The distribution box is mainly used for power supply, and its ventilation facilities need to be well treated. The distribution box shall be installed in a dry, ventilated and normal temperature place, and shall not be installed in a place with seriously damaging gas, flue gas, steam and corrosive gas and liquid. The ground below the distribution box shall be flat and stable; The use space shall be solid, without sinking and ponding, and no articles hindering operation and maintenance shall be stacked around. The accessories and lines are fastened in the distribution box as a whole. Its metal shell shall be used for protection to meet its use requirements.