The switchgear, measuring instruments, protective appliances and auxiliary equipment are assembled in a closed or semi-closed box or on the screen. This constitutes the distribution box. What are the safety technical requirements of the distribution box? The factory technicians sorted out 10 points to share with you:
1. All distribution box doors should be equipped with locks. Do not connect or plug in other temporary power equipment in the distribution box and switch box. Do not place any debris in the switch box.
2. Each electrical equipment should have its own dedicated switch box. Each electrical equipment on the construction site shall have its own dedicated switch box, and must meet the requirements of “one machine, one brake, one leak”. It is strictly forbidden to directly control two or more electrical equipment (including sockets) with the same switchgear. A leakage protector must be provided in the switch box. The rated leakage current should be no more than 30ma, and the leakage action time should be no more than 0.1s.
3, the electric box, switch box should be installed positive, firm, not inverted, skewed. The lower part of the fixed distribution box and the switch box shall be perpendicular to the ground and shall be greater than 1.3m and less than or equal to 1.5m; the distance between the lower part of the mobile distribution box and the switch box shall be greater than or equal to 0.6m and less than Equal to 1.5m.
4. It is strictly forbidden to connect with the power cord of the high-voltage distribution box; the box material of the distribution box and the switch box is generally steel plate, and the insulation board can also be used, but the wooden material should not be used; the distance between the electric boxes is not suitable. Too far. The distance between the distribution box and the switch box shall not exceed 30m. The horizontal distance between the switch box and the stationary power equipment should not exceed 3m.