Build Daily

Engineering Systems

August 12, 2017 18:07

Laying power and low-voltage cables

Cabling PUE

The first thing to consider is the rules of electrical devices.Such conditions grasp hold of electric light houses, offices, buildings, lighting, external objects, settlements, territories, institutions, advertising light panels, light icon, illumination, etc.Option, which is valid for today does not include requests for the protection of electrical installations against short circuits, overvoltage, fire (GOST R 50571.17-2000), electromagnetic current action (GOST R 50571.20-2000).

The structure of electrical device regulations include the following items:

  1. General rules
  2. Sewerage electricity
  3. protection and automatic
  4. current distribution
  5. electric power installation
  6. lighting electrician
  7. Electrical installations Equipment

Laying cable lines for SAEin the design includes a number of items and sub-.112 from 2.3 to 2.3.133.

Laying power cables

process of pulling the power cable is made in the following sequence:

  • Securing drum
  • Raising it with a jacking
  • Opening the casing of the drum
  • Unrolling the gradual rotation of the drum and pulling the pad specified in the project.

Laying power wire most economical, if carried out in the trenches.To do this, use a wire, armored with steel strips and coated with insulation cable yarn.For one trench rate of up to 6 wires.The spacing between them should be from 100 to 250 mm.If by different groups of services, the space increases to 50 cm

Power cable

Mortgage depth is not less than 0.7 m, but when crossing the line -. 1 m. If you can not perform a gap, then put in the pipe.At the intersection with the engineering design, then put the mechanical protection.Simply put the tube in the cable.If there is a cable located in the territory before the building is, the side with him lay empty pipes for future communications.

There is another option - to lay the wires in the blocks.This, of course, is not the most economical way, but the units are composed of asbestos cement, ceramic pipes or concrete frames, that is doubly protected wire.

line that has more than six wires required to be installed in ducts.On top of the need to put the plate.If the gasket is building, then covered with sand.In the most-depth cable ducts or tunnels are on cable constructions.In tunnels pose an automatic fire extinguishing devices and reports the presence of smoke.To prevent entry of moisture into the tunnel drainage perform installation of mechanical machines.

Tunnels, where there is a lot of communication, is considered to be collectors.In tunnels, reservoirs, canals allowed to use unarmored cables.The distribution structures used wire with armored plated top.To reduce spontaneous fracture of metals and active heat transfer your dye in the black.The wires that cross reservoirs, placed in a tube buried in the ground.Ground wiring to make 20 pieces on wooden trestles.In a particularly severe environment, put on the sides of boxes teplokommunikatsy networks.

For detailed information on power routing, see the video on the next tab.

Laying Low voltage cables

to Regulation mount voltage network include:

  • Min space between a number of underlying low-current and power flow must be 0.5 m, but overlaying necessarily angle 90º
  • Prohibited strike strands Low voltage networkin the riser where the electric wires
  • forbidden to combine the wire.Use only whole winding wires
  • distribution box is required to be mounted on the wall, but not under the openings and not on them
  • sure to ground the bus or any copper conductor
  • all box and the blocks are filled with a maximum of half

include telephone, computer to low-current networks, television networks.

low voltage cables

To build such networks need different wiring depending on the destination.For example, a computer network requires the use of copper cables for telephone circuit wiring need 3 categories.
Where to build such a network:

  • Underground (cable ducts)
  • By Air (cable Tossing from building to building)
  • closed (in the trays)
  • cable tray installation

  • Open (without the risk of mechanical impact)

When broachingwire lines exclude the likelihood of risk of mechanical overload in the working procedure.Pave, in case of soil movements or deformation under the action of heat or light, with a mean spatial margin.The rooms do the wave way at the expense of cable trays for the slack.

PROHIBITED laid spare wiring length of the rings, are mindful of the induction.
cable, which is placed on a wall or other flat poverhnostyai horizontally, attach to the end points on the cable bends.Fixed with joints and rubber bands for non-armored species.

Laying horizontally on the wall with clamping collars

installation consists of two phases:

  1. Secure locking structure for cable
  2. Route and attach to taps Electrical

After removing the drum corps inspect its external coils.If they are damaged, they are cut, and the insulating sheath check voltage load.Paper insulation is considered to dryness.Upon such verification, put tight caps on the end.

Installation of low-voltage cables in the ceiling

Laying power and low-voltage cables

laying any cables going into these mounting options:

  1. Hidden
    • in brick and concrete;
    • The cardboard-gypsum facilities;
    • under the false flooring
  2. Open
    • in plastic cable ducts
    • Electric plastic;

Recommended Installation security systems and power cables for safety:

  1. Do not lay in one Stroebe no walls;
  2. use shielded wool or mechanical pipe;
  3. If possible, lay the cable on the opposite walls.
  4. When crossing to form an angle 90º
  5. distribution equipment placed away from the low-current cables.

The PUE of broaching parallel low-voltage electric cables and for 1985 in section 2, chapter, talking about a total ban on the joint lining raztochnyh cables.But if the trays and boxes are bordering vsploshnuyu septum, the lining can be made.
In other normative documents have clearly defined cases in which the gasket is completely prohibited.And this:

  • If the effect of one cable to the other switches norms;
  • If the possibility of damage to the current user;
  • If there is a likelihood of acoustic shock;
  • If there is a risk of false guidance signals;

consider more options for posting both hidden and open.So, concealed wiring in walls eliminates the possibility of further improvement or, for example, a change in electrical wiring, without destroying the wall structure, the only positive point is the duration of use and the general form of a wire in the wall.Hidden wiring in plasterboard partitions a low-cost and easy to incarnation, but the drywall is not so robust material such as concrete, over time it pours, and deformed, resulting in damage to the network.

Installation of cables for the raised floor

Raised used only with sexual hatches, this little hole in the floor for monitoring.But the use of these hatches is the list of cons:

  • Great price on short term work;
  • Disadvantages use
  • binding to the tables;
  • option of access to networks under him.

In general, the use of raised floor convenient solution for offices, a huge minus is the price.
transition to an open wiring.Wiring in plastic small channels suitable for transferring more jobs than to create new wiring.This is the budget option, but it will look respectively.Next open laying wires in plastic channels.

This is the best option, not to tear down walls, floors and other coatings at the same time does not depend on the building processes that take place at this time.Also a plus is the speed of implementation of channel locks.Also, it is worth noting that any repairs are made in such a channel easily and without causing much discomfort.

If you follow these recommendations, you can easily and quickly select the joint laying low current and power cables without any problems and costs.