Shenzhen Zhongnuo Testing Technology Co., Ltd. is based in South China and specializes in explosion-proof certification and coal safety certification application consulting services, offering a one-stop explosion-proof technology consulting service.
If you happen to need explosion-proof certification for your products, Shenzhen ZhongNuo Testing Technology Co., Ltd. is here to help. We offer preliminary explosion-proof design and modification consultation, prototype modification guidance, assistance with preparation of technical drawings and documents, 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 an explosion-proof certification?
This is for sure.
The product undergoes explosion-proof certification, which is the process of passing the relevant testing projects of the explosion-proof standards to obtain an explosion-proof qualification certificate.
To ensure the product passes the explosion-proof standard testing projects, it is essential to design the product 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, refer to GB/T3836.1 and GB/T3836.4.
Designs for increased safety should refer to GB/T3836.1 and GB/T3836.3, etc.
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, a portion of 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 + factory audit" models, including both type tests for the products and on-site factory audits. The explosion-proof certificate, however, is for products not listed in the explosion-proof 3C catalog, and the certification process includes technical image evaluation and product testing; upon passing the product testing, 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, walkie-talkies, etc. Additionally, applicants 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 Testing Technology Co., Ltd. for more detailed guidance and assistance.

Can equipment in explosion-proof certifications use plastic casings?
Sure.
intrinsic safety, which refers to the inherent safety of the device, primarily achieved by limiting energy in the circuit; there are no specific requirements for the plastic or metal casing.
However, there are requirements for the use of plastic casings.
GB/T3836-1-26.13 specifies explicitly that to avoid the ignition hazard caused by static electricity charge,
Surface resistance on Class II electrical equipment should be limited to no more than 1GΩ.
Explosion-proof Certification Application Consulting Services - Shenzhen Zhongnuo Inspection Technology Co., Ltd.