Joint cable box is a small device designed for connecting and branching 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? Find out the answers to these questions in our today's article.
Device
Joint box consists of high-strength flameproof shell and panel. At the same time, its first part includes two mechanisms - a body and a cover. All parts that make up the junction box for lighting networks are very reliable and durable. A special panel is placed inside the case. It has about 9 pads with different markings.(KP.1, KP.2.1, KP.3 and so on). These devices are necessary for reliable contact with the power cable, or rather with its cores. In addition, the device has several special terminals for connecting them.
It is worth emphasizing that the box design also contains external and internal grounding clamps. They are necessary for grounding the armor used in the device, the sheath and the wire itself. Cable glands in their form have fuses - brackets that protect the contacts from possible pulling out and other mechanical damage. It is impossible not to note the presence of sealing elements in this box. Its design uses a special sealing ring, which is compressed with a nut or coupling. Depending on the specific type of terminals and inputs used, there are several dozen varieties of these devices.
Specifications
Joint box, thanks to its reliable and robust design, can be used and make contact in almost extreme conditions. The permissible temperature within which this box can retain its conductor properties is from -50 to +79 degrees Celsius. At the same time, the level of atmospheric pressure can vary between 630-850 mm Hg. Art. In addition, the junction box is used at 95% humidity and withstands all the aggressive effects of impurities contained in the ambient air.
Material
ProducedThis device is made of 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 divided into milled and stamped.
How long does it serve?
The maximum service life of this device, as approved by the manufacturer, can be in the order of 10-12 years. In this case, the calculation is carried out under the condition of a constant supply of electric current with a voltage of 220 volts and a current of 10 amperes. Thus, the junction box is one of the most durable devices used in this field.
