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Exam 10: Working Drawings--Upper Level

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Question 1

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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.

A) 4
B) 8
C) 16
D) 32

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Question 2

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​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.

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Water heaters are available for commerci...

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Question 3

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

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

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

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.

Why is surge protection important?

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

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

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 .

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

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

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

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

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

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.

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

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

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.