Electric Distribution Box Wiring Diagram
The wiring diagram of the household distribution box is also indispensable during installation. The following are a few very detailed wiring diagrams.
When we usually see multiple households using electricity, most of it is sent from a power distribution cabinet. The simple wiring diagram looks like this.
Installation method of household distribution box:
1. When assembling the electric box and installing the electric box on the wall, it should be fixed with open bolts (expanding pipe bolts). The length of the bolts is generally the depth of embedment (75～150mm), the thickness of the box bottom plate, the nut and the washer. The sum of the thickness, plus the "head margin" of about 5mm. For smaller distribution boxes, wooden bricks can also be pre-buried at the installation place (buried according to the positions of the four corners of the distribution box or distribution board), and then wood screws are used to fix the distribution box or power distribution at the wooden bricks. plate.
2. The electric box is concealed, and the distribution box is embedded in the wall for installation. The hole reserved when laying the wall should be about 20mm larger than the length and width of the distribution box. The reserved depth is the thickness of the distribution box plus the inner wall of the hole. The thickness of the plaster. When burying the distribution box, fill the space between the box body and the wall with concrete to fix the box body.
3. The distribution box should be installed firmly, horizontally and vertically, and the vertical deviation should not be greater than 3mm; when concealed installation, there should be no gaps around the distribution box, the edges of the panel should be close to the wall, and the box body should be in contact with buildings and structures. Part should be painted with anti-corrosion paint.
4. For the screw fuse installed in the distribution box, the power cord should be connected to the terminal of the middle contact, and the load line should be connected to the screw terminal. In this way, you will not get an electric shock when loading and unloading the fuse. The porcelain plug-in fuse should be installed vertically.
5. The AC, DC or power supplies of different voltage levels in the distribution box shall have obvious signs. In the lighting distribution box, the neutral line (N line) and the protection neutral line (PE line) bus bars should be set respectively. The neutral line and the protection neutral line should be connected on the bus bar, and must not be twisted, and should be numbered.
6. When the wire is led out of the panel, the panel wire hole should be smooth and free of burrs, and the metal panel should be equipped with an insulating protective cover. The metal shell distribution box shell must be reliably grounded (connected to zero).
