Question 1

When tabulating materials, take special note of long runs of raceway or cable and determine whether ____ is a problem. This can mean an increase in conductor and/or raceway size.

Accepted Answer

Voltage drop is a concern in long runs of raceway or cable because it can lead to insufficient voltage at the point of use, necessitating an increase in conductor and/or raceway size to mitigate the issue.

Question 2

A washer-dryer rated for 4000 VA at 208Y/120 volts single-phase must have a branch-circuit ampacity of at least ____ amperes.

Accepted Answer

The branch-circuit ampacity is calculated by dividing the power rating of the appliance (in this case, 4000 VA) by the voltage level (208 volts). Thus, 4000 VA / 208 volts = 19.23 amperes. According to the National Electrical Code (NEC), the next highest standard overcurrent protection device rating (after the calculated value) is used, which means a 20-ampere circuit is required.

Question 3

In the computer room example in this chapter, the grounding terminal of each of the special receptacles is connected to a(n)____.

Accepted Answer

The grounding terminal of each of the special receptacles in the computer room example is connected to an insulated equipment grounding conductor, ensuring a safe path for electrical faults.

Question 4

​Describe basic water heater specifications and those of the beauty salon example in this chapter, and explain the role the electrical contractor in this area.

Accepted Answer

The answer of ​Describe basic water heater specifications and those...

Question 5

​In the water heater installation example in this chapter, what is the meaning of temperature limiting?

Accepted Answer

The answer of ​In the water heater installation example in...

Question 6

In the computer room circuits in the chapter example, three separate neutral conductors are installed to reduce the possibility of a conductor overheating from ____ currents.

Accepted Answer

Nonlinear currents can cause overheating in neutral conductors, especially in environments with equipment that generates high levels of harmonic currents, such as computer rooms. Nonlinear loads distort the current waveform, leading to increased heat in the conductors.

Question 7

In the insurance office example in this chapter, the reception area has a(n)____ to provide a different "look" for the clients.

Accepted Answer

The correct answer is C) combination lighting system. This is because combination lighting systems are often used in office settings, including reception areas, to provide a versatile and adjustable lighting environment that can enhance the aesthetic appeal and comfort for clients.

Question 8

What steps should you take while tabulating materials to ensure the best possible outcome?

Accepted Answer

The answer of What steps should you take while tabulating...

Question 9

​What steps have been taken to make the computer room example in this chapter compliant with good practice?

Accepted Answer

The answer of ​What steps have been taken to make...

Question 10

A washer-dryer is rated for 4000 VA at 208Y/120 volts single-phase. The overcurrent protective device must be rated at least ____ amperes.

Accepted Answer

The answer of A washer-dryer is rated for 4000 VA...

Question 11

The ____ feature of a receptacle provides protection from lightning and other severe electrical surges that may occur in the electrical system.

Accepted Answer

Surge protection is specifically designed to protect electrical devices from voltage spikes, including those caused by lightning and other severe electrical surges.

Question 12

In the insurance office example in this chapter, a separate, insulated-grounding conductor is installed with the feeder circuit and is connected to the neutral conductor at the service. This grounding system reduces, if not eliminates, the ____ that often is (are)present in the conventional grounding system.

Accepted Answer

Electromagnetic interference (EMI) can be reduced or eliminated by using a separate, insulated-grounding conductor connected to the neutral conductor at the service, as it provides a cleaner path for electrical currents and reduces noise in the grounding system.

Question 13

____ are available in separate units, which can be used to provide protection on any type of sensitive equipment, such as computers and printers .

Accepted Answer

Surge protectors are designed to protect electrical devices from voltage spikes, making them suitable for sensitive equipment like computers and printers.

Question 14

Water heaters are available for commercial occupancies in many sizes and voltages, and for both single and ____ supply.

Accepted Answer

Water heaters for commercial occupancies are available for both single and 3-phase electrical supply, accommodating various electrical systems in commercial buildings.

Question 15

NEC 422.13 requires that the branch circuit overcurrent device and conductors for a storage-type electric water heater with a capacity of 120 gallons (450 L)or less must be sized at not less than ____ percent of the rating of the water heater .

Accepted Answer

According to the National Electrical Code (NEC), the branch circuit overcurrent protection and conductors for a storage-type electric water heater with a capacity of 120 gallons or less must be sized at not less than 125% of the rating of the water heater. This ensures that the wiring can handle the electrical load without overheating.

Question 16

In the water heater circuit example in this chapter, the minimum size conductor, if all terminals are rated 75 degrees Celsius or higher, is ____ AWG as the ampacity in NEC Table 310.16 is 85 amperes.

Accepted Answer

The correct choice is 4 AWG because according to NEC Table 310.16, a 4 AWG copper conductor with a 75 degrees Celsius insulation rating has an ampacity of 85 amperes, which matches the requirement.

Question 17

Three-phase circuits result in a smaller ____ than if a 1-phase circuit were installed.

Accepted Answer

The answer of Three-phase circuits result in a smaller ____...

Question 18

According to NEC 422.31(B), having a disconnect switch in sight is required if a(n)____ is not readily accessible.

Accepted Answer

According to NEC 422.31(B), a disconnect switch must be in sight from the appliance or be lockable if the circuit breaker serving as the disconnecting means is not readily accessible.

Question 19

In the insurance office example in this chapter, a special raceway is installed in the ____. This raceway provides for both electrical power and communications.

Accepted Answer

The answer of In the insurance office example in this...

Question 20

Why is surge protection important?

Accepted Answer

The answer of Why is surge protection important?...

Quiz 10: Working Drawings--Upper Level

When tabulating materials, take special note of long runs of raceway or cable and determine whether ____ is a problem. This can mean an increase in conductor and/or raceway size.

A washer-dryer rated for 4000 VA at 208Y/120 volts single-phase must have a branch-circuit ampacity of at least ____ amperes.

In the computer room example in this chapter, the grounding terminal of each of the special receptacles is connected to a(n) ____.

Describe basic water heater specifications and those of the beauty salon example in this chapter, and explain the role the electrical contractor in this area.

In the water heater installation example in this chapter, what is the meaning of temperature limiting?

In the computer room circuits in the chapter example, three separate neutral conductors are installed to reduce the possibility of a conductor overheating from ____ currents.

In the insurance office example in this chapter, the reception area has a(n) ____ to provide a different "look" for the clients.

What steps should you take while tabulating materials to ensure the best possible outcome?

What steps have been taken to make the computer room example in this chapter compliant with good practice?

A washer-dryer is rated for 4000 VA at 208Y/120 volts single-phase. The overcurrent protective device must be rated at least ____ amperes.

The ____ feature of a receptacle provides protection from lightning and other severe electrical surges that may occur in the electrical system.

____ are available in separate units, which can be used to provide protection on any type of sensitive equipment, such as computers and printers .

Water heaters are available for commercial occupancies in many sizes and voltages, and for both single and ____ supply.

NEC 422.13 requires that the branch circuit overcurrent device and conductors for a storage-type electric water heater with a capacity of 120 gallons (450 L) or less must be sized at not less than ____ percent of the rating of the water heater .

In the water heater circuit example in this chapter, the minimum size conductor, if all terminals are rated 75 degrees Celsius or higher, is ____ AWG as the ampacity in NEC Table 310.16 is 85 amperes.

Three-phase circuits result in a smaller ____ than if a 1-phase circuit were installed.

According to NEC 422.31(B) , having a disconnect switch in sight is required if a(n) ____ is not readily accessible.

In the insurance office example in this chapter, a special raceway is installed in the ____. This raceway provides for both electrical power and communications.

Why is surge protection important?

Quiz 10: Working Drawings--Upper Level

When tabulating materials, take special note of long runs of raceway or cable and determine whether ____ is a problem. This can mean an increase in conductor and/or raceway size.

A washer-dryer rated for 4000 VA at 208Y/120 volts single-phase must have a branch-circuit ampacity of at least ____ amperes.

In the computer room example in this chapter, the grounding terminal of each of the special receptacles is connected to a(n) ____.

​Describe basic water heater specifications and those of the beauty salon example in this chapter, and explain the role the electrical contractor in this area.

​In the water heater installation example in this chapter, what is the meaning of temperature limiting?

In the computer room circuits in the chapter example, three separate neutral conductors are installed to reduce the possibility of a conductor overheating from ____ currents.

In the insurance office example in this chapter, the reception area has a(n) ____ to provide a different "look" for the clients.

What steps should you take while tabulating materials to ensure the best possible outcome?

​What steps have been taken to make the computer room example in this chapter compliant with good practice?

A washer-dryer is rated for 4000 VA at 208Y/120 volts single-phase. The overcurrent protective device must be rated at least ____ amperes.

The ____ feature of a receptacle provides protection from lightning and other severe electrical surges that may occur in the electrical system.

____ are available in separate units, which can be used to provide protection on any type of sensitive equipment, such as computers and printers .

Water heaters are available for commercial occupancies in many sizes and voltages, and for both single and ____ supply.

NEC 422.13 requires that the branch circuit overcurrent device and conductors for a storage-type electric water heater with a capacity of 120 gallons (450 L) or less must be sized at not less than ____ percent of the rating of the water heater .

In the water heater circuit example in this chapter, the minimum size conductor, if all terminals are rated 75 degrees Celsius or higher, is ____ AWG as the ampacity in NEC Table 310.16 is 85 amperes.

Three-phase circuits result in a smaller ____ than if a 1-phase circuit were installed.

According to NEC 422.31(B) , having a disconnect switch in sight is required if a(n) ____ is not readily accessible.

In the insurance office example in this chapter, a special raceway is installed in the ____. This raceway provides for both electrical power and communications.

Why is surge protection important?

Describe basic water heater specifications and those of the beauty salon example in this chapter, and explain the role the electrical contractor in this area.

In the water heater installation example in this chapter, what is the meaning of temperature limiting?

What steps have been taken to make the computer room example in this chapter compliant with good practice?