Several Methods of Static Electricity Grounding
In electronics manufacturing plants, all equipment that generates static electricity must be reliably grounded. To prevent static charge accumulation on equipment and personnel from reaching dangerous potentials, anti-static flooring is used in key production areas. This type of flooring contains a network of copper wires, which form electrical pathways for static electricity conduction. As part of the electrical design, appropriate grounding terminals should be pre-installed on the building columns in the space where the anti-static flooring is located. After the flooring is installed, the metal wires within the anti-static flooring are connected to these grounding terminals. Furthermore, the grounding terminal must be connected to the grounding electrode through the main reinforcing bars within the column, allowing static electricity to flow from the grounding terminal along the main reinforcing bars to the grounding electrode.
**Hard Grounding:** Connecting an object directly or through a low-impedance connection to the earth.
**Soft Grounding:** Connecting an object to the earth through a sufficiently high impedance connection to limit the current to a safe level in the event of an electric shock.
Direct grounding: A type of grounding that connects a metal conductor to the earth through conductive bonding, bringing the conductor's potential close to the earth's potential.
Indirect grounding: A type of grounding where external electrostatic conductors and sub-conductors are electrically grounded by tightly connecting all or part of their surfaces to a grounded metal conductor, using these metals as grounding electrodes.
Bridging grounding: A type of grounding that uses mechanical or chemical methods to structurally fix two or more insulated metal conductors together, creating a low-impedance path for power flow before grounding.
A separate electrostatic ground wire cannot be shared with equipment grounding (as equipment malfunctions may cause reverse electrostatic discharge) nor can it be used with lightning protection grounding (as this could attract lightning strikes).