Employees (operators) wearing synthetic clothing and walking can easily generate static discharge. Additionally, the movement of packaging products or equipment and the friction, stirring in high-temperature rooms can also produce static electricity. The static electricity can easily cause electronic components to break down and burn, affecting the accuracy of detection equipment and instruments, and can also cause computer systems to malfunction. The sparks generated by static electricity are also sufficient to ignite and explode flammable and explosive gases such as natural gas, oil, and alcohol. Therefore, good grounding is required for equipment, containers, and pipes that are prone to static electricity generation, as well as for production processes that are prone to static. Grounding refers to making an electrical connection between a specific point in a system, device, or equipment and the local earth (ground). Therefore, the smaller the resistance, the faster the current flows, and the higher the level (or safer) the equipment (or grade) that can be protected. Furthermore, good grounding can effectively reduce static noise in computer systems caused by potential changes.

Types of grounding: Working Grounding, Protective Grounding, Static Dissipation Grounding, Lightning Protection Grounding, Multiple Grounding, Isopotential Grounding, Shielding Grounding, Signal Grounding for Electronic Equipment, Power Grounding for Electronic Equipment, etc.

Based on international and domestic standards: The static grounding resistance values (earth resistance values) are categorized into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection Ground: ≤4Ω

Anti-static grounding: ≤4Ω

Surge Protection Grounding: ≤10Ω

Factories or laboratories can select the appropriate grounding resistance value based on their own environmental requirements.

Recommendation: The grounding resistance value for general factories can be required to be ≤10Ω (but it should be ≤4Ω if all equipment needs to be connected), for example, in chemical factories (manufacturing hazardous chemicals) and factories producing and processing flammable and explosive gases, the grounding resistance value should be required to be ≤4Ω or higher; for electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms of 100 grade or above, electronic components with withstand voltage not exceeding 100V), the grounding resistance value should be required to be ≤4Ω or higher.

Guangzhou Lihuang Antistatic Technology Co., Ltd. has years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical staff and construction teams, ready to provide technical references based on your production or safety environment. We recommend the appropriate level of resistance value, and welcome inquiries and orders from various manufacturers and companies. Thank you!