Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Additionally, the friction and mixing between packaging products or handling equipment and the air in high-temperature rooms can also produce static electricity. The static electricity can easily cause electronic components to short-circuit 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 generate static. Grounding refers to the electrical connection between a specific point in a system, device, or equipment and the local ground (earth). Therefore, the lower the resistance, the faster the current flows, and the higher the level (or safer) of the equipment (or systems) that can be protected. Moreover, 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, 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 divided into three categories:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection: ≤4Ω

Static electricity grounding: ≤4Ω

Lightning 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, for chemical factories (manufacturing hazardous chemicals) and factories producing and processing 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 with 100 or higher cleanliness levels, and electronic components with withstand voltage 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 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!