Shenzhen ZhongNuo Inspection & Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering one-stop explosion-proof technology consulting services.
If you happen to be in need of explosion-proof certification for your products, Shenzhen ZhongNuo Testing Technology Co., Ltd. is here to assist. We offer pre-certification explosion-proof design and renovation consultation, prototype renovation guidance, assistance with preparation of technical drawings and documentation, and certification acquisition agency services. Feel free to send us a private message!

Why is it necessary to do explosion-proof design before applying for explosion-proof certification?
That's for sure.
The product undergoes explosion-proof certification, which is the process of passing the relevant testing projects of explosion-proof standards to obtain an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard testing projects, it must be designed in accordance with the testing requirements, which is to say, to implement explosion-proof design.
For explosion-proof requirements, refer to GB/T3836.1 and GB/T3836.2. For intrinsic safety design, consult GB/T3836.1 and GB/T3836.4.
Design for explosion-proof should refer to GB/T3836.1 and GB/T3836.3, etc.
The above information is shared by Shenzhen ZhongNuo Inspection Technology Co., Ltd.!

Difference Between Explosion-Proof 3C Certification and Explosion-Proof Certificate of Conformity
As of October 1, 2009, certain explosion-proof electrical equipment was included in the CCC certification catalog. Products listed in the catalog must undergo explosion-proof 3C certification, which involves both product testing and factory audits. This includes both type testing of the products and on-site factory evaluations. The explosion-proof certificate, however, is for products not listed in the explosion-proof 3C catalog, and the certification process includes technical image assessment and product testing; upon passing the product test, the explosion-proof certificate can be issued. Please note that while products within the explosion-proof 3C catalog can only obtain the explosion-proof certificate, there is a risk of being penalized by market supervision.
Requirements for obtaining the explosion-proof 3C certification
To obtain the explosion-proof 3C certification, it is necessary to target products listed in the explosion-proof 3C catalog, such as motors, fans, intercoms, etc. Additionally, the applicant must have a manufacturing facility or an OEM/ODM factory, as the explosion-proof 3C certification requires a "product testing + factory audit" approach.
If your product falls under the explosion-proof 3C certification list and you wish to learn more about the detailed information or application process for the explosion-proof 3C certification, please feel free to consult Shenzhen ZhongNuo Inspection & Technology Co., Ltd. for more in-depth guidance and assistance.

Can equipment with plastic casings be used in this explosion-proof certification?
Sure.
intrinsic safety, which refers to the inherent safety of a device, primarily achieved by limiting the energy within the circuit; there are no specific requirements for plastic or metal casings.
However, there are requirements for the use of plastic casings.
GB/T3836-1-26.13 specifies explicitly to avoid ignition hazards caused by static electricity charges,
Surface resistance on Class II electrical equipment should be limited to no more than 1 GΩ.
Explosion-proof Certification Application Consultation Service - Shenzhen ZhongNuo Testing Technology Co., Ltd.