1.. Guarantee the three-phase load balancing of temporary power distribution system, the power consumption and lighting electricity should be formed two power circuit, power distribution box and lighting distribution box should be set separately.
2. all electrical equipment at the construction site must have its own special switch box.
3. construction power distribution system shall be equipped with main distribution box, distribution box and switch box, and shall be classified according to the "total, sub - Open" sequence, and a "three stage distribution" mode will be formed.
4. construction power distribution system, the distribution box, switch box installation position should be reasonable. The main distribution box shall be as close as possible to the transformer or external power supply for the introduction of the power supply. The distribution box shall be installed in the central area where the power equipment or the load is relatively concentrated, so as to ensure that the three-phase load is balanced. The location of the switch box shall be as close as possible to the electrical equipment under its control, depending on the situation and the working conditions.
5., the box and the internal settings of the distribution box must comply with the safety requirements, switch electrical appliances should be marked for use, the box should be unified number. The switch box should be cut off and the door locked. The fixed distribution box shall be provided with a fence with rainproof and anti dropping measures.
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