What happens when there is no fuse?

When there is no fuse in an electrical circuit, there's a higher risk of overcurrent, which can lead to overheating and potentially cause damage to the wiring and connected devices. Without a fuse to interrupt the circuit in case of a fault, such as a short circuit, the electrical current can flow unchecked, increasing the likelihood of fires or equipment failure. Essentially, the safety mechanism that protects the system is compromised, posing serious hazards.