Which statement about exit signs is true?

Which statement about exit signs is true?

• A. Exit signs must be connected to only the building's normal power supply.
• B. Exit signs must be connected to a reliable power source or emergency power.
• C. Exit signs must be solar-powered only.
• D. Exit signs must be connected to external utility power only.

Answer: (B)

Exit signs must stay illuminated even when the building loses power, so they need a power setup that continues to supply light during an outage. That means they should be connected to a reliable power source or to an emergency power supply (such as a battery backup or generator) that kicks in automatically if normal power fails. If you rely only on the building’s normal power, a power outage could leave the signs dark when visibility is most critical. Solar power by itself isn’t universally required or guaranteed to meet emergency illumination needs, and relying on external utility power alone isn’t reliable during an incident. So the best choice is that exit signs are tied to a reliable power source or emergency power to ensure they remain lit at all times.

Exit signs must stay illuminated even when the building loses power, so they need a power setup that continues to supply light during an outage. That means they should be connected to a reliable power source or to an emergency power supply (such as a battery backup or generator) that kicks in automatically if normal power fails. If you rely only on the building’s normal power, a power outage could leave the signs dark when visibility is most critical. Solar power by itself isn’t universally required or guaranteed to meet emergency illumination needs, and relying on external utility power alone isn’t reliable during an incident. So the best choice is that exit signs are tied to a reliable power source or emergency power to ensure they remain lit at all times.