Which of the following disasters can be avoided by employers installing earth leakage circuit breakers on temporary electrical equipment?

The installation of earth leakage circuit breakers (ELCBs) is a critical safety measure that helps prevent electrification, which refers to electric shock or electrocution. ELCBs work by detecting discrepancies between the live and neutral wires in an electrical circuit, which indicates a leakage current could be flowing through a person or an unauthorized conductive path to the ground. When such a leakage is detected, the ELCB quickly disconnects the electrical supply, significantly reducing the risk of serious injury or fatality from electric shocks.

While fires can also be related to electrical faults, they are typically caused by prolonged electrical overloads or short circuits, which may not be effectively mitigated by ELCBs alone. Falls from heights and mechanical failures are associated with other workplace hazards that ELCBs do not address. Thus, the correct answer reflects the primary role of earth leakage circuit breakers in enhancing electrical safety and preventing electrification.