20 APPSUP Article 314 - Outlet, Pull, and Junction Boxes; Conduit Bodies; and Handhole Enclosures (Quarter 4)
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.
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
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
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
According to the NEC, the volume of a 3 in. x 2 in. x 2 in. device box is _____ cu in.
10
Handhole enclosure covers shall require the use of tools to open, or they shall weigh over _____ lb.
100
Power distribution blocks shall be permitted in pull and junction boxes over _____ cu in.
100
Two intermediate metal or rigid metal conduits threaded wrench tight 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
The total volume occupied by two internal cable clamps, six 12 AWG conductors, and a single-pole switch is _____ cu in.
20.25
The installation and use of all boxes and conduit bodies used as outlet, device, junction, or pull boxes, depending on their use, and handhole enclosures, are covered in article ________________.
314
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 lamp holder outlets in a ceiling shall be designed so that a luminaire or lamp holder can be attached and the boxes shall be required to support a luminaire weighing a minimum of _____ lb.
50
Boxes used at luminaire outlets on a vertical surface shall be marked on the interior of the box to indicate the maximum weight of the luminaire that is permitted to be supported by the box if other than _____ lb.
50
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
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.
6
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
_____ 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
Wood braces shall have a cross-section not more than 1 in True or False
False
Metal boxes shall be _____ in accordance with Article 250.
Grounded and Bonded
Boxes, conduit bodies, and fittings installed in wet locations shall be listed for use in wet locations. True or False
True
Metal braces used for the support of boxes shall be protected against corrosion. True or False
True
Surface extensions shall be made by mounting and mechanically securing an extension ring over the box unless otherwise permitted. True or False
True
Where one or more internal cable clamps are present in the box, a single volume allowance in accordance with Table 314.16(B) shall be made based on the largest conductor present in the box.
True
A device or utilization equipment wider than a single 2 in. device box shall have _____ allowance provided for each gang required for mounting.
a double volume
Each strap containing one or more devices shall count as _____ allowance in accordance with Table 314.16(B), based on the largest conductor connected to a device(s) or equipment supported by the strap.
a double volume
Where a luminaire stud or hickey is present in the box, _____ 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.
a single volume
Where one or more equipment grounding conductors enter a box, _____ allowance in accordance with Table 314.16(B) shall be made based on the largest equipment grounding conductor.
a single volume
Handhole enclosures shall be designed and installed to withstand _____.
all loads likely to be imposed on them
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).
bolts, screws, or rivets (any of these)
Metal handhole enclosure covers and other exposed conductive surfaces shall be _____.
bonded to the equipment grounding conductor
_____ 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.
boxes, conduit bodies, and handhole enclosures (all of these)
In completed installations, each outlet box shall have a _____.
cover, faceplate, or canopy (any of these)
Outlet boxes mounted in the ceilings of habitable rooms of _____, in a location acceptable for the future installation of a ceiling-suspended (paddle) fan, shall be listed for the sole support of ceiling-suspended paddle fans.
dwelling occupancies
Support wire(s) used for enclosure support in suspended ceilings shall be fastened at _____ so as to be taut within the ceiling cavity.
each end
Handhole enclosure covers shall have an identifying mark or logo that prominently identifies the function of the enclosure, such as \"_____.\"
electric
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
Floor boxes _____ specifically for the application shall be used for receptacles located in the floor.
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
All _____ shall be provided with covers compatible with the box or conduit body construction and suitable for the conditions of use.
pull boxes, junction boxes, or conduit bodies (all of these)
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
An outlet box or enclosure mounted on a building or other surface shall be _____.
rigidly and securely fastened in place
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
Where splices, or, angle or U pulls are made, the distance between each raceway entry inside the box and the opposite wall of the box may not be less than _____ the trade size of the largest raceway in a row.
six times
Where _____ or, angle or "U" pulls are made, the calculated distance between raceways shall be increased for additional entries by the amount of the sum of the diameters of all other raceway entries in the same row on the same wall of the box. Each row shall be calculated individually, and the single row that provides the maximum distance shall be used.
splices
Short-radius conduit bodies such as capped elbows and service-entrance elbows that enclose conductors 6 AWG or smaller shall not contain _____.
splices, taps, or devices (any of these)
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 wrench tight 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
Conductors, splices, or terminations in a handhole enclosure shall be listed as suitable for _____.
wet locations
Listed outlet boxes to support ceiling-suspended fans that weigh more than _____ lb shall have the maximum allowable weight marked on the box.
35
Conduit bodies that are durably and legibly marked by the manufacturer with their volume can contain splices, taps, or devices. True or False
True
Screws used for the purpose of attaching covers or other equipment to the box shall be either machine screws matching the thread gauge and size that is integral to the box or be in accordance with the manufacturer True or False
True
1. Nonmetallic boxes are permitted for use with _____________. (a) nonmetallic sheaths (b) nonmetallic raceways (c) flexible cords (d) all of these
all of these
Where internal _____ means are provided between all entries, nonmetallic boxes shall be permitted to be used with metal raceways or metal - armored cables.
bonding
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 therefrom
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
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
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.
one
Where splices, or, angle or U pulls are made and the conductor enters and leaves from the same wall and row of the box, the distance to the opposite wall may not be less than _____ the trade size of the largest raceway in the row plus the sum of the remaining trade sizes in the same row.
six times
