Vanishing and ground: what is the difference, the technical requirements

Without electricity the life of modern man is much more complicated. In this case, in addition to convenience, should pay special attention to safety in the use household appliances. To this end, it provides protection against accidental electric shock grounding and vanishing. What is the difference between data protection methods we offer together disassembled.

Introduction - basic requirements for electrical safety

That during operation household appliances no difficulties, should adhere to certain rules:

1. Do not pull the plug out sockets the cord. It is removed, while holding firmly with your fingers to avoid electric shock.
2. Do not touch electrical switches with wet hands.
3. It should abandon the intentional use lamps more power than that stated by the manufacturer.
4. If signs of short circuit (spark or characteristic cod) start repairs possible only after disconnection appliance from the wall outlet.
5. Know the location of the machine, with which you can disconnect an apartment or house.
6. Strictly follow the manufacturer's recommendations on the operation and maintenance household appliances. If you specify that the instrument should not be left unattended, after turning it into a wall outlet, someone must always be near him.

What is the ground: the principle of operation and devices

If we talk about what is grounding, It is a special steel structure, by which electrical appliances are connected to the ground. Thanks to its presence can be reduced to a minimum charge that could get a man when you accidentally touch the equipmentUnder voltage. In case of accidental damage to the insulation current is due to the smaller resistance grounding of the "leaves" in the ground.

Attention! Important for devices with isolated neutral.

When ground stock artificially increased quantity emergency circuit current. With this actuation of the security device occurs at the moment when the voltage falls under the dead parts.

After the deal with the fact that a safety ground, offering to meet with the zeroing.

What is vanishing: the principle of operation and devices

This type of protection is important for the apartments, which are not provided by traditional ground, or performance does not meet modern requirements. What is vanishing? This system, elements of which are connected to the metal body or parts, non-conducting during normal operation.

The vanishing is connected to neutral. This design ensures that a short circuit occurs when an insulation fault and the output current to the device housing, because of which will work RCD and circuit breakers.

Attention! Using the protective earth and neutral, it is essential to install machines and RCD.

During operation, check the neutral position of the wires is a prerequisite. With a large current under stress, will all Appliances.

Vanishing and ground: what is the difference between these two methods of protection

From the definition of grounding and vanishing appreciated that both systems are designed to protect against electrical shock. However, to ensure sufficient level of security is necessary to understand in more detail to what is different from the ground vanishing. This will allow to determine the possible uses of each system and its features.

What is different from the ground vanishing?

Immediately it is worth noting that both systems are designed to ensure safe operation of electrical installations. The fundamental difference lies in the principle of operation and installation. When the voltage on the work surface grounding quickly withdraws the electric current in the ground, thus protecting humans.

Vanishing voltage decreases. It breaks the circuit path. protection method is selected depending on the kind of the plug electricalAs well as its location.

When the ground is used?

The scope of this method of protection is closely connected with the fact, which need grounding. It is used to prevent electric shock. Earthing can be natural or special design grounding circuit. The latter option is preferable.

In private homes the grounding system is combined with the lightning protection. However, experts recommend to mount the system separately, as by a lightning strike wiring can be dangerous, causing output appliances out of service.

When is vanishing?

Where to use protective earth and neutral? This is an appropriate option for the residential sector. In such an embodiment the industrial complex protection is only used in conjunction with the ground. Overvoltage higher than the permissible dangerous to humans and can cause shutdown equipment. Protective equipment in this case will be able to instantly de-energize the circuit path. If you plan to use equipmentWorking from the network 380, the use of zeroing is required.

The main technical requirements to the vanishing and Grounding

Location protective devices is determined at step wiring. In this case, be sure to take into account requirements for grounding and vanishing:

• If plant capacity is not more than 1000 W, and it has the earthed neutral conductor, vanishing necessarily provided;
• When using the transformer with a voltage of 380 V to only one energy consumer connected system;
• The plant with a capacity of more than 1000 watts produced neutral conductor grounded to provide effective protection in the event of breakdown voltage.

Attention! If the technique is used with a voltage of 1300 V, grounding and vanishing is performed without fail.

Earthing device - that is: it will be interesting to everyone

Earthing device - a system comprising directly earthing and ground conductors which are used to connect household appliances to earth. Grounding devices can be divided into the following types:

1. WorkingAllowing to ensure smooth operation equipment;
2. Protective. It ensures safe operation of the instrument;
3. lightning, allowing to take a bolt of lightning or a lightning rod in the spark gap.

Also ground can be divided into:

• artificial, manufactured specifically for the protection against voltage. It consists of metal rods and wires, pipes substandard type of steel parts. Experts recommend to choose steel strips or corners of at least 4 mm, rods with a diameter of 10 mm and a length of more than 10 m;
• Natural. Such metal structure originally manufactured for other purposes, but can be used for protection against voltage. Those who first encountered the concept of natural earth electrode, which is the definition of the term - it will be interesting. These include products made of reinforced concrete, pipelines, Siege tube. Exceptions are systems for transporting gas and the combustible liquid.

The symbol for the earthing device can determine its type. The first letter indicates:

• T - The power supply is connected directly to earth;
• I - the conductive parts are isolated from the ground.

The second character in the legend shows:

• T - open parts that are energized must be grounded, regardless of their relationship with the ground;
• N - exposed parts under voltage, protected from the power source through the neutral to earth.

Letters next to callout after a dash N, reflect the nature of the connection conductor arrangement and method:

• S - protection PE zero and N-operate single working conductor wires;
• FROM - protection formed by one wire.

The main methods of grounding devices

The design of the device may differ considerably. When choosing a suitable option should be taken into consideration, as the ground running. The system should not be afraid of the negative impact of the external environment. The selection can be made in favor of one of the following structures:

• Annular, when system elements are arranged around the house, forming a kind of ring;
• Fundamental. This type can be selected at the initial stage of construction, so his plan worked out most carefully, taking into account all the nuances. Items that will be attached collector metallic conductors should uphold the contours of erected buildings;
• Deep. The method is not subject to special requirements. However, when the device should be carefully tailored to suit the soil at a site to determine the optimal depth of occurrence of the electric wire. When performing work on their own, this type is most preferred, as an affordable and easy installation.

Related article:

will be discussed in this material on how to make grounded in a private house with his own hands. 220 - standard voltage in the network, and we discuss in detail how to do so that it does not cause harm to people or domestic appliances.

Advantages and disadvantages of vanishing in the apartment

This safety device is not enough to protect a person from electric shock. It is not as efficient as the ground, however, in spite of this vanishing in apartments used everywhere. Its installation allows you to take care of the timely interruption of particular circuit portion in which a short-circuit. For proper installation of protection should have some knowledge. This should be considered when carrying out independent work.

The disadvantages of vanishing include:

• low level of security in direct contact with live parts;
• the possibility of errors in electrical connectionWhich will lead to the fact that the appliance will be connected to the housing phase;
• in the case of a blown fuse a short-circuit does not happen a complete network outages;
• high risk of fire due to short-circuit currents, leakage currents or sparks generated during closure of the housing.

Having dealt with the fact that such grounding and vanishing, it will be easier to protect yourself and your family from accidental electric shock. Share in the comments, what method of protection to your home and why.