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 mixing in high-temperature rooms, can produce static electricity. This static can easily cause electronic components to short-circuit and burn out, affecting the accuracy of detection equipment and instruments, and can also disrupt computer systems. The sparks from static electricity are also sufficient to ignite and explode flammable and explosive gases like natural gas, oil, and alcohol. Therefore, equipment, containers, and pipes that are prone to static electricity generation must be properly grounded, as must production processes prone to static. Grounding refers to the electrical connection between a specific point in a system, device, or equipment and the local earth (ground). Therefore, the lower the resistance, the faster the current flows, and the higher the level (or safer) of the equipment (or grade) that can be protected. Moreover, 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, repeated grounding, equipotential grounding, shielding grounding, signal grounding for electronic equipment, power grounding for electronic equipment, etc.

According to 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 Ground: ≤4Ω

Static Dissipative Grounding: ≤4Ω

Lightning Protection and Grounding: ≤10Ω

Manufacturing plants or laboratories can choose an appropriate grounding resistance value based on their specific environmental requirements.

Recommendation: The ground resistance value for general factories can be required to be ≤10Ω (but it 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 (cleanrooms of 100 grade 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 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 inquire and place orders. Thank you!