Workers (operators) wearing synthetic clothing and moving around can easily generate static discharge. Similarly, the movement of packaging products or equipment, as well as friction and mixing in high-temperature rooms, can also produce static. The static generated can easily cause electronic components to breakdown and burn, affect the accuracy of testing equipment, and disrupt computer systems. The sparks from static can ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, equipment, containers, and pipelines prone to static generation should be properly grounded, and production processes that generate static should also be grounded. Grounding refers to making an 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) the equipment (or rating) that can be protected. Additionally, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding: including working grounding, protective grounding, static dissipation 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 Work Site: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Lightning Protection Grounding: ≤10Ω

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

Recommendation: The ground resistance value for general factories can be required to be ≤10Ω (but should be ≤4Ω if all equipment needs to be connected), for example, in chemical factories (manufacturing hazardous chemicals) and factories producing and processing 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 (cleanroom grade 100 or above, 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 staff and construction teams, capable of providing technical references based on your production or safety environment. We can suggest the appropriate resistance value for the standard level. Welcome manufacturers and companies to consult and place orders. Thank you!