When should artificial respiration be initiated for a train operator who has suffered an electric shock?

Initiating artificial respiration for a train operator who has suffered an electric shock is critical in a situation where the operator is unconscious and not breathing. If the individual is unresponsive and shows no signs of breathing, immediate action is required to prevent brain damage or death. Delaying this life-saving intervention may result in irreversible harm, as oxygen supply to the brain is essential following an incident like electric shock.

Artificial respiration works by providing the necessary oxygen directly to the lungs, thereby maintaining blood oxygen levels and enabling continued circulation until professional medical assistance arrives. This proactive response can significantly improve the chances of recovery and reduce potential long-term complications associated with hypoxia (lack of oxygen).

Other contexts—such as waiting for medical help to arrive or waiting for the operator to regain consciousness—would unnecessarily delay critical care and could endanger the individual's life further. Thus, taking immediate action when the operator is unconscious and not breathing is the correct course of action.