Creating a wiring system is a responsible undertaking. At the same time, it is important to take into account all the requirements and recommendations of regulatory documents. The stable, safe operation of the energy system depends on the correct implementation of all stages of work.
There are a number of rules and considerations to be taken into account when laying cables in blocks. This process should be considered in detail before starting work.
Laying cables underground
Laying cables in cable blocks implies the creation of an electrical communications system underground. In this case, a project is preliminarily created, which provides for all the features of cable operation. Also, when designing, the degree of protection of conductors is calculated.
It should be noted that this is one of the most complex and costly methods of laying electrical networks. Trenches are dug with the help of mechanisms if the amount of earthwork is too large. In some cases, this step of laying the cable is done manually.
Underground, the cable can run in earthen trenches or special blocks, pipes. The first option has certain disadvantages. Although it is a less expensive way. However, there is a possibility that the cable will be damaged during line repairs or other adverse effects.
Benefits of cabling in blocks
Laying cables in blocks, pipes is one of the most reliable ways to create electrical communications underground. In this case, all wires run in special channels. The material from which such tunnels are made has certain characteristics. This avoids damage to the cable.
Special blocks avoid the negative impact of soil on electrical communications. Also, special materials of such tunnels protect the system from stray currents. In this case, the system will be operated for a long time and safely.
The disadvantage of this installation is its high cost. Also, if the layout is incorrect, the building length of the cable can be used irrationally. Also, in the process of maintaining communications underground, located in blocks, require a lot of labor.
Mounting Features
Quite often, when creating a network of electrical communications, a whole pipe block is used to lay the cable. A similar installation method may not be used everywhere. This is a rather costly approach. Most often, cable blocks are installed at the intersection of the route with railway tracks or when it is impossible to create a different type of system.
Also quite often the presented technique is used when laying electrical communications in the ground with aggressive chemicals. Without the creation of special protection, the cable insulation can be damaged over time. Also, the presented approach will protect the wire from stray currents.
Most often, special reinforced concrete panels are used for such installation. They can have 2-3 channels. The length of the block is standard 6 m. Additional elements may have a shorter length. It is 1-3 m. Special asbestos-cement or ceramic pipes can be used as wiring blocks.
Cable Blocks
Laying cables in blocks is made in accordance with certain requirements. Each block provides up to 10% of the channels for the reserve. There should not be less than one. The depth to which the blocks are laid must correspond to the conditions of the area.
To prevent condensate from collecting inside the tunnels, they are laid under a slope with an orientation towards the wells. The distance between the wells is determined by the terrain, as well as the peculiarity of the route itself. This will ensure the normal pulling of the cable, the creation of couplings.
A water collector is set up at the bottom of the canal. This is a recess that is closed with a metal grill. This allows you to divert ground, storm flows from the cable. Before laying communications, the blocks are cleaned with a cable. With winch cylinder and ruffbeing dragged through channels.
Cable laying
Laying cables in blocks is a rather complicated procedure. It is important not to damage the wire sheath. Using a special material, the cable is attached to the cable. This reduces the possibility of line damage. A drum is installed at the well, on which the wire is wound.
A special socket is mounted on the block pipe, and a gutter is mounted on the well neck. These additional elements are made of steel. At a speed of 5 km / h or less, electrical communications are pulled into the block. It is important that you do not stop. Before the cable is pulled into the pipe, it is lubricated with a special substance.
After tightening, the wire is cut off from the drum. In this case, you need to leave some margin of the cable. He will exit the block. This is necessary in order to subsequently make a coupling connection in this area and connect electricity to communications.
Having looked at how the cables are laid in blocks, you can appreciate the importance of meeting all the requirements for this process.
