Employees (operators) wearing synthetic clothing and moving around can easily generate static discharges. Additionally, static can be produced through friction, mixing, and movement of packaging products or equipment, as well as air friction in high-temperature rooms. This static 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 from static can ignite and explode flammable gases like natural gas, oil, and alcohol. Therefore, proper grounding is essential for equipment, containers, and pipelines prone to static generation, as well as for production processes that are susceptible 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 lower the resistance, the faster the current flows, and the higher the level (or safer) of protection for the equipment (or grade). Moreover, good grounding can effectively reduce static noise in computer systems caused by potential variations.

Types of grounding:可分为work grounding, protective grounding, antistatic grounding, lightning protection grounding, repeated 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 Worksite: ≤4Ω

Safety Protection Ground: ≤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.

Suggestion: The general factory's ground resistance should be ≤10Ω (but it should be ≤4Ω when all equipment is connected, especially for facilities like chemical plants producing hazardous chemicals and factories producing and processing flammable and explosive gases, where the ground resistance should be ≤4Ω or higher. For electronic factories, semiconductor factories, inspection laboratories, and computer systems (cleanrooms above 100级, with electronic components having a withstand voltage not exceeding 100V), the ground resistance should 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!