Deck 3: Determining the Required Number of Branch Circuits, Lighting Outlets, Receptacle Outlets

Question 1

How is track lighting load in residences calculated?

A) It is calculated at 150 volt-amperes per each two feet of track.
B) It is calculated at 60 watts per lighting head.
C) It is considered to be part of the general lighting load of 3 volt-amperes per square foot.
D) The method of calculation varies depending on the type of residence.

Answer 1

C

Question 2

The NEC defines a ____ as "the circuit conductors between the final overcurrent device protecting the circuit and the outlet(s)."

A) receptacle outlet
B) branch circuit
C) service-entrance conductor
D) feeder

Answer 2

B

Question 3

List two cases where receptacles may be installed below countertops.

Answer 3

Receptacles may be installed below countertops only:
- where the construction is for the physically impaired, or
- for island and peninsula countertop spaces where the countertop is flat across its entire surface and there is no way to mount a receptacle within 20 in. (500 mm) above the countertop.

Question 4

Wall receptacles in a habitable room must be placed so they are no further than ____ feet from any point along the wall.

A) 3
B) 5
C) 6
D) 12

Question 5

Most public service commissions require that the voltage for residential services be held to ± ____ percent of the nominal voltage as measured at the service point.

A) three
B) five
C) eight
D) ten

Question 6

Explain what is meant by a nominal voltage rating.

Question 7

List the two cases where outdoor receptacles are exempt from GFCI protection.

Question 8

With the exception of ____, the 20-ampere appliance circuits required by NEC are permitted to serve no other loads.

A) clock outlets
B) receptacles that are installed to plug in the cords of gas-fired ranges, ovens, or counter-mounted cooking units
C) receptacles in bathrooms
D) receptacles in a master bedroom

Question 9

What are the outdoor receptacle requirements of a one-family dwelling as specified in NEC 210.52(E)(1)?

Question 10

Explain the difference between a receptacle and a receptacle outlet.

Question 11

Which of the following is NOT included when calculating the usable area of a dwelling to compute the required lighting load?

A) living room
B) crawl space
C) unfinished basement
D) powder rooms

Question 12

Where there are _________________________ or more on an interior stairway, a wall-switch control of the stairway lighting must be provided on each floor level and any level that has an entryway.

Question 13

The general lighting load for a dwelling is based on the ____.

A) total number of rooms
B) city ordinance requirements
C) family lifestyle needs
D) square footage of the dwelling

Question 14

The National Electrical Code requires outdoor receptacles to be ____.

A) AFCI protected
B) GFCI protected
C) on a dedicated circuit
D) b and c

Question 15

What determines the rating of a branch circuit?

A) Branch-circuit wire size
B) Rating of the overcurrent device
C) Length of the circuit
D) Total number of receptacles

Question 16

A continuous load shall not exceed ____ percent of the rating of the branch circuit.

A) 50
B) 80
C) 100
D) 125

Question 17

The minimum lighting load requirement for dwelling units is ____ volt-amperes per square ft (0.093 m³).

A) 2
B) 3
C) 5
D) 10

Question 18

For continuous loads, the branch-circuit rating, the conductors, and the overcurrent device shall not be less than ____ percent of the rating of the equipment.

A) 75
B) 100
C) 125
D) 150

Question 19

In construction of one- and two-family dwellings, the electrical circuits are usually designed by the ____.

A) electrician
B) architect
C) consulting engineer
D) project manager

Question 20

Calculate the minimum number of 15-ampere lighting branch circuits required in a residence of 1,850 square feet.

Question 21

The Code specifies which rooms in a dwelling are required to have switched lighting outlets or switched receptacles. Choose yes (switch required) or no (switch not required) for the following areas:
a.Yes
b.No
Bathroom

Question 22

The Code specifies which rooms in a dwelling are required to have switched lighting outlets or switched receptacles. Choose yes (switch required) or no (switch not required) for the following areas:
a.Yes
b.No
Crawl space (contains equipment that requires servicing)

Question 23

The Code specifies which rooms in a dwelling are required to have switched lighting outlets or switched receptacles. Choose yes (switch required) or no (switch not required) for the following areas:
a.Yes
b.No
Hallway

Question 24

The Code specifies which rooms in a dwelling are required to have switched lighting outlets or switched receptacles. Choose yes (switch required) or no (switch not required) for the following areas:
a.Yes
b.No
Attic (not intended for storage)

Question 25

The Code specifies which rooms in a dwelling are required to have switched lighting outlets or switched receptacles. Choose yes (switch required) or no (switch not required) for the following areas:
a.Yes
b.No
Stairway

Question 26

Receptacles in unfinished basements must be ____________________ protected.