CLC Codes, Standards & Safety Compliance 2 — Questions and Answers
Question 1: Under NFPA 101 Life Safety Code, which lighting condition must be maintained in an exit access corridor during a power failure?
- Minimum 1 footcandle at floor level (Correct answer)
- Minimum 5 footcandles at floor level
- Minimum 10 footcandles at floor level
- No minimum is required if exit signs are illuminated
Correct answer: Minimum 1 footcandle at floor level
NFPA 101 requires at least 1 footcandle (10.8 lux) at floor level in exit access corridors during emergency conditions.
Question 2: ASHRAE/IES 90.1 automatic lighting control requirements mandate that interior lighting be shut off or reduced in spaces when which condition is detected?
- Occupancy absence for more than 20 minutes
- Daylight levels exceed 30 footcandles
- Both absence of occupancy and sufficient daylight, per space type (Correct answer)
- Only when the HVAC system switches to unoccupied mode
Correct answer: Both absence of occupancy and sufficient daylight, per space type
ASHRAE 90.1 requires both occupancy-sensing shutoff and daylight-responsive controls where applicable, depending on space type and area.
Question 3: Which UL standard specifically covers the safety of LED drivers and power supplies used in luminaire applications?
- UL 8750 (Correct answer)
- UL 1598
- UL 924
- UL 2108
Correct answer: UL 8750
UL 8750 is the Standard for Safety of Light Emitting Diode (LED) Equipment for Use in Lighting Products, covering LED drivers and control gear.
Question 4: In the NEC, Article 410 governs luminaires. Which section specifically addresses luminaires installed in clothes closets and their required clearances?
- Article 410.16 (Correct answer)
- Article 410.2
- Article 410.130
- Article 410.62
Correct answer: Article 410.16
NEC Article 410.16 specifies luminaire types permitted in clothes closets and mandates minimum clearances from storage areas to reduce fire risk.
Question 5: The International Energy Conservation Code (IECC) Lighting Power Density (LPD) compliance path that uses individual space allowances rather than a whole-building wattage budget is called the:
- Space-by-space method (Correct answer)
- Building area method
- Prescriptive trade-off method
- Performance compliance path
Correct answer: Space-by-space method
The space-by-space method assigns LPD values to each individual room type, allowing more precise allocation than the whole-building building area method.
Question 6: Which FCC regulation is most relevant to a lighting consultant specifying wireless lighting control systems in the US?
- FCC Part 15 (unlicensed RF devices) (Correct answer)
- FCC Part 68 (telephone equipment)
- FCC Part 22 (cellular services)
- FCC Part 73 (broadcasting)
Correct answer: FCC Part 15 (unlicensed RF devices)
FCC Part 15 governs unlicensed intentional radiators, covering the wireless transceivers used in Bluetooth, Zigbee, and other wireless lighting control devices.
Question 7: When a luminaire is listed as 'wet location' rated, what does this UL listing permit that a 'damp location' rating does not?
- Direct exposure to weather, rain, and standing water (Correct answer)
- Operation in areas with condensation only
- Installation in shower areas but not outdoor rain exposure
- Use with any lamp type without restriction
Correct answer: Direct exposure to weather, rain, and standing water
Wet location listings permit luminaires to be exposed to rain, sleet, and direct water contact, whereas damp location ratings only allow areas with condensation or indirect moisture.
CLC Codes, Standards & Safety Compliance 2
Under NFPA 101 Life Safety Code, which lighting condition must be maintained in an exit access corridor during a power failure?