Workers (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, the movement of packaging products or handling equipment, as well as friction and stirring in high-temperature rooms, can also produce static electricity. The static electricity can easily cause electronic components to break down and burn, affect the accuracy of testing 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 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 the level (or safer) of the 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: including working grounding, protective grounding, static electricity grounding, lightning protection grounding, multiple 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 (earth resistance values) are divided into three grades:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication working ground: ≤4Ω

Safety Protection Resistance: ≤4Ω

Static Dissipative Grounding: ≤4Ω

Lightning protection grounding: ≤10Ω

Manufacturers or laboratories can select the appropriate ground resistance value according to their own environmental requirements.

Suggestion: The general factory's grounding resistance should be ≤10Ω (but if all equipment needs to be connected, the grounding resistance should be ≤4Ω). For example, in chemical factories (factories producing hazardous chemicals) and factories that produce and process flammable and explosive gases, the grounding resistance should be required to be ≤4Ω or higher. For electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms above 100-level, with voltage resistance of electronic components not exceeding 100V), the grounding resistance 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 manufacturers and companies to inquire and place orders. Thank you!