1. The distribution box should be made of non-combustible materials;
2. For production sites and offices with low risk of electric shock, open switchboards can be installed;
3. Closed cabinets should be installed in processing workshops, casting, forging, heat treatment, boiler rooms, carpentry rooms and other places with high risk of electric shock or poor working environment;
4. In dangerous workplaces with conductive dust or flammable and explosive gases, closed or explosion-proof electrical facilities must be installed;
5. The electrical components, instruments, switches and lines of the distribution box should be arranged neatly, firmly installed and easy to operate;
6. The bottom surface of the board (box) installed on the floor should be 5~10 mm higher than the ground;
7. The center height of the operating handle is generally 1.2-1.5m;
8. There are no obstacles within 0.8-1.2m in front of the box;
9. The protection line is connected reliably;
10. There shall be no bare electrified body exposed outside the box;
11. The electrical components that must be installed on the outer surface of the box or on the distribution board must have reliable screen protection.