At construction of the house at the dacha the scheme of power supply "phase zero" is most often used. If you use only electric devices of household purpose, you have enough this scheme of power supply. And for safety make grounding, thereby having protected themselves and the relatives from defeat with current. Especially as in owner-occupied dwelling or at the dacha it is very simple to make it.
Instruction
1. More simply to understand operation principle of grounding which you have to make at the dacha it is necessary to know that electric current has property as ordinary water, flow there where the smallest resistance. Therefore it is necessary to make so that in case of electric device insulation fault, at touch to its body the current would not go through the living person. For this purpose its resistance has to be higher, than resistance of the grounding contour to which this device is attached. If the principle is clear, it is easy to execute the grounding device for the scheme of household power supply "phase zero".
2. Conditionally separate all work into two parts: 1. Internal device of the electrical circuitry of connection of household appliances with obligatory availability of earth wire. 2. The external device of the grounding contour. For interior wiring use the three-wire scheme: phase – zero – earth wire. It means that all electric sockets, connections of electric devices have to be provided with connection according to the aforesaid scheme. Bring earth wire of the scheme of power supply of the house to board of electromanagement and connect to external office of grounding which becomes separately.
3. It is for this purpose better not to save money and not to use as the natural ground wire of pile, support, etc. It is necessary to make the separate grounding contour. On frost depth, and it is about 2-2.5 m, hammer metal rods in number of 3 pieces. As rods it is possible to use any metal section with a section more than 1.5 quarter see. Arrange them on tops of equilateral triangle with the party of 1.5 m. Connect grounding rods among themselves metal strip (section more than 50 sq. mm) by means of welding.
4. Stretch the grounding contour received thus (it is possible to use the same metal strip) to the house and connect to earth wire on electric board. This connection has to be executed by means of threaded fastening. Connection in the way of twist is strictly forbidden.