Grounding wire clamp is a wire specially used in electrical systems to connect the metal shell of the equipment to the earth. It is usually connected to the metal parts of the equipment at one end and the underground grounding body at the other end. Grounding wire clamp is a way of electrical protection.
When the wires inside the electrical appliances are aging and the insulation layer is damaged, the current will rush to the metal shell. At this time, the grounding wire clamp will directly introduce the leakage current into the ground, causing the shell voltage to drop to a safe range. For example, when a refrigerator compressor leaks electricity, the grounding wire clamp can conduct more than 99% of the leakage current away within 0.1 seconds to avoid electric shock when the human body comes into contact with the shell.
In thunderstorm weather or when the power grid fluctuates, the grounding wire clamp can quickly release the static electricity and induced voltage accumulated by the equipment. Precision electrical appliances such as host computers and microwave ovens, if they are not grounded for a long time, static electricity may penetrate the circuit chip, causing the equipment to crash frequently.
When severe leakage occurs, the grounding wire clamp will quickly trip the leakage protector in the circuit and cut off the power supply. Data show that for circuits with grounding wire clamp, the response speed of the leakage protector is 5 times faster than when there is no grounding, which can effectively prevent fire and equipment burning.
After understanding the role of grounding wire clamp, let's take a look at the four hazards of not installing grounding wire clamp.
If the preformed grounding wire is not installed, the risk of electric shock will increase sharply. According to data statistics, 68% of household electric shocks are due to equipment leakage and there is no preformed grounding wire. For example, when the liner of an electric water heater leaks electricity, the absence of a preformed grounding wire will cause the shell to be charged. When the human body comes into contact with the water and the shell to form a circuit during bathing, the voltage can be fatal instantly.
Failure to install preformed grounding wire will cause the life of the equipment to be shortened. High-power electrical appliances such as air conditioners and washing machines, if there is no preformed grounding wire, the inductive electricity generated during operation will erode the internal components.
Failure to install preformed grounding wire can easily cause electrical fires. The leakage current discharges through the equipment shell and the air for a long time, which may ignite the surrounding combustibles. For example, in winter, the electric heater leaks without grounding, and the continuous discharge ignites the curtains, which can cause a fire and cause significant losses.
Failure to install the preformed grounding wire may cause the lightning protection ability to fail. Lightning rods and lightning arrester all need to be used through the preformed grounding wire to play a role. If the home circuit is not grounded, after the lightning hits the outdoor circuit during a thunderstorm, the high-voltage current will directly flow into the indoor electrical appliances, causing mass damage to TVs, refrigerators and other equipment.
Many people think that equipment does not need to be grounded if it has an insulating layer, but the insulating layer will age over time. Others use zero wire instead of preformed grounding wire, which will cause the equipment shell to be directly charged with 220V when the zero wire is disconnected, which is more dangerous. From household sockets to industrial machine tools, preformed grounding wire is a safety guarantee that cannot be omitted or replaced.