Employees (operators) wearing synthetic clothing and moving around can easily generate static discharge. Additionally, friction, mixing, 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 short-circuit and burn out, affect the accuracy of detection equipment, and cause computer systems to malfunction. The sparks generated by static electricity are also 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 making an electrical connection between a specific point in a system, device, or equipment and the local ground (earth). Therefore, the smaller the resistance, the faster the current flows, and the higher (or safer) the level of equipment (or safety) that can be protected. Furthermore, good grounding can effectively reduce static noise in computer systems caused by potential changes.

Types of Grounding: Include working grounding, protective grounding, antistatic grounding, lightning protection grounding, multiple grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, and power grounding for electronic equipment, etc.

In compliance with both international and domestic standards: the static grounding resistance values (earth resistance values) are categorized into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication working ground: ≤4Ω

Safety Protection Ground: ≤4Ω

Static Dissipative Grounding: ≤4Ω

Lightning protection grounding: ≤10Ω

Factories or laboratories can select the appropriate grounding resistance value according to 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, in chemical factories (factories producing hazardous chemicals) and factories that produce and process 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 having 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 personnel and construction teams, capable of providing technical references based on your production or safety environment, and suggesting the appropriate resistance value for the standard level. Welcome all manufacturers and companies to inquire and place orders. Thank you!