Live wire contact causes electric shock and burning—fires caused by defective wiring. You are overloading electrical circuits which are exposed to electrical components.
Electrical safety is essential because hazards such as arc discharge and electric shock can be fatal if exposed. Thankfully, the probability of this happening is relatively minimal. Preventing these dangers, however, requires meticulous administration, attention to detail, and technical expertise.
An electrical hazard exists when a worker can or does make electrical contact with 'live' elements (parts that are ordinarily energized) or items that may have become energized as a result of a failure.
Earthing is utilized to prevent electric shocks. This is accomplished by providing a path (a protective conductor) for a defective current to flow to the Earth. In addition, it triggers the protective device (either a circuit breaker or fuse) to shut off the electric current to the faulty circuit.