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Exam 3: Boxes and Enclosures

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Question 1

Multiple Choice

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The minimum box width for U pulls must include ____.

A) 6 in. between raceways
B) the thickness of the two raceways
C) 12 in. between raceways plus the thickness of the two raceways
D) the average pull length plus the thickness of the two raceways

E) All of the above
F) A) and D)

Correct Answer

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C

Question 2

Multiple Choice

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Where multiple rows of raceways enter a box, calculate each row separately and use the ____.

A) single row that provides the maximum distance
B) average of the rows
C) median of the rows
D) single row that provides the minimal distance

E) B) and D)
F) B) and C)

Correct Answer

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Question 3

Multiple Choice

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What is the angle pull for a raceway in the horizontal dimension where the trade size of the largest raceway is 3 and the sum of the other raceways in the same row on the same wall is 4?

Cable connector(s) with a ____ outside the box are not counted when determining the number of conductors.

Supporting screws for nonmetallic boxes must be mounted ____.

Equipment grounding conductor(s) or equipment bonding jumpers entering a box count as ____.

____ are permitted inside conduit bodies, if the manufacturer durably and legibly marked the cubic inch capacity on the conduit body.

Wire connectors, pigtails, locknuts, bushings, raceway connectors, grounding screws, and equipment bonding jumpers are not factors when calculating ____.

A luminaire that weighs more than ____ pounds shall be supported independently of the outlet box, unless the outlet box is listed and marked on the interior of the box to indicate the maximum weight the box shall be permitted to support.

____ or fewer luminaire wires (smaller than 14 AWG) and an equipment grounding conductor can be omitted from box fill calculations where they enter a box from a domed luminaire (or similar canopy) and terminate within that box.

Conduit body support must be ____.

Nonmetallic-sheathed cable not fastened to the box must be secured within ____ in. of the box.

Inspection of the connections between luminaire conductors and circuit conductors must be possible without ____.

The maximum number of conductors applies only if the box does not contain any ____.

Where a box contains both straight and angle (or U) pulls, or straight pulls and splices, calculate each type of pull ____ to find the dimension.

Volume in boxes can be increased by using ____ rings, domed covers, extension rings, or similar items.

No requirement specifies the depth of a box, unless a ____.

The weight supported by any single conduit shall not exceed ____ pounds.

A 3 x 2-in. device box, 2.5 in. deep, has a volume of ____ cubic inches.

Snap switches (including dimmer switches) must be connected to a(n) ____ and must also provide a means to connect metal faceplates to the equipment grounding conductor, even if a metal faceplate is not installed.