In home decoration, the junction box is one of the electrical accessories, because the wires used in the decoration pass through the wire tube, and the junction box is used as a transition at the connection part of the wire (for example, the line is relatively long, or the wire tube has a corner) Use, the wire tube is connected to the junction box, and the wires in the wire tube are connected in the junction box to protect the wires and connect the wires. This is the junction box. Some people often think that there is no difference between the functions of the junction box and the switch box. What are the differences between the two? Let's get to know:
1. The junction box is the length of the pipeline in the electrical piping line. When the pipeline elbow exceeds the distance and the number of elbows specified in the specification, and when the pipeline has branches, the crossing transition box must be installed. The pipeline is reserved for the load terminal Boxes are all junction boxes. Its function is to facilitate threading, branching and transition wiring.
2. Switch box, socket bottom box. Lamp box is the terminal box for these three types of installation. It is used for installing lamps, switches, and sockets when installing fixed panels and wiring in the box.
3. Although junction boxes and switch boxes are auxiliary materials in electrical installation engineering, in the separate junction box and switch box installation quota sub-items, they are indeed unpriced main materials, and the unit price of the main materials needs to be entered.
4. Whether the junction box and the switch box are metal boxes or pvc plastic boxes, the h86 type box is commonly used in installation engineering, which has a width of 86mm and a depth of 50mm. 70mm (h86*s50. h86* s60.h86*s70. h86*s80, and 146h*s50. 146h*s60).
5. When calculating the junction box, the lamp head box, socket box and switch box are calculated according to the actual quantity of the drawing; the branch junction box must be transitioned according to the pipeline branch or return pipe, and the straight line distance of the pipeline and the number of elbows exceed the specifications. A junction box must be added when required to perform actual calculations. In this part, attention must be paid to the pipeline conditions and the pipeline and elbow conditions for analysis and calculation, otherwise it is not less than the calculation.
