Question 1

How is track lighting load in residences calculated?

Accepted Answer

C

Question 2

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

Accepted Answer

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

Question 3

List two cases where receptacles may be installed below countertops.

Accepted Answer

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.

Accepted Answer

According to the National Electrical Code (NEC), wall receptacles in habitable rooms must be installed so that no point along the floor line in any wall space is more than 6 feet, measured horizontally, from an outlet in that space. This is often referred to as the "6-foot rule."

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.

Accepted Answer

Most public service commissions require that the voltage for residential services be held to ± five percent of the nominal voltage as measured at the service point. This is to ensure that appliances and electronics in the home work properly and safely.

Question 6

Explain what is meant by a nominal voltage rating.

Accepted Answer

The answer of Explain what is meant by a nominal...

Question 7

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

Accepted Answer

The answer of List the two cases where outdoor receptacles...

Question 8

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

Accepted Answer

Clock outlets are permitted to be served by 20-ampere appliance circuits.

Question 9

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

Accepted Answer

The answer of What are the outdoor receptacle requirements of...

Question 10

Explain the difference between a receptacle and a receptacle outlet.

Accepted Answer

The answer of Explain the difference between a receptacle and...

Question 11

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

Accepted Answer

The usable area of a dwelling includes all habitable spaces such as living rooms, bedrooms, kitchens, and powder rooms. However, crawl spaces and unfinished basements are not considered habitable spaces and are therefore not included in the calculation of the required lighting load.

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.

Accepted Answer

The answer of Where there are _________________________ or more on...

Question 13

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

Accepted Answer

The general lighting load for a dwelling is based on the square footage of the dwelling. This is because the larger the space, the more lighting fixtures and bulbs are needed to adequately light the area.

Question 14

The National Electrical Code requires outdoor receptacles to be ____.

Accepted Answer

The National Electrical Code requires outdoor receptacles to be GFCI protected. This is a safety measure to prevent electrocution in wet or damp conditions. While a dedicated circuit is often recommended for outdoor outlets, it is not required by the NEC. AFCI protection is required for certain areas in the home, but not specifically for outdoor receptacles.

Question 15

What determines the rating of a branch circuit?

Accepted Answer

The rating of a branch circuit is determined by the rating of the overcurrent device, which is usually a circuit breaker or fuse. The wire size, length of the circuit, and number of receptacles are important factors to consider when designing a branch circuit, but they do not determine the rating of the circuit.

Question 16

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

Accepted Answer

According to NEC 210.19(A)(1), a continuous load shall not exceed 80 percent of the rating of the branch circuit.

Question 17

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

Accepted Answer

The minimum lighting load requirement for dwelling units according to the National Electrical Code (NEC) is 3 volt-amperes per square foot.

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.

Accepted Answer

According to NEC 210.20(A), "Rating or Setting of Overcurrent Devices. Branch-circuit conductors shall be permitted to be protected against overcurrent in accordance with their ampacities specified in 310.15, or as specified in 240.4 and 240.5. Conductors shall be protected at their ampacity as specified in 310.15, unless otherwise permitted or required in 240.4 through 240.6. In no case shall the ampacity of a conductor be less than the rating of the branch circuit overcurrent device." The exception to this rule is for continuous loads, where the branch-circuit rating, the conductors, and the overcurrent device shall not be less than 125% of the rating of the equipment. Therefore, the correct answer is C.

Question 19

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

Accepted Answer

Electrical circuits in one- and two-family dwellings are typically designed by the electrician who will also install the wiring and related equipment. The architect, consulting engineer, and project manager may have input in the design process, but the electrician is ultimately responsible for the circuit design.

Question 20

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

Accepted Answer

The answer of Calculate the minimum number of 15-ampere lighting...

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

How is track lighting load in residences calculated?

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

List two cases where receptacles may be installed below countertops.

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

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.

Explain what is meant by a nominal voltage rating.

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

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

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

Explain the difference between a receptacle and a receptacle outlet.

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

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.

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

The National Electrical Code requires outdoor receptacles to be ____.

What determines the rating of a branch circuit?

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

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

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.

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

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

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

How is track lighting load in residences calculated?

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

List two cases where receptacles may be installed below countertops.

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

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.

Explain what is meant by a nominal voltage rating.

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

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

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

Explain the difference between a receptacle and a receptacle outlet.

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

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.

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

The National Electrical Code requires outdoor receptacles to be ____.

What determines the rating of a branch circuit?

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

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

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.

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

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

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