Emergency & Exit Lighting Standards Flashcards

Which code sets the minimum requirements for exit sign letter height in the United States?

Answer: NFPA 101 Life Safety Code

NFPA 101 Life Safety Code specifies that exit sign letters must be at least 6 inches high with a stroke width of at least 3/4 inch.

What is the maximum viewing distance at which a 6-inch letter exit sign must be legible per NFPA 101?

Answer: 100 feet

NFPA 101 specifies that exit signs with 6-inch letters must be legible from a distance of 100 feet.

Photoluminescent exit signs gain their visibility by:

Answer: Absorbing ambient light energy and re-emitting it in darkness

Photoluminescent signs absorb visible light during normal conditions and re-emit stored energy as a glow when ambient light is lost.

Under NEC Article 700, an automatically started generator used for emergency power must reach full voltage and frequency within how many seconds of loss of normal power?

Answer: 10 seconds

NEC Article 700 requires emergency generators to attain full voltage and frequency within 10 seconds of normal power failure.

A 'Class M' emergency luminaire classification indicates what battery technology?

Answer: Nickel-cadmium

UL 924 Class M designation refers to emergency luminaires using nickel-cadmium (Ni-Cd) battery technology.

Which area classification typically exempts a space from requiring emergency lighting under NFPA 101?

Answer: A storage room with an occupant load of one

NFPA 101 exempts spaces with very low occupant loads, such as single-occupant rooms, from mandatory emergency lighting.

During a monthly functional test of battery-powered emergency lighting, what is the minimum duration for which the unit must operate?

Answer: 30 seconds

NFPA 101 requires monthly tests to verify emergency lighting operates for a minimum of 30 seconds.