High voltage refers to electrical energy at a level significantly above standard household voltage, typically above 1000 volts AC or 1500 volts DC. In cybersecurity and electronics, high voltage is often used to power specialized devices such as cloud chambers for particle detection or electric mosquito swatters. High voltage poses a significant safety risk, as it can cause severe injury or death if proper precautions are not taken. While not directly a cybersecurity threat, understanding high voltage is important when securing physical infrastructure that includes sensitive or dangerous electrical equipment.