Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the movement of packaging products or周转 equipment and the friction, stirring in high-temperature rooms can also produce static. The static 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 from static can also ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, proper grounding is required for equipment, containers, and pipelines prone to static generation, as well as for production processes that are prone to static. Grounding refers to the electrical connection between a specific point in a system, device, or equipment and the local ground (earth). Thus, the lower the resistance, the faster the current flows, and the higher the level (or safer) of protection for the equipment (or grade). Moreover, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: including working grounding, protective grounding, anti-static 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 grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection Grounding: ≤10Ω

Manufacturers or laboratories can choose their appropriate ground resistance value based on their specific environmental requirements.

Suggestion: The ground resistance value for a general factory should be ≤10Ω (but for all equipment to be connected, the ground resistance value should be ≤4Ω). For example, in chemical factories (manufacturers of hazardous chemicals) and factories producing 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 with 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 that can provide technical references based on your production or safety environment, and recommend the appropriate resistance value for the standard grade. Welcome all manufacturers and companies to consult and place orders. Thank you!