Exam 3: Boxes and Enclosures

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.

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

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

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

Multiconductor cord or cable used to support a box must be protected in an approved manner so that the conductors are not subjected to ____.

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.

The length of a straight pull for multiple raceways must be at least ____ times the trade size (metric designator) of the largest single raceway.

The minimum box width for U pulls must include ____.

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

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?

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

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

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

____ 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.

Supporting screws for nonmetallic boxes must be mounted ____.

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

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

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.

Box calculations for 4 AWG and larger conductors (under 600 volts) are performed based on the ____.

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