The connecting box: how is it arranged and what is it intended for?

The connecting cable box is a small device that is designed to connect and branch armored and rubber cables on power or control circuits. This element is most often used in coal mines and on the surface as an element for connecting power cables. What are these mechanisms and how complex is their design? The answers to these questions will be found in our today's article.

Device

The connecting box consists of a high-strength flameproof enclosure and a panel. In this first part includes two mechanisms - the body and the lid. All the details of the junction box for lighting networks are very reliable and durable. Inside the case there is a special panel. It has about 9 pads with different markings (КР.1, КР.2.1, КР.3 and so on). These devices are necessary for making reliable contact with the power cable, or rather with its veins. In addition, the device has several special terminals for connecting them.

It should be emphasized that the box design also has external and internal grounding clamps. They are necessary for grounding the armor, sheath and the wire used in the structure of the device. Cable glands in their form have fuses - staples that protect the contacts from possible pulling out and other mechanical damages. It is impossible not to mention the presence of sealing elements in this box. In its design, a special O-ring is used, which is compressed by means of a nut or a coupling. Depending on the type of terminal and input used, several dozen types of these devices are distinguished.

Technical features

The connecting box, thanks to its robust and robust design, can be used and made contact in almost extreme conditions. The permissible temperature, within which this box can retain its properties of the conductor, is from -50 to +79 degrees Celsius. At the same time, the atmospheric pressure level can vary within the range of 630-850 mm Hg. Art. In addition, the junction box is used with 95% moisture of air and withstands all aggressive influences of impurities contained in the air environment.

Material

This apparatus is produced from two types of materials. It can be an alloy of the D16T series or ordinary sheet steel. Accordingly, depending on the material used, the junction box can be subdivided into milled and stamped.

How much does it serve?

The maximum service life of this device, approved by the manufacturer, may be of the order of 10-12 years. The calculation is carried out under the condition of a constant supply of electric current with a voltage of 220 volts and a current strength of 10 amperes. Thus, the junction box is one of the most durable devices that are used in this field.