2)The distribution box shall be installed firmly, horizontal and vertical, and the vertical deviation shall not be greater than 3mm; During concealed installation, there shall be no gap around the distribution box, the edges around the panel shall be close to the wall . 2)The distribution box shall be installed firmly, horizontal and vertical, and the vertical deviation shall not be greater than 3mm; During concealed installation, there shall be no gap around the distribution box, the edges around the panel shall be close to the wall . 1)The distribution box shall be installed in a concealed way. The distribution box shall be embedded in the wall. When building the wall, the reserved hole shall be about 20mm larger than the length and width of the distribution box. Generally, the installation elevation is 1. It takes the incoming power and safely distributes it to different circuits throughout your building. Failure to comply with AWD shipment preparation requirements, safety requirements, and product restrictions. Wiring requirements of distribution box Upper incoming line, lower outgoing line, main circuit on the left, control circuit on the right, horizontal and vertical. In many mature low-voltage product families, much of the structural concept is already standardized.