What happen if a 13A fuse is used instead of a 5A fuse?

Using a 13A fuse instead of a 5A fuse can pose significant safety risks. The 13A fuse allows a higher current to flow through the circuit, which could lead to overheating of wires and potentially cause a fire if the connected device is designed for lower current. This can damage the appliance and compromise electrical safety, as the fuse will not blow in case of an overload, defeating its purpose of protecting the circuit. Always use the appropriate fuse rating to ensure safe operation.