Table of contents:
- 1 Selection and preparation of grounding
- 2 Arrangement of the grounding bus
- 3 videos
To date, a whole range of special measures has been developed, providing reliable protection of the user against defeat electric current in everyday life, which allowed to make the process itself operating electrical equipment more secure.
The activities of this class should include training grounding known to most private homeowners under the name “ground loop”, which usually consists of the following structural elements:
- grounding device (grounding);
- set of grounding conductors;
- special grounding bus.
In the article we will talk about how to properly mount grounding in a private house with your own hands, we show the schemes, photos and video instructions.
Grounding selection and preparation
When organizing a grounding system in a suburban home, you can use as a ground electrode one of the following metal structures of natural origin:
- any reinforced concrete piles buried in the ground;
- metal pipes located on the surface of the earth or rails;
- other metal elements of building structures, buried in the ground.
In the event that near the house nothing like this can be found succeeds – you have to do the grounding preparation by yourself.
To make this ground element you will need prepare three steel electrodes 1.2 meters long, which subsequently welded together so that in the result of these operations is a triangle forms.
(When choosing as the electrodes segments of the steel pipe diameter must be at least 30 millimeters).
Circuit diagram In case of application electrodes of a different profile, the cross-sectional area of the elements should not be less than 150 mm2, and the length of the segments themselves – at least 2 meters. Before placing such a structure on the ground, you should prepare a place for her in advance by digging three ditches deep half a meter (in the form of a triangle with sides approximately 1.2 in length meter). Then in the corners of the resulting figure with a small sledgehammers should score three previously cooked and good pointed on one side of the electrode. For connection driven electrodes between each other, strips of steel with a cross section of at least 50 mm2. All parts of the resulting structure at the joints securely welded (or articulated using bolted connections).
At the end of these procedures, you will need to roll steel a strip of the section selected for the ground electrode to the point of the intended input grounding bus into the house (it is recommended to bring it closer to control cabinet and weld a small bolt at its end size).
Next, using a copper wire with a cross section of 6 mm2, passed through a hole in the wall and mounted on this bolt, you need to connect the forwarded bus to the main ground bus (GZSh) placed on a distribution board. Hence the protective grounding can be distributed throughout the premises of the home (in the composition of the working electrical wiring).
Arrangement of the grounding bus
To correctly resolve the issue of how to do it right grounding you have to perform the operation of the so-called “splitting” of the PEN conductor, which is part of the cable, from which is powered by your house.
To get a separate ground bus, this wire must be divided into protective and working conductors (PE and N respectively)
Such splitting can be organized with the help of what is already familiar to us. main ground bus.
On this bus in addition to the PEN conductor (wound on switchboard from the air line or from the underground cable) the previously made grounding conductor is also supplied, connected by bolting to the grounding bus.
Grounding circuit devices
Due to the presence of such grounding (which is essentially re) you can artificially arrange the wiring separately zero bus and zero working conductor for all consumers directly from the main ground bus. In this case, the phase wire (L) gets divorced with them.
Note that PUEs include special requirements, concerning arrangement on the consumer side, the so-called re-grounding. They apply to industry industrial networks, the inclusion of loads in which circuit with a grounded neutral. This connection method guarantees the operation of the entire protective grounding system even in the event of a break in the PEN conductor.
In this case, one should take into account the fact that in urban apartments to organize the splitting of the PEN conductor due to re-grounding you will not succeed.
A few words about the installation of grounding and grounding bus: