Static grounding terminal box

Employees (operators) wearing synthetic clothing and moving around easily generate static discharge. Additionally, friction, stirring, 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 break down and burn, affecting the accuracy of detection equipment and instruments, and can also cause computer systems to malfunction. The sparks from static electricity are also sufficient to ignite and explode flammable and explosive gases like 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. Grounding refers to the 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) of equipment (or grade) that can be protected. Moreover, good grounding can effectively reduce static noise in computer systems caused by potential changes.

Types of grounding: including 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.

Based on international and domestic standards, the resistivity values of electrostatic grounding resistors (ground resistivity) are divided into three categories:

        ①.≤1Ω; ②.≤4Ω; ③.≤10Ω; 

General Requirements:

Communication Worksite: ≤4Ω

Safety Protection Resistance: ≤4Ω

Anti-static grounding: ≤4Ω

Surge Protection and Grounding: ≤10Ω

Factories or laboratories can select their suitable grounding resistance values according to their specific environmental requirements.

Recommendation: The ground resistance value for general factories can be required to be ≤10Ω (but it should be ≤4Ω when all equipment is 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 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 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 all manufacturers and companies to inquire and place orders. Thank you!