Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Similarly, friction, stirring, and movement of packaging products or周转 equipment in high-temperature rooms can also produce static electricity. The static electricity generated 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 produced 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 generation, 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 equipment (or grade) that can be protected. Additionally, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: including working grounding, protective grounding, antistatic grounding, lightning protection grounding, repeated grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, and power grounding for electronic equipment, etc.

According to international and domestic standards: The resistive value of static grounding resistance (earth resistance) is divided 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 and Grounding: ≤10Ω

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

Recommendation: For general factories, the grounding resistance value can be required to be ≤10Ω (but if all equipment needs to be connected, the grounding 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 grounding resistance value should be required to be ≤4Ω or higher. For electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms with a cleanliness level of 100 or above, and electronic components with withstand voltages not exceeding 100V), the grounding 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 recommend the appropriate resistance value standard. Welcome all manufacturers and companies to inquire and place orders. Thank you!