Final answer:
To prevent burns to patients in the operating room, circuit breakers and fuses should be used, along with a three-wire system and regular inspection and maintenance of electrical devices.
Step-by-step explanation:
To prevent the risk of burns to patients in the operating room, several measures need to be taken with electrical devices. First, circuit breakers and fuses should be used to interrupt excessive currents and prevent thermal hazards. Second, a three-wire system should be employed, utilizing live/hot, neutral, and earth/ground wires, with the neutral wire and appliance case grounded. Finally, regular inspection and maintenance should be conducted to ensure the proper functioning of electrical devices.