Voltage levels refer to the amount of electrical potential difference between two points in a circuit. They are measured in volts (V) and can be categorized into low, medium, and high voltage. Low voltage typically ranges from 0 to 1,000 volts, while medium voltage spans from 1,000 to 35,000 volts. High voltage is considered to be above 35,000 volts. Understanding voltage levels is crucial for the safe and efficient operation of electrical systems. Different applications, such as residential electrical systems or industrial power distribution, require specific voltage levels to function properly. Proper management of these levels helps prevent electrical hazards and ensures reliable energy supply.