Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Additionally, the friction and stirring between packaging products or handling equipment and the air in high-temperature rooms can also produce static electricity. The static electricity generated can easily cause electronic components to break down and burn, affecting the accuracy of testing equipment and instruments, and can also disrupt computer systems. The sparks produced by static electricity are 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 pipelines that are prone to static electricity, as well as for production processes that are prone to static electricity. Grounding refers to making an electrical connection between a specific point in the system, device, or equipment and the local ground (Earth). Therefore, the smaller the resistance, the faster the current flows, and the higher the level (or safer) the protected equipment (or grade) is. Additionally, 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 divided into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication working ground: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection and Grounding: ≤10Ω

The factory or laboratory can choose an appropriate ground resistance value based on their specific environmental requirements.

Suggestion: For general factories, the grounding resistance value 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 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 (cleanroom 100 or above, with voltage withstand of electronic components 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 grade. Welcome manufacturers and companies to consult and place orders. Thank you!