"Reasonable and healthy matching" of site distribution box

1. The distribution box on the construction site shall be equipped with outdoor general distribution box and distribution box, which shall be distributed according to three-level distribution and two-level leakage protection distribution;

2. The power distribution box and lighting distribution box shall be set separately. If they are combined in the same distribution box, the power and lighting lines shall be set separately, and the switch box shall be distributed by the final distribution box;

3. The main distribution box shall be set in the area close to the power supply, and the distribution box shall be set in the area where the electrical equipment and load are relatively concentrated. The distance between the distribution box and the switch box shall not exceed 30m. The horizontal distance between the switch box and the electrical equipment controlled by it should not exceed 3M.

4. The distribution box and switch box shall be installed in a dry, ventilated and normal temperature place. There shall be enough space and passage for two people to operate at the same time. No articles that hinder operation and maintenance, shrubs and weeds shall be stacked.

5. The distribution box and switch box shall be made of iron plate or excellent insulating material, the thickness of the iron plate shall be greater than 1.5mm, the distribution box and switch box shall be installed correctly and firmly, and the mobile distribution box and switch box shall be installed on a solid support; The vertical distance between the bottom of fixed distribution box and switch box and the ground shall be greater than 1.3m and less than 1.5m, and the vertical distance between the bottom of mobile distribution box and switch box and the ground shall be greater than 0.6m and less than 1.5m.