Deck 15: Luminaires

Question 1

What are the stipulations relevant to lamps in new energy conservation laws that have been enacted in some states?

Answer 1

The new laws in these states simply require that lamps in permanently installed luminaires:
-have high efficacy rating (high lumens per watt), or
-be controlled by occupancy sensors, or
-have a combination of lamp efficacy, occupancy sensor control, and/or dimmers.
Cord-connected floor or table lamps are not governed by current energy conservation laws. Most fluorescent lamps with energy savings ballasts, compact fluorescent lamps (CFLs), LEDs, and halogen lamps meet this high-efficacy requirement. Conventional incandescent lamps do not.

Question 2

Multiwire branch circuits are defined in NEC® Article 100 as a branch circuit that consists of two or more conductors that have a voltage between them, and a grounded conductor that has equal voltage between it and each ungrounded conductor of the circuit and that is connected to the neutral or grounded conductor of the system.

A) "hot"
B) grounded
C) ungrounded
D) semi-

Answer 2

C

Question 3

Beginning with the 2008 edition of the National Electrical Code, the term luminaire is used exclusively. Previous editions of the NEC® used the term luminaire followed by the term in parentheses.

A) lamp
B) lighting source
C) fixture
D) lightbulb

Answer 3

C

Question 4

Incandescent, open, or lamps in lampholders; pendant luminaires; and pendant lampholders are not permitted in clothes closets.

A) recessed
B) surface-mounted
C) partially open
D) enclosed

Question 5

A(n) branch circuit must supply only line-to-neutral loads if the luminaires are connected line-to-neutral.

A) multiwire
B) regular
C) irregular
D) dual-wire

Question 6

All recessed incandescent luminaires must be equipped with factory-installed thermal protection, unless the luminaire is identified for use and installed in .

A) copper
B) aluminum
C) stainless steel
D) poured concrete

Question 7

For fluorescent and HID luminaires, the volt-ampere allowance is based on the rating of the .

A) ballast
B) filament
C) tubing
D) phosphor

Question 8

The installation of luminaires, lighting outlets, and supports is covered in Article 410 of the NEC®. Article 410 sets forth the basic requirements for the installation, commonly referred to as the " "

A) light-up
B) grounding
C) pre-set
D) rough-in

Question 9

that have the light source completely enclosed are permitted in clothes closets.

A) Incandescent open lamps in lampholders
B) Pendant luminaires
C) Pendant lampholders
D) Surface-mounted or recessed fluorescent luminaires

Question 10

What are the guidelines for recessed incandescent luminaires not marked IC?

Question 11

Recessed luminaires are usually supported by that are attached to the luminaires' rough­in box.

A) screws
B) nails
C) adjustable rails
D) outlet boxes

Question 12

Both Type THWN-2 and Type conductors have an insulation temperature rating of 90 degrees Celsius and generally meet the temperature requirement for connecting luminaires.

A) THW
B) THHN
C) RHW
D) USE

Question 13

For surface-mounted and pendant-hung luminaires, support rods should be placed so that they extend about in. below the finished ceiling.

A) one
B) two
C) three
D) four

Question 14

What are the requirements for multiwire branch circuits?

Question 15

Why are there special requirements for clothes closets?

Question 16

Type luminaires are permitted to be installed in direct contact with thermal insulation.

A) IIC
B) IC
C) RC
D) XC

Question 17

Recessed luminaires have to be securely fastened to the ceiling framing members using bolts, screws, or .

A) tacks
B) rivets
C) grid elements
D) flexible cables

Question 18

It is necessary that the illumination of a building comply with energy codes. These codes usually evaluate the illumination on the basis of the average per square foot (meter) of illumination load.

A) watts
B) volt-amperes
C) lumens
D) candelas

Question 19

Most fluorescent lamps with energy savings ballasts, compact fluorescent lamps (CFLs), LEDs, and halogen lamps meet the high-efficacy requirement. do not.

A) Most fluorescent lamps with energy savings ballasts
B) Conventional incandescent lamps
C) Compact fluorescent lamps
D) Halogen Lamps

Question 20

Describe the rules governing the disconnecting means for fluorescent luminaires.