Quarter 4 Final
Where rock bottom is encountered, a rod or pipe electrode shall be driven at an angle not to exceed __________ degrees from the vertical.
45
Grounding electrodes of the rod type less than _________ in diameter shall be listed.
5/8
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
_______ shall not be used as grounding electrodes.
Metal underground gas piping systems and aluminum
Boxes, conduit bodies, and fittings installed in wet locations shall be listed for use in wet locations. True or False
True
Local metal underground systems or structures such as underground tanks are permitted to serve as grounding electrode. True or False
True
Metal braces used for the support of boxes shall be protected against corrosion. True or False
True
The armor of Type AC cable is recognized by the NEC as an equipment grounding conductor. True or False
True
Two or more grounding electrodes bonded together are considered a single grounding electrode system. True or False
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
1. Nonmetallic boxes are permitted for use with _____________. (a) nonmetallic sheaths (b) nonmetallic raceways (c) flexible cords (d) all of these
all of these
An electrode encased by at least 2 in. of concrete, located horizontally near the bottom or vertically and within that portion of a concrete foundation or footing that is in direct contact with the earth, shall be permitted as a grounding electrode when it consists of _______________.
bare copper conductor not smaller than 4 AWG
Metal handhole enclosure covers and other exposed conductive surfaces shall be _____.
bonded to the equipment grounding conductor
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
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
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
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
_________________ on equipment to be grounded or bonded shall be removed from contact surfaces to ensure good electrical continuity.
paint, lacquer, or enamel (any of these)
if a single rod, pipe, or ___________ grounding electrode has a resistance to earth of 25 ohms or less, the supplement electrode shall not be required.
plate
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)
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)
Listed FMC can be used as the equipment grounding conductor if the conduit does not exceed trade size ______________.
1 1/4
Power distribution blocks shall be permitted in pull and junction boxes over _____ cu in.
100
When a ground ring is used as a grounding electrode , it shall be installed at a depth below the earth's surface of not less than ______.
30 in
Rod and pipe grounding electrodes shall not be less than ________ ft in length.
8
Where practicable, rod, pipe, and plate electrode shall be installed ______.
below permanent moisture level
Handhole enclosure covers shall have an identifying mark or logo that prominently identifies the function of the enclosure, such as \"_____.\"
electric
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.
Grounding electrodes of bare or electrically conductive coated iron or steel plates shall be least ______ in. thick.
1/4
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
Where the supplemental electrode is a rod, that portions of the bonding jumper that is the sole connection to the supplemental grounding electrode shall not be required to be larger than _______ AWG copper.
6
Listed liquidtight flexible metal conduit (LFMC) is acceptable as an equipment grounding conductor when it terminates in listed fittings and is protected by an overcurrent device rated 60A or less for trade sizes 3/8 through 1/2. True or False
False
Surface extensions shall be made by mounting and mechanically securing an extension ring over the box unless otherwise permitted. True or False
True
Handhole enclosures shall be designed and installed to withstand _____.
all loads likely to be imposed on them
Swimming pool structures and structural _______ [680.26(B)(1) and (B)(2)] shall not be used as a grounding electrode.
reinforcing steel
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
According to the NEC, the volume of a 3 in. x 2 in. x 2 in. device box is _____ cu in.
10
Metal boxes shall be _____ in accordance with Article 250.
Grounded and Bonded
Concrete-encased electrodes of ________________ shall not be required to be part of the grounding electrode system where the steel reinforcing bars or rods aren't accessible for use without disturbing the concrete.
existing buildings or structures
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
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
Listed FMC and LFMC is permitted as an equipment grounding conductor at lengths _______ ft.
up to 6
Conductors, splices, or terminations in a handhole enclosure shall be listed as suitable for _____.
wet locations
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
exposed, normally non-current-carrying metal parts of cord-and-plug-connected equipment shall be connected to the equipment grounding conductor where operated at over __________ to ground.
150V
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
A buried iron or steel plate used as a grounding electrode shall expose not less then ________ sq ft of surface area to exterior soil.
2
A bare 4 AWG copper conductor installed horizontally near the bottom or vertically, and within that portion of a concrete foundation or footing that is in direct contact with the earth, can be used as a grounding electrode when the conductor is at least _____ ft in length.
20
Where rock bottom is encountered when driving a ground rod at an angle up to 45 degrees, the electrode can be burred in a trench that is at least ______ deep
30 in
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
_____ 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
Where bonding jumpers are used to connect grounding electrodes together to form a grounding electrode system, rebar is permitted to be used as a conductor to interconnect the electrodes. True or False
False
Wood braces shall have a cross-section not more than 1 in True or False
False
Conduit bodies that are durably and legibly marked by the manufacturer with their volume can contain splices, taps, or devices. True or False
True
Reinforcing bars for use as a concrete-encased electrode can be bonded together by the usual steel tie wires or other effective means. 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
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
An equipment grounding conductor shall be identified by __________.
a continuous outer finish that is green, being bare, or a continuous outer finish that is green with one or more yellow stripes (any of these)
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
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)
Where internal _____ means are provided between all entries, nonmetallic boxes shall be permitted to be used with metal raceways or metal - armored cables.
bonding
_____ 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
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
The upper end of a ground rod electrode shall be __________________ unless the above-ground end and the grounding electrode conductor attachment are protected against physical damage.
flush with or below ground level
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
Conductors with insulation or individual covering that is ______, or otherwise identified by this section shall not be used for ungrounded or grounded circuit conductors.
green or green with one or more yellow stripes
Concrete-encased grounding electrodes that are installed where the concrete is installed with _____________ is not considered to be in direct contact with the earth.
insulation, vapor barriers, or films (any of these)
Floor boxes _____ specifically for the application shall be used for receptacles located in the floor.
listed
Equipment grounding conductors, grounding electrode conductors, and bonding jumpers shall be connected by ____________________.
listed pressure connectors, terminal bars, and exothermic welding (any of these)
Ground clamps or other fittings exposed to physical damage shall be enclosed in _________________, or equivalent protective covering.
metal or wood
The Code requires the installation of an equipment grounding conductor of the wire type in ________. a. rigid metal conduit b. intermediate metal conduit c. electrical metallic tubing d. none of these
none of these
An outlet box or enclosure mounted on a building or other surface shall be _____.
rigidly and securely fastened in place
A ground ring encircling the building or structure can be used as a grounding electrode when the ___________.
ring is in direct contact with the earth, ring consists of at least 20 ft of bare copper conductor, and bare copper conductor is not smaller than 2 AWG (all of these)
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 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
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
Where the resistance-to-ground of 25 ohms or less is not achieved for a single rod electrode, _________.
the single rod electrode shall be supplemented by one additional electrode
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
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
One or more metal in-ground support structure(s) in direct contact with the earth vertically for _____ ft or more, with or without concrete en-casement is permitted to be a grounding electrode in accordance with 250.52.
10
In order for a metal underground water pipe to be used as a grounding electrode, it shall be in direct contact with the earth for ____________.
10 ft or more
Handhole enclosure covers shall require the use of tools to open, or they shall weigh over _____ lb.
100
Type MC cable provides an effective ground-fault current path and is recognized by the NEC as an equipment grounding conductor __________.
when it contains an insulated or uninsulated equipment grounding conductor in compliance with 250.118(1)
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
Listed outlet boxes to support ceiling-suspended fans that weigh more than _____ lb shall have the maximum allowable weight marked on the box.
35
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
The total volume occupied by two internal cable clamps, six 12 AWG conductors, and a single-pole switch is _____ cu in.
20.25
Listed FMC can be used as the equipment grounding conductor if the length in any ground return path does not exceed 6 ft and the circuit conductors contained in the conduit are protected by overcurrent devices rated at _____ or less.
20V
An insulated or covered conductor _________ AWG and larger shall be permitted, at the time of installation, to be permanently identified as an equipment grounding conductor at each end and at every point where the conductor is accessible.
4
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
Where a metal undergrounded water pipe is used as a grounding electrode, the continuity of the grounding path or the bonding connection to he interior piping shall not rely on ________ and similar equipment.
water meters or filtering devices
A rod or pipe electrode shall be installed such that at least _________ of length is in contact with the soil.
8 ft
