Difference between Dalian explosion-proof junction box and ordinary junction box

Difference between Dalian explosion-proof junction box and ordinary junction box

As the basic component of electrical connections, junction boxes have evolved into various types due to different usage scenarios, among which explosion-proof junction boxes have significant differences in performance and function compared to ordinary junction boxes. These differences are not only reflected in structural design, but also in the safety and reliability of electrical systems.

The design principles and security mechanisms are the core watershed between the two. Ordinary junction boxes are only used to protect against dust and moisture, ensuring stable physical connections of the circuit; The Dalian explosion-proof junction box is designed for flammable and explosive environments, using "explosion-proof" or "intrinsic safety" technology. The former withstands internal explosion pressure and prevents flame spread through a high-strength shell, while the latter limits circuit energy to prevent electric sparks from igniting dangerous gases and fundamentally eliminates explosion hazards.

The gap between material and process standards is further widened. Ordinary junction boxes are mostly made of ordinary plastic or metal, with a protection level generally ranging from IP44 to IP54, only meeting basic dust and waterproof requirements; Explosion proof junction boxes are made of flame-retardant alloys (such as aluminum alloy, stainless steel) or special engineering plastics, which are treated with anodizing and surface spraying to achieve a protection level of IP68. They have characteristics such as impact resistance, corrosion resistance, and high temperature resistance. The sealing structure achieves dual protection through silicone rubber sealing rings and high-precision threads.

 

The application scenario determines the irreplaceability of two types of junction boxes. Ordinary junction boxes are suitable for regular environments such as homes and offices, handling low voltage and low current circuit connections; Explosion proof junction boxes are widely used in high-risk fields such as petrochemicals, coal mining, and natural gas transportation, and need to ensure the safe operation of electrical systems in environments with strong corrosion, high dust, and flammable gases. For example, explosion-proof junction boxes in coal mines require strict explosion-proof certification to ensure stable power supply for equipment in gas environments.

In summary, the difference between Dalian explosion-proof junction boxes and ordinary junction boxes is essentially a concrete manifestation of the differences in safety requirements and application scenarios. The former, with its ultimate protective performance, has become an indispensable safety barrier in special industrial scenarios.

The above article compares the differences between two types of junction boxes from multiple perspectives. If you wish to supplement specific data, add cases, or adjust the content in detail, please feel free to let us know at any time.