GB/T 3836.18-2024 standard Part 18 specifies requirements for the design, installation, maintenance and inspection of intrinsically safe electrical systems to ensure the safety and reliability of electrical equipment used in explosive environments. This standard applies to electrical equipment in environments with explosive gases or dust, especially intrinsically safe electrical systems. It aims to prevent electrical equipment from generating electrical sparks, thermal effects or arcs sufficient to cause an explosion during operation. The standard describes in detail the structural requirements, protective measures, test procedures and their symbols and identification rules for intrinsically safe electrical systems. By following these requirements, the safety of electrical equipment in hazardous environments can be ensured and the necessary safety guarantees can be provided for equipment users and maintenance personnel. This standard provides an important technical basis for the design and implementation of intrinsically safe electrical systems in explosive environments.