NEC 314
The total volume occupied by two internal cable clamps, six 12 AWG conductors, and a single-pole switch is _____ cu in.
20.25
In completed installations, each outlet box shall have a _____.
Cover, Faceplate, or Canopy
A wood brace used for supporting a box for structural mounting shall have a cross-section not less than nominal _____.
1 in. x 2 in.
Where nonmetallic-sheathed cable or multiconductor Type UF cable is used, the sheath shall extend not less than _____ in. inside the box and beyond any cable clamp.
1/4
Handhole enclosures shall be designed and installed to withstand _____.
All loads likely to be imposed on them
Metal boxes shall be _____ in accordance with Article 250.
Grounded >WRONG<
In installations within or behind noncombustible walls or ceilings, the front edge of a box, plaster ring, extension ring, or listed extender employing a flush-type cover, shall be set back not more than _____ in. from the finished surface.
1/4 in.
According to the NEC, the volume of a 3 in. x 2 in. x 2 in. device box is _____ cu in.
10 cu in.
Handhole enclosure covers shall require the use of tools to open, or they shall weigh over _____ lb.
100
Two intermediate metal or rigid metal conduits threaded wrenchtight into an enclosure can be used to support an outlet box containing devices or luminaires, if each raceway is supported within _____ in. of the box.
18
A luminaire that weighs more than _____ lb can be supported by an outlet box that is listed for the weight of the luminaire to be supported.
50
Boxes used at luminaire or lampholder outlets in a ceiling shall be designed so that a luminaire or lampholder can be attached and the boxes shall be required to support a luminaire weighing a minimum of _____ lb.
50 lb
A vertically mounted luminaire weighing not more than _____ lb can be supported to a device box or plaster ring with no fewer than two No. 6 or larger screws.
6
Pull boxes or junction boxes with any dimension over _____ ft shall have all conductors cabled or racked in an approved manner.
6
Listed outlet boxes to support ceiling-suspended fans that weigh more than _____ lb shall have the maximum allowable weight marked on the box.
70 >WRONG<
When Type NM cable is used with nonmetallic boxes not larger than 2 1/4 x 4 in., securing the cable to the box shall not be required if the cable is fastened within _____ in. of that box.
8
Mounting holes for screws used to secure boxes to a structural member using brackets on the outside of the enclosure shall be _____.
Approved
True or False: Exposed live parts on the power distribution block are allowed when the junction box cover is removed.
False
True of False: Where one or more equipment grounding conductors enter a box, a _____ volume allowance in accordance with Table 314.16(B) shall be made based on the largest equipment grounding conductor.
True
True or False: Boxes, conduit bodies, and fittings installed in wet locations shall be listed for use in wet locations.
True
True or False: Conduit bodies that are durably and legibly marked by the manufacturer with their volume can contain splices, taps, or devices.
True
A device or utilization equipment wider than a single 2 in. device box shall have _____ volume allowances provided for each gang required for mounting.
double
A surface extension can be made from the cover of a box where the cover is designed so it is unlikely to fall off or be removed if its securing means becomes loose. The wiring method shall be _____ for an approved length that permits removal of the cover and provides access to the box interior, and arranged so that any grounding continuity is independent of the connection between the box and cover.
flexible
Where a luminaire stud or hickey is present in the box, a _____ volume allowance in accordance with Table 314.16(B) shall be made for each type of fitting, based on the largest conductor present in the box.
single
Where one or more equipment grounding conductors enter a box, a _____ volume allowance in accordance with Table 314.16(B) shall be made based on the largest equipment grounding conductor.
single
Where a box is provided with _____ or more securely installed barriers, the volume shall be apportioned to each of the resulting spaces; each barrier, if not marked with its volume, shall be considered to take up 1/2 cu in. if metal, and 1 cu in. if nonmetallic.
two >WRONG<
Noncombustible surfaces that are broken or incomplete around boxes employing a flush-type cover or faceplate shall be repaired so there will be no gaps or open spaces larger than _____ in. at the edge of the box.
1/8
_____ drainage openings not smaller than 1/8 in. and not larger than 1/4 in. in diameter shall be permitted to be installed in the field in boxes or conduit bodies listed for use in damp or wet locations.
Approved
_____ shall be installed so that the wiring contained in them can be rendered accessible without removing any part of the building or structure or, in underground circuits, without excavating sidewalks, paving, or earth.
Conduit bodies, Boxes, and handhole covers
Short-radius conduit bodies such as capped elbows and service-entrance elbows that enclose conductors 6 AWG or smaller shall not contain _____.
Devices, splices, or taps
Each strap containing one or more devices shall count as a _____ volume allowance in accordance with Table 314.16(B), based on the largest conductor connected to a device(s) or equipment supported by the strap.
Double
In straight pulls, the length of the box or conduit body shall not be less than _____ times the trade size of the largest raceway.
Eight
In installations within walls or ceilings constructed of wood or other combustible surface material, boxes, plaster rings, extension rings, or listed extenders shall _____.
Extend to the finished surface, or project from the finished surface
Equipment grounding conductor(s), and not more than _____ fixture wires smaller than 14 AWG shall be permitted to be omitted from the calculations where they enter the box from a domed luminaire or similar canopy and terminate within that box.
Four
For the purposes of determining box fill, each device or utilization equipment in the box which is wider than a single device box counts as two conductors for each _____ required for the mounting.
Gang
Listed boxes and handhole enclosures designed for underground installation can be directly buried when covered by _____, if their location is effectively identified and accessible.
Gravel or Noncohesive granulated soil
Floor boxes _____ specifically for the application shall be used for receptacles located in the floor.
Listed
Outlet boxes required in 314.27 shall be permitted to support _____ locking support and mounting receptacles used in combination with compatible attachment fittings.
Listed
Handhole enclosure covers shall have an identifying _____ that prominently identifies the function of the enclosure, such as "electric."
Mark or Logo
Power distribution blocks installed on the line side of the service equipment shall be _____ "suitable for use on the line side of service equipment" or equivalent.
Marked and Listed
Underground raceways and cable assemblies entering a handhole enclosure shall extend into the enclosure, but they are not required to be _____.
Mechanically connected to the handhole enclosure
_____ can be used to secure boxes to a structural member using brackets on the outside of the enclosure.
Nails and Screws
Utilization equipment weighing not more than 6 lb can be supported to any box or plaster ring secured to a box, provided the equipment is secured with at least two _____ or larger screws.
No. 6
Nonmetallic boxes can be used with _____.
Nonmetallic raceways, nonmetallic sheaths, and flexible cords
When mounting an enclosure in a finished surface, the enclosure shall be _____ secured to the surface by clamps, anchors, or fittings identified for the application.
Rigidly
Surface-mounted outlet boxes shall be _____.
Rigidly and securely fastened in place
Outlet boxes can be secured to suspended-ceiling framing members by mechanical means such as _____, or by other means identified for use with the suspended-ceiling framing member(s).
Screws, bolts and rivets
Power distribution blocks shall be permitted in pull and junction boxes over 100 cu in. when _____.
They are listed as a power distribution block, they are installed in a box not smaller than required by the installation instructions of the power distribution, and the junction box is sized so that the wire-bending space requirements of 312.6 can be met
True or False: Power distribution blocks shall be permitted in pull and junction boxes over 100 cu in. when they comply with the provisions of 314.28(E)(1) through (5).
True
True or False: Surface extensions shall be made by mounting and mechanically securing an extension ring over the box, unless otherwise permitted.
True
True or False: When calculating box fill, each space within a box installed with a barrier shall be calculated separately.
True
Enclosures not over 100 cu in. having threaded entries and not containing a device shall be considered to be adequately supported where _____ or more conduits are threaded wrenchtight into the enclosure and each conduit is secured within 3 ft of the enclosure.
Two
When counting the number of conductors in a box, a conductor running through the box with an unbroken loop or coil not less than twice the minimum length required for free conductors shall be counted as _____ conductor(s).
Two
Where the junction box contains a power distribution block, and it has conductors that do not terminate on the power distribution block(s), the through conductors shall be arranged so the power distribution block terminals are _____ following installation.
Unobstructed
Conductors, splices, or terminations in a handhole enclosure shall be listed as suitable for _____.
Wet locations
Where angle or U pulls are made, the distance between each raceway entry inside the box or conduit body and the opposite wall of the box or conduit body shall not be less than _____ times the trade size of the largest raceway in a row plus the sum of the trade sizes of the remaining raceways in the same wall and row.
six
