Due to the flammability, explosiveness, and susceptibility to poisoning of explosive gases, electrical safety and explosion prevention in hazardous areas are crucial. In order to standardize the electrical safety and explosion prevention work in hazardous areas, the country has formulated corresponding regulatory standards, namely AQ3009-2007 "Electrical Safety and Explosion Prevention Specification for Hazardous Areas".

This standard is divided into ten chapters, including scope, normative references, terminology and definitions, classification of hazardous areas, electrical system safety, explosion-proof electrical equipment, selection and installation, maintenance and repair of electrical equipment and instruments, grounding and neutral systems, and inspection and testing.

In the regulations, clear provisions have been made for the classification of hazardous areas and electrical equipment. According to the different levels of danger in hazardous areas, they are divided into Zone 0, Zone 1, and Zone 2. Zone 0 is the most dangerous, followed by Zone 1, and Zone 2 is relatively safe. According to the electrical sparks and thermal effects that may be generated by electrical equipment in hazardous areas, it is divided into Class I, Class II, and Class III electrical equipment. Therefore, when selecting and using electrical equipment, it is necessary to follow the classification of hazardous areas and the classification of electrical equipment to ensure the correct selection of explosion-proof electrical equipment.

In addition, the specifications also require structural components such as inlet and outlet flanges and protective covers for explosion-proof electrical equipment, and stipulate that the structure of the cable entry device should be able to prevent cable explosion accidents caused by vibration, friction, and damage. For the selection of explosion-proof electrical equipment, different hazardous areas require different explosion-proof electrical equipment. For example, in places with high dust, dust explosion-proof electrical equipment should be selected; Explosion proof or increased safety explosion-proof equipment should be selected in explosive hazardous areas containing flammable gases or dust.

The AQ3009-2007 "Electrical Safety and Explosion Protection Code for Hazardous Areas" also provides detailed regulations on the installation, maintenance, and repair of explosion-proof electrical equipment. For example, when installing electrical equipment, construction must be carried out according to the drawings, and the installation location should meet the requirements of the specifications; When maintaining and repairing electrical equipment, it is necessary to regularly check whether the fasteners of the electrical equipment are loose, whether the insulation is damaged, etc. Any abnormalities found should be dealt with in a timely manner. In summary, AQ3009-2007 "Code for Electrical Safety and Explosion Protection in Hazardous Areas" provides comprehensive and detailed regulations on electrical safety and explosion protection in hazardous areas, providing strong guarantees for the safety production of enterprises. At the same time, it also reminds us that every employee should attach importance to electrical safety and explosion prevention work, effectively implement the requirements in the standard specifications, and jointly maintain the safety production of the enterprise.