In which line should a fuse be placed for safety?

A fuse should be placed in the hot line for safety because it is the line that carries the current from the power source to the appliance or device. By placing the fuse in the hot line, it can effectively interrupt the flow of electricity in case of an overload or short circuit, protecting the device and reducing the risk of electrical fires or damage.

If a fuse were placed in the neutral or ground lines, it would not provide the same level of protection. The neutral line serves as a return path for current and is typically at ground potential, so a fuse here would not disconnect the power supply to the device if an overcurrent occurs. Likewise, placing a fuse in the ground line does not make sense because the ground is a safety measure designed to prevent electrical shock and does not carry current under normal operations. Therefore, placing a fuse in the hot line is essential for ensuring safety and maintaining proper electrical function.