistance value of all repeated grounding should not be greater than 10.

Do you mean that the light can be lit?

Hello, yes.

Hello dear, glad to answer for you. The grounding of the high-voltage line and the low-voltage neutral line may cause the flow of current, which in turn will cause an electric shock accident, especially when the high-voltage line is in working condition, contact with the high-voltage line will cause the current to pass through the body, causing electric shock. Therefore, under normal circumstances, it is not recommended that the high-voltage line be grounded with the low-voltage neutral line, and it must be operated in strict accordance with electrical safety standards and specifications.

At the same time, it should be noted that the high-voltage line and the low-voltage line should have sufficient separation distance to avoid electrical interruption and prevent the danger of hidden chain silver. If grounding is required, it should be inspected and operated by professionals to ensure the safety of the electrical system and avoid causing safety accidents.

Summary. Dear, the high-voltage line is grounded and the low-voltage neutral line will not be electrocuted.

Dear, the high-voltage line is grounded and the low-voltage neutral line will not be electrocuted.

Pro, 1, the ground wire alone is no electric cracking loss. 2. The ground wire, also known as the avoidance source Qinlei wire, is a wire used to introduce current into the earth; When electrical equipment leaks or the voltage is too high, the current enters the ground through the ground wire. 3. Ground wire (PE):

It is not used for working circuits, only as protective wires. When the leakage occurs in the equipment shell, the current will quickly flow into the ground, and even if the PE line has an open circuit, 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) The voltage difference between the live wire and the neutral line is maintained in a sinusoidal oscillating type.

The neutral line will not be electrocuted. Under normal circumstances, the neutral line is uncharged for the earth because it has no potential difference with the earth, that is, the nucleus trace is grounded because of the neutral point of the transformer. If the neutral point of the transformer is not grounded, the person will not be electrocuted if he touches any phase of the lighting electricity.

Does low-voltage grounding have an effect on high voltage?

In general, when a ground fault occurs in a low-voltage line, the protection action behavior has nothing to do with the high-voltage side.