Shenzhen ZhongNuo Inspection & Technology Co., Ltd. is based in South China, offering on-site explosion-proof construction, safety inspections, renovations, project acceptance, and explosion-proof installation consulting services. We are well-versed in explosion-proof construction standards, with experienced teams and a wealth of construction experience. We've served major enterprises such as PetroChina, LG, Hanlan Environment, BOE, and Sinovac Biotech, earning consistent praise and trust from our clients!
Basic Knowledge and Requirements for Cable Use in Explosion-Proof Construction Sites (Shared by Shenzhen ZhongNuo Inspection Technology Co., Ltd.)
Installation methods for electrical wiring in explosive gas environments can be categorized into cable wiring and conduit wiring methods.
Note: The installation of inherently safe circuits may not be in accordance with this provision.
7.1 General Provisions
7.2 Electrical wiring should be installed in areas with lower explosion hazard or at a greater distance from the source of release, avoiding locations prone to mechanical damage, vibration, corrosion, dust accumulation, and those with hazardous temperatures. When avoidance is not possible, preventive measures should be taken.
7.3 The selected low-voltage cables or insulated conductors must have a rated voltage higher than the working voltage of the line and not be less than 500V. Insulated conductors must be installed within conduits.
7.4 Prohibition of overhead lines with voltage of 10kV or below crossing explosive gas environments; the horizontal distance between the overhead lines and the explosive gas environment should not be less than 1.1 times the height of the pole tower.
7.5 Cables and accessories should be installed in such a way that, in accordance with actual conditions, they are protected from external mechanical damage, corrosion, or chemical effects (such as solvent influence), as well as the effects of high temperatures (see also 6.1.2.4.4 for this safety circuit). If such conditions cannot be avoided, protective measures should be taken during installation, such as using conduits or selecting appropriate cable types (e.g., armored cables, shielded wires, seamless aluminum sheathed cables, mineral insulated metal sheathed cables, or semi-rigid sheathed cables) to minimize damage.
7.6 Solid-core wires without sheath should not be used for conductive wiring unless they are installed inside a distribution board, housing, or conduit system.

Basic Specifications for Explosion-Proof Electrical Construction (Shared by Shenzhen ZhongNuo Testing Technology Co., Ltd.)
Explosion-proof electrical installation differs from standard electrical installation due to the increased explosion-proof requirements of its environment. Based on industry standards, an environment is considered explosive when a mixture of air and gases, vapors, thin mist, or dust is ignited, with the combustion spreading to the entire unburned mixture. An area where a large number of explosive gas environments or flammable dust environments are present or anticipated, requiring special precautions for the structure, installation, and use of electrical equipment, is known as a hazardous area. Explosion-proof electrical installation refers to a task that meets the requirements of explosion-proof electrical equipment, conditions, and personnel, involving work in explosive environments and hazardous areas, emphasizing strength.

With the development of the world's energy and chemical industries, construction in explosive hazard environments is becoming increasingly widespread, and the prevention and acceptance of such environments are becoming more important.
Especially in flammable dust environments, such as plastic factories, feed/food/grain processing plants, metal polishing workshops, and papermaking/forestry wood flour/fiber dust factories, the demand for explosion-proof installations, designs, and renovations is also increasing.
Whether it's large-scale explosion-proof or local explosion-proof, if there are hidden dangers in product quality or installation/renovation quality,
Our personnel and property security are greatly threatened, so we must strictly control the quality at every production stage to ensure the reliability and safety of explosion-proof installations and renovations.
Shenzhen Zhongnuo Testing Technology Co., Ltd. offers explosion-proof construction and retrofitting consultation services, boasting extensive qualifications and case studies – worth it!

Shenzhen Zhongnuo Testing Technology Co., Ltd. offers explosion-proof construction service in the field of:
Explosive gas environments and hazardous areas with explosive or flammable dust exist in numerous industries and sectors, including petrochemicals, metal smelting, fine chemicals, petrochemical ground facilities (gas stations, fueling stations, petrochemical warehousing and transportation), new energy, special equipment, nuclear power, tunnels, grain processing, wood processing, metal component manufacturing, environmental protection engineering, and more. Ensuring explosion-proof safety in these dangerous areas safeguards our and the national economy's development.
Explosion-proof electrical改造 for hazardous areas and on-site explosion-proof construction consulting services - Shenzhen Zhongnuo Testing Technology Co., Ltd.