During what condition would you typically use casualty power?

During what condition would you typically use casualty power?

• A. During maintenance only
• B. During routine testing
• C. During normal operations
• D. During a power failure

Answer: (D)

Casualty power is emergency electrical power kept ready to take over when the normal power source is lost. It’s used to keep essential equipment—like pumps, controls, and safety systems—operating during a power outage, so operations that rely on electricity can continue or be safely continued. Because it’s an emergency backup, you’d activate casualty power only when the main power fails. It isn’t used during maintenance or routine testing, since those activities are performed with the normal power system or under controlled, non-emergency conditions, and it isn’t needed in normal operations where power is available. The situation that calls for casualty power is a power failure.

Casualty power is emergency electrical power kept ready to take over when the normal power source is lost. It’s used to keep essential equipment—like pumps, controls, and safety systems—operating during a power outage, so operations that rely on electricity can continue or be safely continued. Because it’s an emergency backup, you’d activate casualty power only when the main power fails. It isn’t used during maintenance or routine testing, since those activities are performed with the normal power system or under controlled, non-emergency conditions, and it isn’t needed in normal operations where power is available. The situation that calls for casualty power is a power failure.