Distribution box and switch box at construction site Th […]
Distribution box and switch box at construction site
The temporary distribution box on site shall be processed and customized by unified iron distribution box. The 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. The location shall be flat and 20cm higher than the ground, and the surrounding area shall be provided with fence and rain proof shed. And hang safety signs on the fence. The distribution box is equipped with two-level leakage protection. Considering that the general distribution box is equipped with a general leakage protector, which is prone to misoperation, the general distribution box is not equipped with a general leakage protector. The load side of the distribution box is equipped with a leakage protector, and then the load side of the switch box is equipped with a leakage protector, so as to achieve two-level leakage protection.
3、 Site lightning protection:
Make use of the lightning protection and grounding of the construction project, the construction site and the temporary living area, and connect the well frame, scaffold and tower crane with a height of more than 20 m for lightning protection
Safety enclosure and warning signs must be taken at the construction site to prevent outsiders from entering the work area and pedestrians from entering the construction area;
9) Strengthen the inspection before and during use. The protection zero line and the working zero line shall not be mixed. The leakage protector of the switch box shall be sensitive and reliable, and the parameters of the leakage protector shall be matched;
10) . power management and maintenance must be standardized and carried out by professional electricians. The distribution box must be locked and rainproof measures shall be taken.