Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Additionally, 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 detection equipment and instruments, and can also cause computer systems to malfunction. The sparks from static electricity are also sufficient to ignite and explode flammable and explosive gases such as natural gas, oil, and alcohol. Therefore, proper grounding is required for equipment, containers, and pipelines prone to static electricity, as well as for production processes that generate static electricity. Grounding refers to making an electrical connection between a specific point in a system, device, or equipment and the local ground (the earth). Therefore, the smaller 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 grounding, protective grounding, anti-static grounding, lightning protection grounding, multiple grounding, equipotential 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 Work Site: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Surge Protection Grounding: ≤10Ω

Factories or laboratories can select the appropriate ground resistance value according to their own environmental requirements.

Recommendation: For general factories, the ground resistance value can be required to be ≤10Ω (but if all equipment needs to be connected, the ground resistance value should be ≤4Ω). For example, in chemical factories (factories producing hazardous chemicals) and factories that produce and process flammable and explosive gases, the ground resistance value should be required to be ≤4Ω or higher. For electronic factories, semiconductor factories, inspection laboratories, and computer systems (clean rooms with a 100 or higher grade, electronic components with withstand voltage not exceeding 100V), the ground resistance value should be required to be ≤4Ω or higher.

Guangzhou Li Xiang Anti-Static 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 resistance value at what grade standard. Welcome manufacturers and companies to consult and place orders, thank you!