Lab Grounding and Renovation Cases

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 such as natural gas, oil, and alcohol. Therefore, proper grounding is required for equipment, containers, and pipelines that are prone to static electricity, as well as for production processes that are prone to static electricity. Grounding refers to the electrical connection between a specific point in a system, device, or equipment and the local ground (earth). Therefore, the smaller the resistance, the faster the current flows, and the higher the level (or safer) of the equipment (or grade) 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, Anti-static Ground, Lightning Protection Ground, Repeated Grounding, equipotential grounding, Shielding Ground, Signal Grounding for Electronic Equipment, Power Grounding for Electronic Equipment, etc.

Based on international and domestic standards: The static grounding resistance values (ground resistance values) are categorized into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Work Site: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Surge Protection Grounding: ≤10Ω

Factories or laboratories can select the appropriate grounding 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 above 100级, 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 years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical staff and construction teams, ready to provide technical references based on your production or safety environment, and suggest the appropriate resistance value standard. Welcome manufacturers and companies to inquire and place orders. Thank you!