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Exam 3: Boxes and Enclosures

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Question 1

Multiple Choice

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

A) Branches or taps
B) Cables, cable sheaths or metallic sheathing
C) Raceway openings
D) Splices, taps, or devices

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Question 2

Multiple Choice

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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.

A) 20
B) 30
C) 40
D) 50

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Question 3

Multiple Choice

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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.

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

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?

____ 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.

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

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.

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

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

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

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

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

Supporting screws for nonmetallic boxes must be mounted ____.

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

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

The minimum box width for U pulls must include ____.

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

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

Conduit body support must be ____.