Workers (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the movement of packaging products or equipment, as well as friction and mixing in high-temperature rooms, can produce static. This static 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 can ignite and explode flammable gases like natural gas, oil, and alcohol. Therefore, equipment, containers, and pipelines prone to static generation must have proper grounding. Similarly, production processes prone to static generation should also be grounded properly. Grounding refers to the electrical connection between a specific point in a system, device, or equipment and the local ground (Earth). Thus, the lower the resistance, the faster the current flows, and the higher the level (or safer) of protection for the equipment (or grade). Additionally, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of Grounding: Includes working grounding, protective grounding, static-dissipative grounding, lightning protection grounding, multiple grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, and 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 Working Area: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning protection grounding: ≤10Ω

The factory or laboratory can select the appropriate grounding resistance value based on their own environmental requirements.

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

Guangzhou LiXiang Anti-Static Technology Co., Ltd. has many years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical staff and construction teams, capable of providing technical references based on your production or safety environment, and recommending the appropriate resistance value standard. We welcome inquiries and orders from various manufacturers and companies, thank you!