Three defense lighting power distribution boxes With the rapid development of petroleum, chemical, mining and other industries, the use of production, warehousing, and rescue more and more widely, more and more varieties. How to prevent accidental explosion of the explosion-proof distribution box has become a very important issue in explosive gas hazardous locations. Since the explosion-proof distribution boxes inevitably generate sparks during their work, once they meet the explosive gas mixture at the production or rescue site, it will lead to an explosion accident, which will directly endanger the lives of national property and citizens. Therefore, as the most widely used lighting fixture, its explosion-proof technology has long attracted people's attention and great attention.
(1) The cabinet materials of the three-proof lighting power distribution boxes and switch boxes should generally be steel plates or insulation plates, but wooden materials should not be used.
(2) The electrical box and the switch box shall be installed in a correct and firm manner, and shall not be inverted or skewed. The vertical distance between the bottom of the fixed distribution box and the switch box and the ground shall be greater than or equal to 1.3m and less than or equal to 1.5m; the vertical distance between the bottom of the mobile distribution box and the switch box and the ground shall be greater than or equal to 0.6m. , less than or equal to 1.5m.
(3) The power cables entering the high and low voltage distribution cabinets are forbidden to be connected by bolts.
(4) The distance between the electric boxes should not be too far away. The distance between distribution box and switch box shall not exceed 30m. The horizontal distance between switch box and fixed power equipment should not exceed 3m.
(5) Each electrical equipment should have its own dedicated switch box. Each electrical equipment on the construction site shall have its own dedicated switch box and shall meet the requirements of “one machine, one brake, one leakage and one leakageâ€. It is forbidden to use the same switch electrical equipment to directly control two or more electrical equipment (including sockets). A leakage protector must be provided in the switch box. The rated leakage current should not exceed 30mA, and the leakage operation time should not exceed 0.1s.
(6) In order to ensure safety, all distribution box doors should be equipped with locks, and no temporary power equipment can be attached or plugged into the distribution box or switch box. It is forbidden to place any debris in the switch box.
(1) The cabinet materials of the three-proof lighting power distribution boxes and switch boxes should generally be steel plates or insulation plates, but wooden materials should not be used.
(2) The electrical box and the switch box shall be installed in a correct and firm manner, and shall not be inverted or skewed. The vertical distance between the bottom of the fixed distribution box and the switch box and the ground shall be greater than or equal to 1.3m and less than or equal to 1.5m; the vertical distance between the bottom of the mobile distribution box and the switch box and the ground shall be greater than or equal to 0.6m. , less than or equal to 1.5m.
(3) The power cables entering the high and low voltage distribution cabinets are forbidden to be connected by bolts.
(4) The distance between the electric boxes should not be too far away. The distance between distribution box and switch box shall not exceed 30m. The horizontal distance between switch box and fixed power equipment should not exceed 3m.
(5) Each electrical equipment should have its own dedicated switch box. Each electrical equipment on the construction site shall have its own dedicated switch box and shall meet the requirements of “one machine, one brake, one leakage and one leakageâ€. It is forbidden to use the same switch electrical equipment to directly control two or more electrical equipment (including sockets). A leakage protector must be provided in the switch box. The rated leakage current should not exceed 30mA, and the leakage operation time should not exceed 0.1s.
(6) In order to ensure safety, all distribution box doors should be equipped with locks, and no temporary power equipment can be attached or plugged into the distribution box or switch box. It is forbidden to place any debris in the switch box.
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