Employees (operators) wearing synthetic clothing and moving around can easily generate static discharges. Similarly, the movement of packaging products or周转 equipment and the friction, stirring, etc., in high-temperature rooms can also produce static electricity. The static electricity can easily cause electronic components to breakdown and burn, affecting the accuracy of detection equipment and instruments, and can also cause computer systems to malfunction. The sparks from static electricity are also sufficient to ignite and explode flammable and explosive gases such as natural gas, oil, and alcohol. Therefore, proper grounding is essential 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 making an electrical connection between a specific point in a system, device, or equipment and the local ground (the earth). Therefore, the smaller the resistance, the faster the current flows, and the higher the level (or safety) of the equipment (or grade) that can be protected. Additionally, good grounding can effectively reduce static noise in computer systems caused by potential changes.

Types of grounding: working grounding, protective grounding, anti-static grounding, lightning protection grounding, repeated grounding, equipotential grounding, shielding grounding, 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 divided into three categories of grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection and Grounding: ≤10Ω

The factory or laboratory can choose 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 the ground resistance value should be ≤4Ω if all equipment needs to be connected), for example, in 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 above 100级, electronic components with withstand voltage not exceeding 100V), the ground resistance value should be required to be ≤4Ω or higher.

Guangzhou Lihuang Anti-Static 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 for the standard level. Welcome manufacturers and companies to inquire and place orders. Thank you!