Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the movement of packaging products or周转 equipment and 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 sufficient to ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, proper grounding is required for equipment, containers, and pipelines 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 ground (earth). 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. Furthermore, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of Grounding: Can be divided into working grounding, protective grounding, static-dissipative grounding, lightning protection grounding, redundant 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 Work Location: ≤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 specific environmental requirements.

Suggestion: The grounding resistance value for a general factory can be requested to be ≤10Ω (but should be ≤4Ω when all equipment is 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, computer systems (cleanrooms over 100-grade, 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!