Connection method of air switch in low voltage switch cabinet

When the low-voltage switchgear is installed on the wall, it should be fixed with open foot bolts (expansion bolts). The length of the bolts is generally the sum of the embedding depth (75-150mm), the thickness of the box bottom plate, the thickness of the nut and the washer, and then Add the "early margin" of about 5mm. For smaller switchgears, wooden bricks can also be pre-buried at the installation location (buried at the four corners of the switchgear or power distribution board), and then use wood screws to fix the switchgear or power distribution board at the wooden bricks.

The low-voltage switchgear is concealed, and the switchgear is embedded in the wall for installation. When the wall is built, the reserved holes should be about 20mm larger than the length and width of the switchgear. The reserved depth is the thickness of the switchgear plus the plastering thickness of the inner wall of the hole. When the switch cabinet is buried, the box body and the wall are filled with concrete to fix the box body. The switchgear should be installed firmly, horizontal and vertical, and the vertical deviation should not be greater than 3mm; when concealed, there should be no gaps around the switchgear, the edges of the panel should be close to the wall, and the part of the box that is in contact with the building or structure should be coated with anticorrosion paint.