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Dongli Electric
Distribution box in the construction should pay attention to what problems?
Release time:
2018-06-06
Remind the distribution box in the construction should pay attention to what problems?(1) construction power distribution system should be set up the general distribution box, distribution box, switch box, and in accordance with the "total-divided-open" order for grading settings, and form a "three-level distribution" mode.
Remind the distribution box in the construction should pay attention to what problems?
(1) The power distribution system for construction shall be equipped with general distribution box, sub-distribution box and switch box, and shall be graded according to the order of "total-sub-open" and form a "three-level distribution" mode.
(2) The installation position of each distribution box and switch box of the power distribution system for construction shall be reasonable. The general distribution box should be as close as possible to the transformer or external power supply to facilitate the introduction of power supply. Distribution box should be installed in the center of the electrical equipment or load is relatively concentrated, to ensure that the three-phase load balance. The installation position of the switch box shall be as close as possible to the electrical equipment controlled by it according to the site conditions and working conditions.
(3). To ensure the three-phase load balance of the temporary power distribution system, the power and lighting power of the construction site shall form two power circuits, and the power distribution box and lighting distribution box shall be set separately.
(4) All electrical equipment on the construction site must have their own dedicated switch box.
(5) The boxes and internal settings of the distribution boxes at all levels must comply with safety regulations. The switch appliances should be marked for use, and the boxes should be numbered uniformly. The power supply of the distribution box shall be cut off and the door shall be locked. The fixed distribution box shall be provided with fence and rain-proof and smashing-proof measures.
(6). The difference between distribution box and distribution cabinet. According to GB/T20641-2006 "General Requirements for Empty Shell of Low Voltage Switchgear and Control Equipment", it is observed on site that not only the door has disappeared, but also the switch is in "ON" state, with a total of 6 cables exposed without any warning. As the distribution box is located about 50 meters north of the bus stop in the south of the space bridge, and on the southeast corner of the island, there is an endless stream of people passing by, with a large flow of people.
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