Electrical equipment can pose serious risks if not handled properly, with the most common danger being electric shock and electrical injuries. Electric shock occurs when an electric current passes through the entire body, causing severe internal damage, while electrical injury refers to localized harm such as burns or tissue damage. Among these, electric shock is the most dangerous because it can lead to life-threatening conditions. The effects of electric current on the human body include burns, tissue destruction, and electrolysis of bodily fluids like blood, which can stimulate the nervous system. The severity of the injury depends on several factors: the amount of current passing through the body, the duration of exposure, and the individual's physical condition. Currents above 0.05 amps can be dangerous, and currents over 0.1 amps may result in death. The longer the exposure, the greater the risk. For example, even a current of 0.015 amps can make it difficult for a person to let go of the source, increasing the chance of prolonged contact. The human body has natural resistance, especially the skin, which can range from about 1,000 to 180,000 ohms. However, this resistance drops significantly when the skin is wet, allowing more current to pass through and increasing the danger. In general, voltages below 45 volts are considered relatively safe, which is why safety voltages—such as those used in safety lights—should remain under that threshold. Common causes of electric shocks include working on damaged equipment like motors, wires, or switches, touching exposed or worn-out wires, improper or absent grounding, and lacking proper protective gear. To prevent accidents, it’s crucial to follow strict safety protocols when using electrical devices. In addition to following technical safety rules, users should keep the following in mind: (1) If the insulation on a wire is damaged, do not use it and ensure it is properly insulated. (2) Always inspect electrical equipment before use. (3) When turning switches on or off, do so quickly and avoid facing them directly; wear appropriate protection if needed. (4) When checking the temperature of a motor housing, use the back of your hand instead of your palm to avoid being pulled into the device by electric suction. (5) Never attempt to repair or tamper with electrical equipment unless you are trained and authorized. (6) Avoid cleaning electrical devices with wet hands or damp cloths to prevent accidental shocks. By understanding these risks and taking necessary precautions, we can significantly reduce the chances of electrical accidents and ensure safer operation of all electrical systems.
Ethernet switch,Desktop switch,Gigabit Switch,Industrial Switch,TP link switch
Dongguan Jingling Communication Technology Co., Ltd. , https://www.jlpcba.com