Meaning | In the short-circuit the voltage at the fault point decreases to zero and current of irregular high value flow through the faulty point of the network. | The overload means that load greater than the desired value have been imposed on the system. |
Voltage | Zero | The voltage becomes low, but cannot be zero. |
Current | High | Low as compared to short circuit. |
Occur | It occurs when the neutral and live wire touch each other. | It occurs when a large number of devices are joint in a single socket. |