Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the friction and stirring between packaging products or handling equipment and the air in high-temperature rooms also produce static electricity. This static can easily cause electronic components to fail and burn, affect the accuracy of testing equipment, and cause computer systems to malfunction. The sparks from 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, as well as for production processes that are prone to static buildup. 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 class). 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, Repeated Grounding, Isolation Grounding, Shielded 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 Ground: ≤4Ω

Anti-static grounding: ≤4Ω

Surge Protection and Grounding: ≤10Ω

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

Recommendation: The ground resistance value for general factories 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 (cleanrooms of 100 grade or higher, electronic components with withstand voltage not exceeding 100V), the ground resistance value should be required to be ≤4Ω or higher.

Guangzhou Liying 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 suggest the appropriate resistance value for the standard level. Welcome manufacturers and companies to consult and place orders. Thank you!