Which of the following best defines isolation in electrical systems?

Isolation in electrical systems refers to the practice of separating components or systems to ensure safety, facilitate maintenance, or protect equipment and personnel from potential hazards. This separation can involve disconnecting power sources or isolating specific equipment to prevent accidental energization while maintenance work is being performed. By implementing isolation, technicians can safely access and service equipment without the risk of electric shock or equipment malfunction.

The other options do not accurately capture the essence of isolation in electrical systems. Combining systems for efficiency focuses on improving operational performance rather than safety. Integrating technologies deals with uniting diverse systems or components, which is contrary to the concept of separation. Regulating power distribution pertains to managing the flow of electrical energy rather than isolating components for safety or maintenance. Hence, the definition that best encapsulates isolation is the one focused on separating for safety or maintenance.