Creating a posting system is a critical undertaking. It is important to consider all the requirements and recommendations of regulatory documents. Stable, safe operation of the energy system depends on the correct implementation of all stages of work.
There are a number of rules and features to consider when laying cables in blocks . This process should be considered in detail before starting work.
Cable routing underground
Laying cables in cable blocks involves the creation of an electrical communications system underground. In this case, a project is preliminarily created in which all the features of cable operation are provided. When designing, the degree of protection of the conductors is also calculated.
It should be noted that this is one of the most complex and costly methods of laying electrical networks. Digging trenches using mechanisms if the volume of excavation is too large. In some cases, this cable routing step is performed manually.
Under the ground, the cable can pass in earthen trenches or special blocks, pipes. The first option has certain disadvantages. Although this is a less costly way. However, there is a possibility that the cable will be damaged during the repair of the line or other adverse effects.
Benefits of laying cables in blocks
Laying cables in blocks, pipes is one of the most reliable ways to create electrical communications underground. In this case, all the wires pass through special channels. The material from which these tunnels are made differs in certain characteristics. This avoids damage to the cable.
Special blocks allow avoiding 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, with improper planning, the construction length of the cable can be used irrationally. Also, in the process of servicing communications underground, located in blocks, require a lot of labor.
Mounting Features
Quite often, when creating an electrical communications network, a whole pipe block is used to lay the cable. A similar installation method may not apply everywhere. This is a fairly costly approach. Most often, cable blocks are installed at the intersection of the route with the railway tracks or, if 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 special protection, cable insulation can be damaged over time. Also, the presented approach will protect the wire from stray currents.
Most often, for such an installation, special reinforced concrete panels are used. They can have 2-3 channels. The length of the block is standard 6 m. The additional elements may have a shorter length. It is 1-3 m. Asbestos-cement or ceramic pipes can be used as blocks for wiring .
Cable blocks
The laying of cables in the blocks is carried out in accordance with certain requirements. Each block provides up to 10% of the channels for the reserve. They should not be less than one. The depth at which the blocks are stacked must match the conditions of the area.
To prevent condensation from gathering inside the tunnels, they are laid down on a slope with orientation towards the wells. The distance between the wells is determined by the topography, as well as the feature of the track itself. This will ensure a normal cable pull, the creation of couplings.
At the bottom of the canal, a water tank is arranged. This is a recess that closes 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. Using a winch, the cylinder and the brush are pulled through the channels.
Cabling
Laying cables in blocks is a rather complicated procedure. It is important not to damage the braid of wires. Using a special material, the cable is attached to the cable. This reduces the chance of line damage. At the well, a drum is mounted on which a wire is wound.
A special bell is mounted on the block pipe, and a chute is installed on the neck of the well. These additional elements are made of steel. At a speed of 5 km / h or less, electrical communications extend into the unit. It is important not to make stops. 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 a certain supply of cable. He will exit the block. This is necessary in order to subsequently make a coupling connection on this section and connect the electricity to the communications.
Having considered how to lay cables in blocks, you can evaluate the importance of fulfilling all the requirements for this process.