The ready board is not installed firmly and the elevation does not meet the requirements. When it is concealed, the edges around the panel are not close to the wall.

Consequence: the installation elevation of the ready board does not meet the requirements, the installation is not firm, and the box is not vertical. When concealed, the edges around the panel are not close to the wall, affecting the use function and poor appearance.

Measures: the elevation shall meet the design requirements. If it is not specified in the design, the height from the bottom edge of the lighting ready board to the ground should be 1.5m. The height from the bottom edge of the lighting distribution board to the ground should be 1.8m.

The ready board shall be installed firmly, and the allowable deviation of installation perpendicularity shall not be greater than 3mm. During concealed installation, there shall be no gap around the ready board, the edges around the panel shall be close to the wall, and the contact parts between the box and buildings and structures shall be coated with anti-corrosion paint.