Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the friction, stirring, and movement of packaging products or周转 equipment 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 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 the 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: including working grounding, protective grounding, static dissipative grounding, lightning protection grounding, multiple grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, power grounding for electronic equipment, etc.

According to international and domestic standards: The static grounding resistance values (ground resistance values) are divided into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety protection resistance: ≤4Ω

Static Dissipative Grounding: ≤4Ω

Surge Protection and Grounding: ≤10Ω

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

Suggestion: The general factory's grounding resistance should be ≤10Ω (but it should be ≤4Ω when all equipment is connected, especially for chemical plants producing hazardous chemicals or factories processing flammable and explosive gases, where the grounding resistance should be ≤4Ω or higher). For electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms of 100 grade or higher, with electronic components having withstand voltages not exceeding 100V), the grounding resistance should be ≤4Ω or higher.

Guangzhou Lixiang Antistatic Technology Co., Ltd. has years of experience in the construction and renovation of static grounding and indoor wiring systems. We have professional technical personnel and construction teams, ready to provide technical references based on your production or safety environment. We can suggest the appropriate resistance value for the standard grade. Welcome all manufacturers and companies to inquire and place orders. Thank you!