Which of the following statements about control circuit devices is true?

Control circuit devices are essential components in electrical systems, as they manage the operation of electrical equipment. However, relying solely on these devices for deenergizing circuits or equipment poses significant safety risks. This is primarily due to the fact that control circuit devices can fail or malfunction, which may lead to unexpected energization of equipment.

Using control circuit devices exclusively as the means for deenergizing circuits could result in an inability to ensure the complete isolation of electrical energy, which is critical during maintenance or repair work. The safest practice involves implementing multiple methods of deenergization to guarantee that no electrical energy can unexpectedly flow, thereby protecting personnel from potential electric shock or injury.

In a safe work environment, control circuit devices should complement other safety measures—such as lockout/tagout procedures—that provide the assurance needed when service or maintenance tasks are performed. Thus, the recommendation is that control circuit devices should not be the only method used for deenergizing equipment. By adhering to this principle, workers can maintain a higher standard of safety while working with electrical systems.