Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the movement of packaging products or周转 equipment, as well as friction and mixing in high-temperature rooms, can also produce static electricity. The static electricity can easily cause electronic components to breakdown and burn, affect the accuracy of testing equipment, and cause computer systems to malfunction. The sparks generated by static electricity 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 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 flow, and the higher the level (or safer) of equipment (or class) 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-dissipative ground, lightning protection ground, multiple grounding, equipotential grounding, shielding ground, 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 divided into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication working site: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection Grounding: ≤10Ω

Manufacturers or laboratories can select the appropriate grounding resistance value based on their specific environmental requirements.

Recommendation: The ground resistance value for general factories can be required to be ≤10Ω (but it should be ≤4Ω when all equipment is connected), for example, in chemical factories (manufacturing hazardous chemicals) and factories producing 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 (cleanrooms of 100 grade or higher, with electronic components having withstand voltages not exceeding 100V), the ground resistance value should be required to be ≤4Ω or higher.

Guangzhou Lihuang Antistatic Technology Co., Ltd. has extensive 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 standard. Welcome all manufacturers and companies to inquire and place orders. Thank you!