Grounding is a specially executed connection of those of the elements of equipment that are capable of conducting current and can be under voltage. This is included in the grounding ground, as well as the grounding conductor – for connecting with the grounding electrical device.
Grounding is performed to ensure the safety of personnel and protect life. Its task is to ensure that an electric current that is not corresponding to the norm with a small frequency and a large amplitude is assigned.
In addition, its task also includes the alignment of electrical potentials – there should not be a difference in those of the conductive parts of stationary equipment, which are simultaneously open for access, on third -party conductive parts, and elements of building structures that are made of metal are also included here.
Achieve this using a reliable connection of the data of the conducting parts with each other using conductors.
For any of the objects, protective grounding is mandatory. Requirements for it are determined by the norms in the relevant documents that are mandatory – for example, PUE or the National Electric American Code.
The grounding of a private house, the cottage is performed as a ring closed circuit (if grounding is calculated during construction, you can consider the ground ground). Have a circuit around the perimeter of the building – at a depth of one and a half meters.
Grounding as a system for a private house is assembled in the ground and fixed using special steel fasteners that are isolated by anti -corrosion material. After strengthening in the ground, the grounding ground is connected to a lightning receiver and current -wrap.
It is necessary to calculate grounding, given the entire set of components – metal corrosion, freezing of soil, etc. D. When calculating grounding, you need to use the following data: the specific resistance of the soil, the total resistance of the grounding holders.
In a private house, grounding can be arranged using natural grounding grounds – it can be water pipes laid in the ground, casing wells, all kinds of structures made of reinforced concrete and metal, in contact with the ground.
This work does not belong to the category of difficult to perform, but, despite this, the grounding of residential buildings or other structures must be performed by professionals.
Technological grounding is also called telecommunications or functional. It serves in order to provide equipment to the normal functioning and electromagnetic compatibility.
Such grounding is used to create protection against low -amplitude interference of high frequency, as well as align the potentials on the houses of devices or racks where it is placed. With it, you can also set the overall level of the counting of electrical signals. Such grounding does not apply to the obligatory – it is only recommended, and it is not necessary to arrange it at the facility.
It is important to properly organize protective grounding – first of all, this is a guarantee that the electric shock caused by negative manifestations will be allocated to the ground, and people and equipment will not suffer.
This is especially important when struck by zippers, which, with direct hit, can cause short -term throws of stresses, in which amplitude can reach tens or hundreds of kilovolts. A no less serious source of trouble can be malfunctions in electric networks. The voltage from the power wiring can get on the communication line, while the effect of this problem is quite limited by the exposure to.