(1) the construction of electricity power distribution system should set the total distribution box, distribution box, switch box, and follow the "total - points - on" order for classification set, and the formation of "three distribution" mode.
(2) the construction of each distribution box with a power distribution system, the installation position of the switch box to be reasonable. The total distribution box to try to close the transformer or external power source in order to introduce the power supply. Distribution box should be installed in electrical equipment or the load is relatively concentrated in the heart, to ensure that the three-phase load balance. Position switch box should be installed depending on site conditions and working conditions as close to the electrical equipment under their control.
(3) ensure temporary power distribution system three-phase load balance, the construction site of the power of electricity and lighting electricity should form two electric circuits, power distribution box lighting distribution box should be set separately.
(4) All electrical equipment construction site must have its own dedicated switch box.
(5) inside the box and set the levels of distribution box must comply with safety regulations, electrical switches should be earmarked, cabinet should be uniform number. Stop using the power distribution box should be cut off, the door locked. Fixed distribution box should be set to the fence, and there are water-resistant anti-smashing action.
(6) distribution box and distribution cabinet distinction. According to GB / T20641-2006 "General requirements for low-voltage switchgear and control equipment shell body" Note: the scene to see, not only the door has disappeared, and the switch is still in the "ON" state, a total of six cables exposed above not posted any warning. Since the power distribution box is located north of aerospace southbound bus stop about 50 meters of the location, but also in the southeast corner of the island, past people flocked to the large flow of people.