Metal sleeve: design features, main types of metal hoses for cable, installation of the structure

Often, when installing an electric wire, it must be additionally protected; for this, a metal sleeve is used. This element helps to prevent various mechanical damage, moisture and other aggressive substances. In addition, the presence of a flexible cable channel reduces the risk of fire hazardous situations, even in the event of overheating and spread of fire.

Main varieties

When choosing a structure, it is necessary to take into account the climatic conditions in which it will work. According to this principle, a metal hose for a cable can be made of the following materials:

• galvanized steel tape;
• stainless steel;
• PVC insulation.

The most popular products both for home use and on an industrial scale are sleeves, for the manufacture of which it is used Cink Steel. The fact is that stainless steel is quite expensive and is used only in some cases, for example, in places where there is a possibility that the electrical wiring may be exposed to corrosive Wednesday.

The main areas of application for metal hoses are warehouses, street networks and industrial buildings. For owners of private houses, the installation of such products is considered mandatory, since even a slight overheating of the wire can cause a fire hazard.

Specifications

At the very beginning, it is necessary to consider the features and basic parameters of metal sleeves. As a starting material, a galvanized sheet is used, the thickness of which is on average three microns. The existing gap between the twisted plates can be sealed with one of the following materials:

• cotton fabric for models of the RZ-TsKh brand;
• propylene film for RZ-SL models.

Thanks to this technology, cable lines are flexible and reliably protected from all kinds of damage and contamination in the form of dust and dirt. And the sleeves, equipped with a polypropylene sealant, withstand even the most intense moisture loads. That is why hoses are recommended for both open and internal wiring.

In addition, they are often used in electrical circuits that serve ventilation, heating and air conditioning. And the presence of a metal sheath in the case, which provides a high rate of protection against fire, allows the cable to be used in open wiring in wooden buildings.

It is also worth noting that the presence of a metal sleeve provides reliable protection against electrical interference. Of the many advantages that this design possesses, several main ones can be distinguished:

• strength, due to which the wiring is able to withstand any mechanical stress;
• reliable protection against the penetration of dirt, dust and water;
• high rate of fire safety.

It should be noted that the products are presented in a wide selection. Metal hoses can be purchased with almost any inner diameter, it can vary from 10 to 100 millimeters.

Operating rules

When working with the electrical network, safety should always be a priority, and although installation of the metal sleeve there is no voltage, it can also harm both a person and property. To extend the service life of the cable channel, you must follow some rules, namely:

• the material should be stored only in a dry room, while it is better to lay the hoses in a lying state;
• the wiring is laid in accordance with the diagram and marking of the future line, in which case it is possible to calculate the bending angles and the necessary shifts in advance;
• immediately before installation, it is necessary to carefully inspect the metal hose for cracks, holes and other damage;
• the product must be absolutely clean both outside and inside;
• when unwinding the coil, as well as during laying, you cannot pull the cable channel too much, the fact is that it can stretch, and this will affect the strength;
• when carrying out welding work, it is necessary to ensure that sparks do not fall on the material, otherwise its integrity may be violated.

The metal sleeve very reliably protects electrical wires from mechanical damage and electromagnetic influences. In addition, foreign substances do not get on the cable, and dust does not settle, which means that its operational life increases. But it is worth remembering that the product is not intended for the localization of fires, therefore, in the event of a fire, it will ignite along with the cable. This is due to the fact that the seals are made of flammable materials.