Pipes

Pipe electrotechnical PVC. Varieties and features of electrical pipes

February 7, 2020

An electrical pipe is a product, used to protect wiring and network cables from various mechanical influences. exept this, in the event of a short circuit in the electrical network, such products prevent fire, since the material has special properties. Previously, these functions were performed by metal pipes, however, with the advent of plastic they almost ceased to be used.

Protective pipe for wiring is used when laying networks in houses for various purposes

Advantages of PVC pipes over metal

Assortment of plastic products, which are used for various purposes, including for protection of wires, incredibly wide. Electrical steel pipes can not compete with cheap and easy to install plastic counterparts. Consider the main benefits, which are possessed by electrotechnical pipes from PVC (polyvinyl chloride):

  • long service life (to 50 years);
  • resistance to corrosion and aggressive environments;
  • moisture resistance;
  • possibility of installation underground;
  • light weight;
  • plasticity (if necessary, the plastic part can be bent at a certain angle);
  • ease of installation;
  • cheapness.

pay attention! If water gets into the metal pipe, and then froze there, then it can lead to the expansion of the walls of the products with their subsequent destruction. PVC plastic parts cannot be damaged in this way, which increases their service life.

Features of electrical pipes made of polyvinyl chloride

Electrical pipe made of PVC is made using the method of continuous extrusion. Such products are used for wiring in buildings for various purposes: residential, production, and also at underground installation of electric cables. They reliably protect wires from mechanical influences, moisture on them, etc.. D.

PVC ducts can be laid underground

In modern buildings, it has become popular to openly have an electrical pipeline. This allows in case of an unforeseen situation to quickly diagnose and repair communication. Also PVC details are suitable for the hidden laying in brick or concrete walls. You can place the wiring on the floor, walls and ceilings. Any strict requirements for work surfaces, on which such a system will be installed, does not exist. You can even install it on wood. They have good heat resistance (from - 20 ° C to + 90 ° C), therefore can be used in unheated rooms and on the street.

exept this, polyvinyl chloride burns quite poorly, therefore, even if a short circuit occurs in the mains, the fire will not happen. This is a very important quality, on which human life may depend. According to statistics 40% fires occur precisely due to a short circuit in the wiring.

Smooth electrical PVC pipes are mounted on flat areas of the room. The size of such products, usually, does not exceed 2 m. If necessary, you can independently divide the plastic product into the desired segments. Joining of separate details among themselves occurs at the expense of special connecting elements, which are sold there, where and pipes.

Types of electrical pipes made of polyvinyl chloride

Technical PVC pipes are distinguished by cross-sectional size and length. The most popular length, which is available in most cases - 3 m. The diameter of the products varies from 16 to 63 mm. exept this, such products have a diverse appearance.

Wiring pipes are available in different diameters, minimum cross-sectional size - 16 mm

To date, the range of such pipes is very wide. The following varieties can be found on the market:

  • corrugated pipes;
  • smooth hard;
  • flexible corrugated pipes, including with reinforced walls (due to their flexibility can protect the cable wire of various moving equipment, and the reinforced layer increases their technical characteristics);
  • double-walled - used for installation in water or soil, when you need to run a cable with a large cross section. In the installation of fiber-optic networks use technical HDPE PE pipe for cable laying.

Smooth rigid PVC products

There are two types of such pipes:

  1. Equipped with a probe, which helps to stretch the cable.
  2. No probe.

The characteristics of smooth rigid pipes are presented in table №1.

Table 1

Two, mm Wall thickness, mm Quantity in the package, PC
63 2,0 — 2,4 15
50 2,0 — 2,4 30
40 1,8 — 2,15 60
32 1,4 — 1,75 90
25 1,3 — 1,6 120
20 1,2 — 1,5 150
16 1,1 — 1,4 150

Use such products as an additional protective structure for wiring.

Advice! Smooth rigid pipes, usually, set so, so that they do not attract attention: ??along the floor or ceiling. Such products have a relatively small cross section. If desired, they can be used as an element of decor.

Smooth pipes can be laid in an open way, they can complement the interior of the room

HDPE technical pipe for cable laying

The production of such polyethylene is under low pressure. That is why it is called in the abbreviation "PND" (low pressure polyethylene). One of the main advantages, which has polyethylene - low cost. This is due to the fact, that recyclables are used to create it. The people nicknamed such a product "HDPE technique". Depending on the wall thickness of the HDPE pipe, used, for cable laying are divided into three main types:

  1. SL - medium-light.
  2. C - medium.
  3. T - heavy.

exept this, HDPE pipes are divided by wall type:

  • smooth-walled;
  • corrugated.

And they also happen:

  • single-layer;
  • two-layer.

Smooth-walled single-layer products are made of high-strength polyethylene. The cross section of such products can be from 8 to 250 mm. The outer shell in two-layer HDPE products is intended for that, to protect the inner wall, in which the wiring takes place.

Except, for electrical purposes such parts are used for:

  • water transportation;
  • cable installation underground;
  • different economic needs.

To protect the wiring can be used and smooth technical pipe HDPE

In some cases, PE pipes are equipped with a special broach, which accelerates the installation of the structure several times. HDPE electrical pipe is resistant to aggressive chemicals, however, mechanical actions can damage it.

Corrugated PVC pipes for power grids

Electrical corrugated products have a ribbed surface and also perform the function of protecting electrical cables. These parts can be mounted open, and hidden. The main feature of corrugated PVC pipes is that, that due to their design they can be bent at any angle. exept this, the low weight of the product allows you to install it in those cases, when installation of rigid models is inexpedient (example, in a false ceiling).

There are corrugations:

  • L - light;
  • T - heavy.

And:

  • without stretching;
  • with a broach.

Corrugated parts have been used successfully for over 50 years. The diameter of such products varies from 16 to 63 mm. The thickness of the walls can also vary depending on the application.

Corrugated pipes are light and heavy, the thickness of their walls varies

Polyvinyl chloride, from which corrugated products are made, has self-extinguishing properties, which is very necessary when working with electrical networks. This corrugation will prevent the spread of fire: it will begin to melt from the temperature, the molten edge is reduced and blocks the access of oxygen to the fire.

Tips for installing PVC electrical pipes

In some cases, leaking pipes are installed. Usually, such installation is performed, if only mechanical cable protection is required. In other situations, install structures, which have moisture-proof and dust-proof properties.

Importantly! It is strictly forbidden to install electrical plastic pipes very close to heaters. This may cause the wiring to heat up. At the intersection of electrical and heating pipes anywhere, the distance between them should be minimal 5 cm. If the plastic pipe with the cable is parallel to the heater, then the gap between them should be minimal 10 cm.

exept this, it is not recommended to connect the wires inside the pipes. To do this, use electrical boxes. The PVC technical pipe is assembled using standard connecting fittings. The range of fittings is quite wide, that allows to choose the necessary product and to mount a design of practically any kind.

An electrical box is used to connect several wires and branch the network

If the installation of the structure is carried out indoors, where the humidity level does not exceed the norm, then installation of sealing elements on joints of details is not required. If the room is damp, then the installation of seals is required.

Features of installation of a corrugated pipe

Corrugated pipes, as mentioned above, happen with a broach and without broach. The presence of a long wire allows you to simplify the installation of the structure.

There are several steps to install a corrugated pipe:

  1. cut the part into pieces of the desired size;
  2. stretch the cable, attaching it to the probe;
  3. snack on a long wire of steel. This can be done with side cutters.
  4. after that the corrugated pipe with wiring is fixed in a predetermined place.
  5. for fastening of a corrugated pipe, usually, plastic clips or clips made of other materials are used.

Security is the first and most important rule, relating to the installation and operation of electrical networks. The use of protective elements will help prevent accidents and extend the life of cables.