104 Questions
Which type of LED luminaires must be identified as Type IC when installed in contact with thermal insulation?
Type IC
What happens if a listed Type IC recessed luminaire is mislamped and overheats?
It automatically shuts off
In what type of construction can luminaires marked 'FOR USE IN NON-FIRE-RATED' be installed?
Non-fire-rated construction
According to the text, what is the minimum wire size for pendant conductors with intermediate or candelabra-base lampholders?
18 AWG
According to the text, how long should pendant conductors be twisted together if they are not cabled in a listed assembly?
900 mm
According to the text, what type of cord is required for cord-connected showcases?
Hard-service cord
According to the text, what is the minimum size of equipment grounding conductor required for cord-connected showcases?
Size 12
According to the text, how should replacement luminaires be connected to an equipment grounding conductor?
All of the above
According to the text, how should wiring on or within luminaires be arranged?
All of the above
According to the text, how should luminaires be wired in terms of polarization?
The screw shells of lampholders should be connected to the same luminaire or circuit conductor or terminal
Which type of incandescent lamp base is suitable for use if rated over 300 watts?
Special bases
What are the categories for fluorescent ballast enclosures according to UL?
Indoor, outdoor, and weatherproof
Where are HID ballasts suitable for use?
All of the above
What is the maximum temperature that adjacent combustible material should be subjected to in recessed luminaires?
90°C (194°F)
Which of the following conditions must apply in order for a disconnecting means to not be required for every luminaire in a building area?
More than one luminaire is installed in the building area
When connected to multiwire branch circuits, what conductors should the disconnecting means simultaneously break?
All the supply conductors including the grounded conductor
Where should the disconnecting means be located for a luminaire?
Outside the luminaire
What conductors should be disconnected by the disconnecting means for a luminaire?
All the supply conductors including the grounded conductor
According to the UL Luminaires Marking and Application Guide, 2016, how are luminaires listed for use as raceways marked?
"Suitable for Use as a Raceway" and also with the maximum number, size, and type of conductor permitted in a raceway
According to 410.62(C)(1)(c), what is permitted to supply the luminaires in place of a grounding-type attachment plug?
A listed manufactured wiring system connector that is part of a fabricated assembly
According to 410.62(C)(1), where must the cord be located if a luminaire is cord connected?
Directly below the outlet or busway
According to 410.64, when can luminaires be used as a raceway for circuit conductors?
When they comply with 410.64(A), (B), or (C) and are listed and marked for this use
According to the text, luminaires designed for end-to-end connection to form a continuous assembly, or luminaires connected together by recognized wiring methods, shall be permitted to contain the conductors of a 2-wire branch circuit, or one multiwire branch circuit, supplying the connected luminaires and shall not be required to be listed as a raceway. One additional 2-wire branch circuit separately supplying one or more of the connected luminaires shall also be permitted.
Only one additional 2-wire branch circuit is permitted for luminaires connected together
According to the text, feeder and branch-circuit conductors within 75 mm (3 in.) of a ballast, LED driver, power supply, or transformer shall have an insulation temperature rating not lower than 90°C (194°F), unless supplying a luminaire marked as suitable for a different insulation temperature.
Feeder and branch-circuit conductors must have an insulation temperature rating lower than 90°C (194°F)
According to the text, where control conductors are spliced, terminated, or connected in the same luminaire or enclosure as the branch-circuit conductors, the field-connected control conductor shall not be of a color reserved for the grounded branch-circuit conductor or the equipment grounding conductor.
Field-connected control conductors cannot be of a color reserved for the grounded branch-circuit conductor or the equipment grounding conductor
According to the text, fluorescent or LED luminaires that utilize double-ended lamps and contain ballast(s) or LED driver(s) that can be serviced in place shall have a disconnecting means either internal or external to each luminaire.
Fluorescent or LED luminaires require a disconnecting means either internal or external to each luminaire
According to the text, where should a germicidal irradiation system not be installed?
In a dwelling
According to the text, what is the scope of Article 411?
It covers low voltage lighting systems and their associated components
According to the text, what should be provided by the system manufacturer or clearly specified in the installation instructions?
All system components
According to the text, what type of luminaires are exempt from the thermal protection requirement?
Egress lighting
According to the text, what type of ballast is not required to be thermally protected in a fluorescent luminaire with straight tubular lamps?
Simple reactance ballast
According to the text, what is the maximum allowable wattage of lamps for incandescent lamp luminaires?
Not specified in the text
According to the text, what type of transformers shall not be used in luminaires?
Oil-filled transformers
According to the text, what is the maximum load that can be connected to a lighting track?
The rating of the track
According to the text, where is lighting track not permitted to be installed?
In show windows
According to the text, how should fittings be connected to lighting track?
They should be securely fastened
According to the text, what is heavy-duty lighting track?
Lighting track exceeding 20 amperes
According to the text, what is the maximum length of tap conductors running from the luminaire terminal connection to an outlet box?
1.8 m (6 ft)
According to the text, where should luminaires recessed in ceilings, floors, or walls not be used to access?
Outlet boxes
According to the text, what is the minimum length of Type AC or MC cable that tap conductors running from the luminaire terminal connection to an outlet box should be?
450 mm (18 in.)
According to Article 547 of the NEC, what are the requirements for agricultural buildings?
Flexible connection to branch circuits and between luminaires
What is the purpose of horticultural lighting equipment?
To promote plant growth with specific wavelengths of light
According to 410.178, when is flexible cord permitted for horticultural lighting equipment?
All of the above
What are the requirements for luminaires intended to emit germicidal irradiation?
All of the above
Which type of ballast is more energy efficient than single- or three-lamp ballasts?
Two-lamp ballast
What is the maximum voltage that the secondary circuit of a transformer can have under any load condition?
15000 volts
Where should transformers be located to prevent adjacent combustible materials from being subjected to excessive temperatures?
As close to the lamps as possible
What is the minimum insulation temperature rating required for feeder and branch-circuit conductors within 75 mm (3 in.) of a ballast, LED driver, power supply, or transformer?
90°C (194°F)
According to the text, what type of lamps are suitable for use in open luminaires?
Type O lamps
According to the text, what is the maximum open-circuit voltage allowed for equipment installed in dwelling occupancies?
300 volts
According to the text, what is considered as combustible low-density cellulose fiberboard?
Sheets, panels, and tiles with a density of 320 kg/m3 (20 lb/ft3) or less
According to the text, what type of luminaires require auxiliary equipment to be enclosed in accessible, permanently installed metal cabinets?
Wired luminaire sections
According to the text, what is the maximum allowable wattage of lamps for incandescent lamp luminaires?
300 watts
According to the text, what is the maximum open-circuit voltage allowed for equipment installed in dwelling occupancies?
120 volts
According to the text, where should transformers be located to prevent adjacent combustible materials from being subjected to excessive temperatures?
In a well-ventilated area
According to Article 411, what is the maximum operating voltage allowed for low-voltage lighting systems and their associated components?
30 volts ac or 60 volts dc
According to Article 411, what are the components that can be assembled to create a low-voltage lighting system?
Low-voltage luminaires, power supply, luminaire fittings, and suitably rated cord or cable
According to Article 411, what is the scope of this article?
Low-voltage interior and exterior (landscape) lighting systems
According to the text, where should the GFCI be located for vending machines?
Within the supply cord not more than 300 mm (12 in.) from the attachment plug
According to the text, what is the minimum branch-circuit rating for a continuous load appliance?
125 percent of the marked rating
According to the text, what is the minimum ampacity of branch-circuit conductors for motor-operated appliances without a marked rating?
In accordance with Part II of Article 430
According to the text, what is the maximum demand for overcurrent protection for household-type appliances with surface heating elements?
50 amperes
Which type of heating appliances shall have the heating elements subdivided?
Appliances rated more than 48 amperes
What is the maximum load that each subdivided load in heating appliances shall not exceed?
48 amperes
What is the maximum protection for each subdivided load in heating appliances?
60 amperes
What are the requirements for commercial kitchen and cooking appliances using sheathed-type heating elements?
They shall be subdivided into circuits not exceeding 120 amperes and protected at not more than 150 amperes
Which of the following is true about low-voltage lighting systems according to Article 411?
They can operate up to 60 volts dc without grounding
In wet locations where contact with the lighting system might occur, what is the maximum voltage limit according to the text?
15 volts ac
According to Article 411, how should exposed bare conductors and current-carrying parts be installed?
Indoor installations only
According to the text, what distinguishes Article 411 from Article 410?
The voltage limitation and isolation requirement
According to the text, what is the minimum length of the cord for an electrically operated in-sink waste disposer?
Between 450 mm (18 in.) and 900 mm (36 in.)
According to the text, where should the receptacle for a trash compactor be located?
In the space occupied by the appliance or adjacent thereto
According to the text, what is the maximum length of the cord for a built-in dishwasher?
Between 0.9 m (3 ft) and 2.0 m (6.5 ft)
According to the text, where should the receptacle for a built-in dishwasher be located?
In the space adjacent to the space occupied by the dishwasher
According to 422.17, which one of the following conditions must be met in order for range hoods and over-the-range microwave ovens to be permitted to be cord-and-plug-connected?
Receptacles are located to protect against physical damage to the flexible cord.
According to 422.18, which one of the following is a method for supporting ceiling-suspended (paddle) fans?
All of the above
According to 422.19, what is the purpose of providing sufficient space in the combined volume of the canopy of ceiling-suspended (paddle) fans and outlet box?
To allow for the installation of conductors and their connecting devices
According to 422.30, what is the requirement for the disconnecting means of each appliance supplied by more than one branch circuit or feeder?
They must be grouped and identified as being the multiple disconnecting means for the appliance.
Which of the following is NOT considered fixed electric space-heating equipment according to the text?
Room air conditioning
What is the maximum amperage rating for branch circuits supplying two or more outlets for fixed electric space-heating equipment in a dwelling unit?
30 amperes
What is the minimum ampacity of the branch-circuit conductor(s) for fixed electric space-heating equipment and any associated motor(s)?
125 percent of the load
What type of heating equipment must be listed and labeled according to the text?
All of the above
According to the text, what is the minimum ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices for heaters rated less than 50 kW?
125 percent of the load served
According to the text, what is the maximum ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices for heaters rated 50 kW or more?
100 percent of the load served
According to the text, what is the requirement for the ampacity of field-wired conductors between the heater and the supplementary overcurrent protective devices for heaters rated 50 kW or more?
100 percent of the load served
Which of the following is true about disconnecting means for motor-operated appliances rated over 1/8 horsepower?
The disconnecting means must comply with 430.109 and 430.110.
According to the text, which of the following is a requirement for cord-and-plug-connected or attachment fitting-connected appliances?
All of the above.
According to the text, where can a cord-and-plug connection be made for a household electric range?
At the rear base of the range, accessible from the front by removal of a drawer.
According to the text, what is the purpose of an approved stand for smoothing irons and other cord-and-plug-connected electrically heated appliances?
To provide a stable base for the appliance
According to 422.47, what is the requirement for storage or instantaneous-type water heaters?
They must be equipped with a temperature-limiting means
According to 422.48, what type of lampholders are permitted for infrared heating lamps rated at 300 watts or less?
Medium-base, unswitched porcelain lampholders
According to the text, what are infrared lamps designed to do?
Produce more heat radiation than light intensity
According to 422.34, where should the other disconnecting means be located in a multifamily dwelling?
On the same floor as the dwelling unit
According to 422.40, what type of appliances are required to have a signal or an integral temperature-limiting device in other than dwelling-type occupancies?
Appliances intended to be applied to combustible material
According to the text, which of the following devices de-energize the supply to the appliance when leakage current exceeds a predetermined value?
Appliance-leakage circuit interrupters (ALCIs)
According to 422.44, how should electric heaters of the cord-and-plug-connected immersion type be constructed and installed?
With current-carrying parts insulated from electrical contact with the substance
According to the text, what is the ampere rating required for the disconnecting means specified in 424.19(A) and (B) for heating equipment supplied by more than one source?
Not less than 125 percent of the total load of the motors and the heaters
According to the text, what is the purpose of grouping and identifying the disconnecting means for heating equipment supplied by more than one source?
To simultaneously disconnect all ungrounded conductors that it controls
According to the text, what is the maximum open-circuit voltage allowed for equipment installed in dwelling occupancies?
600 volts
According to the text, where should the disconnecting means be located for fixed electric space-heating equipment with supplementary overcurrent protection?
Within sight from the supplementary overcurrent protective device(s), on the supply side of these devices
According to the text, what are the conditions for thermostatically controlled switching devices and combination thermostats to serve as both controllers and disconnecting means?
All of the above
According to the text, what are the requirements for switches and circuit breakers used as disconnecting means?
All of the above
According to the text, what is the maximum protection for resistance-type heating elements in electric space-heating equipment?
48 amperes
According to the text, what are the conditions for supplementary overcurrent protective devices for the subdivided loads specified in 424.22(B)?
All of the above
Test your knowledge on lamp safety and regulations with this quiz. Learn about the requirements for lampholders and the limitations on incandescent lamp bases.
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