Employees (operators) wearing synthetic clothing and moving around easily generate static discharges. Additionally, friction, stirring, and movement of packaging products or handling equipment, as well as air movement 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 disrupt computer systems. The sparks generated by static electricity are sufficient to ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, proper grounding is essential for equipment, containers, and pipelines prone to static electricity 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 smaller the resistance, the faster the current flows, and the higher the level (or safer) of equipment (or grade) that can be protected. Furthermore, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: 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 Work Location: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection Grounding: ≤10Ω

The factory or laboratory can select the 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 producing and processing 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 purity of 100 or higher, electronic components with withstand voltage not exceeding 100V), the grounding 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!