What is a cable junction box?

What you should say is the cable T junction box.

Cable T-junction box is mainly suitable for T-shaped branch connection when cables cannot be cut in buildings and industrial electrical equipment. In the past, the T-shaped connection of wires usually used the method of stripping the cable insulation, winding the branch line on the main line and wrapping it with insulating cloth. The harm of this connection mode is poor reliability and high contact resistance, which is easy to lead to power accidents; Moreover, when the cross section of branch conductor is > > 10mm2, manual winding is difficult to operate. In recent years, prefabricated branch cable technology has been introduced into China, but there are still some problems, such as troublesome design, difficult field laying, poor contact reliability and high price, which make it difficult to popularize it comprehensively. Nowadays, the appearance of a cable T-junction box with high reliability and low economic cost has solved this technical problem. The core part of the box is a "T"-shaped terminal, which is connected by a group of clamps with special structure, which alternately contains the wires and has a large contact area (the contact area is several times the rated cross section of the wires); The contact pressure is high (the torque can vary from 12Nm to 40Nm according to the test of different screw diameters), and the contact pressure remains unchanged during the whole service life. After testing, the voltage drop is < 1.98mv (IEC standard is 3.2

mV)； Temperature rise: 14~ 17K(IEC standard is 45k); Can withstand 120A/

Short circuit strength test of mm2. It is a cable T-joint equipment with excellent electrical performance.

Structural features: the cable T-junction box is made of high-quality cold-rolled steel plate, which is plastic-sprayed on both sides and durable. The "T" terminal in the box consists of three parts: insulating base, wiring frame and protective cover. The wiring frame consists of four parts: wire clamp, screw, nut and support frame. The contact surface between the wire clamp and the wire is an inclusive sawtooth structure, which has the characteristics of large contact area and reliable crimping. Through the combination of conductor clips with different shapes, double-layer wiring can be formed, with the lower layer connected to the main line and the upper layer connected to the branch line, forming a "T" shape with continuous main line. l

Technical features:

1, which realizes the trunk wiring when the optical cable is not cut off, has flexible configuration, saves time, labor and cost, and is well received by the construction team;

2, the installation and use are very convenient, and the reliable connection of bare wires and copper-aluminum transition can be realized without special tools and bare copper terminals (wiring noses);

3. All electrical performance indexes meet IEC international standards, with excellent conductivity, low resistance loss and small voltage drop, and the voltage drop at contact point is only 1.98.

MV is 2/3 of IEC standard;

4. Strong heat resistance and impact resistance, and can withstand 120A/

The short-circuit strength test of mm2 shows that the insulating base is made of incombustible material, and its aging resistance is outstanding. Compared with plug-in bus duct and prefabricated branch cable, the project cost is saved by 50%~70%.