Where can I apply for a Class II explosion-proof certification for a gateway?

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.
Security explosion-proof certification technical issues and explosion-proof certification authorities
intrinsic safety certification, also known as intrinsic safety explosion-proof certification, involves limiting the circuit energy of electrical equipment to ensure that under normal operation or specified fault conditions, the electrical sparks or thermal effects produced by the equipment cannot ignite the surrounding flammable and explosive environment. Below is a detailed introduction to intrinsic safety certification by Shenzhen ZhongNuo Testing:

Can equipment with plastic casings be used in explosion-proof certification?
Sure.
intrinsic safety, which refers to the inherent safety of a device, primarily achieved by limiting the energy within the circuit, without any specific requirements for plastic or metal casings.
However, there are requirements for the use of plastic casings.
GB/T3836-1-26.13 specifically stipulates, to avoid the ignition hazard caused by static charge,
Surface resistance on Class II electrical equipment should be limited to not exceed 1 GΩ.

What specific drawings are required for applying for the explosion-proof certification for our product?
1. General Assembly Drawing
2. Circuit wiring diagram
3. Circuit Schematic
4. Printed Circuit Board (PCB) Design
5. Component layout drawing
6. Component Materials List
7. Transformer, inductor coil diagram (if applicable)
8. Packaging Diagram
Label Diagram

Explosion-proof electrical equipment inspection qualification
Regarding explosion-proof electrical testing qualifications, this generally involves two main aspects: product certification and on-site facility testing.
Product Certification:
Newly launched products must undergo relevant tests in accordance with the GB/T 3836 series standards.
(2) Upon passing the test, the product will obtain a防爆 certification, which is an essential qualification certificate for the product to be used in flammable and explosive environments.
(3) During the product certification process, the following documents are required: product design drawings, manuals, samples, etc.
2. On-site Venue Testing:
The on-site explosion-proof electrical equipment inspection is conducted in accordance with the provisions of AO3009-2007 standard.
(2) Electrical equipment in use must undergo a periodic explosion-proof inspection at least every 3 years.
(3) This inspection primarily targets users of explosion-proof equipment, ensuring safety and compliance during operation.
Shenzhen ZhongNuo Testing Technology Co., Ltd. boasts years of industry experience in explosion-proof testing and certification. We offer services including explosion-proof product design, testing, certification, as well as on-site inspections and construction modifications. Additionally, we provide customized explosion-proof technology and standard consulting services to meet the diverse needs of our clients.
If you have any needs or questions regarding explosion-proof electrical inspection qualifications, feel free to contact us at any time.
Explosion-proof Certification Application Consulting Service - Shenzhen Zhongnuo Testing Technology Co., Ltd.