Employees (operators) wearing synthetic clothing and moving around easily generate static discharges. Additionally, friction, stirring, and movement of packaging products or周转 equipment, as well as air in high-temperature rooms, can also produce static electricity. This static can easily cause electronic components to breakdown and burn, affect the accuracy of testing equipment, and lead to chaos in computer systems. Static sparks are also sufficient to ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, proper grounding is essential for equipment, containers, and pipelines prone to static electricity generation. Grounding refers to making an electrical connection between a specific point in a system, device, or equipment and the local earth (ground). Thus, the lower the resistance, the faster the current flows, and the higher the level (or safer) of equipment (or grade) that can be protected. Moreover, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: Working ground, Protective ground, Static electricity grounding, Lightning protection grounding, Multiple grounding, Equipotential grounding, Shielding grounding, Signal grounding for electronic equipment, Power grounding for electronic equipment, etc.

In accordance with 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: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection and Grounding: ≤10Ω

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

Recommendation: For general factories, the grounding resistance value can be required to be ≤10Ω (but if all equipment needs to be connected, the grounding resistance value should be ≤4Ω). For example, in chemical factories (manufacturing hazardous chemicals) and factories that produce and process flammable and explosive gases, the grounding resistance value should be required to be ≤4Ω or higher. For electronic factories, semiconductor factories, testing laboratories, and computer systems (cleanrooms with a 100-grade or higher, electronic components with withstand voltages 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 that can provide technical references based on your production or safety environment, and recommend the appropriate resistance value for the standard level. Welcome manufacturers and companies to consult and place orders. Thank you!