Hainan distribution box
(1) The construction power distribution system shall be provided with a main distribution box, a sub-distribution box and a switch box, which shall be arranged in a hierarchical manner according to the order of "main-sub-on" and form a "three-level distribution" mode.
(2) The installation positions of distribution boxes and switch boxes in the construction power distribution system should be reasonable. The main distribution box should be as close as possible to the transformer or external power supply to facilitate the introduction of power supply. The distribution box should be installed in the center of electrical equipment or relatively concentrated load as far as possible to ensure the balance of three-phase load. The installation position of the switch box should 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 consumption and lighting consumption at the construction site should form two power consumption loops, and the power distribution box and lighting distribution box should be set separately.
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(4) All electrical equipment on the construction site must have their own dedicated switch box.
(5) The boxes and internal settings of distribution boxes at all levels must comply with the safety regulations, and the switch appliances should be marked with the purpose, and the boxes should be numbered uniformly. Stop using the distribution box should be cut off power supply, box door locked. The fixed distribution box of complete electrical equipment manufacturers should be fenced, and rainproof and smash-proof measures should be taken.
(6). The difference between distribution box and power distribution cabinet. According to GB/T20641-2006 "General requirements for empty housings of low-voltage switchgear and controlgear"
Distribution boxes are generally used for household use, while distribution cabinets are mostly used in centralized power supply, such as industrial electricity and building electricity. Distribution boxes and distribution cabinets are complete sets of equipment, distribution boxes are low-voltage complete sets of equipment, and distribution cabinets have high voltage and low voltage. Hainan distribution cabinet