Employees (operators) wearing synthetic clothing and moving around easily generate static discharges. Additionally, friction, mixing, and movement of packaging products or周转 equipment (circulation equipment) in high-temperature rooms can also produce static electricity. The static electricity can easily cause electronic components to short-circuit and burn out, affecting the accuracy of testing equipment and instruments and causing computer systems to malfunction. The sparks produced by static electricity are also 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 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 the system, device, or equipment and the local ground (Earth). Thus, the smaller the resistance, the faster the current flows, and the higher the level (or safer) the protected equipment (or rating) is. Additionally, good grounding can effectively reduce static noise in computer systems caused by potential changes.

Types of grounding: including working grounding, protective grounding, static electricity grounding, lightning protection grounding, multiple 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 working ground: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection Grounding: ≤10Ω

Factories or laboratories can select the appropriate grounding resistance value based on their own environmental requirements.

Recommendation: The general factory grounding resistance should be ≤10Ω (but the grounding resistance should be ≤4Ω if all equipment needs to be connected), for example, in chemical factories (manufacturers of hazardous chemicals) and factories producing 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 Liying Static Electricity Technology Co., Ltd. has many years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical personnel and construction teams that can provide technical references based on your production or safety environment, and suggest the appropriate resistance value standard. Welcome manufacturers and companies to consult and place orders. Thank you!