What is the difference between heavy and light current in electrical engineering?

In electrical engineering, heavy current refers to high-power electrical systems typically used in power generation and distribution, while light current refers to low-power electrical systems used in communication and electronics. Heavy current systems operate at higher voltages and currents, requiring larger conductors and safety precautions. Light current systems operate at lower voltages and currents, focusing on signal transmission and processing with smaller components and lower power consumption.