310-312 test
In general, the minimum size conductor permitted for use in parallel installations is _____.
1/0 awg
Sectioned equipment grounding conductors smaller than _____ AWG shall be permitted in multiconductor cables, if the combined circular mil area of the sectioned equipment grounding conductors in each cable complies with 250.122.
1/0 awg
Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than _____ at the edge of a cabinet or cutout box employing a flush-type cover.
1/8 in
Nonmetallic-sheathed cables can enter the top of surface-mounted cabinets, cutout boxes, and meter socket enclosures through nonflexible raceways not less than 18 in. and not more than _____ in length if all of the required conditions are met.
10 ft
Where there are no adjustment or correction factors required, the service conductors for a rated service of _____ supplying the entire load associated with an individual dwelling unit, may be sized applying Table 310.12.
100A Answer 2: 200A Answer 3: 400A Answer 4: all of these
The minimum size copper conductor permitted for voltage ratings up to 2,000V shall be _____ AWG.
14 awg
Conductor adjustment factors shall not apply to conductors in raceways having a length not exceeding _____ in.
24
Article _____ covers the installation and construction specifications of cabinets, cutout boxes, and meter socket enclosures.
312
Enclosures for switches or overcurrent devices are allowed to have conductors feeding through where the wiring space at any cross section is not filled to more than _____ percent of the cross-sectional area of the space.
40
Where there are no adjustment or correction factors required, the feeder conductors for a rated service of between 100A and _____ supplying the entire load associated with an individual dwelling unit, may be sized applying Table 310.12
400A
If cables meeting the requirements in 310.15(C)(1)(d)(1) through (C)(1)(d)(3) with more than 20 current-carrying conductors are installed longer than 24 in. without maintaining spacing, are stacked, or are supported on bridle rings, a _____ percent adjustment factor shall be applied.
60
Where conductors are installed in raceways or cables exposed to direct sunlight on or above rooftops, a temperature adder of _____ shall be added to the outdoor temperature where the conduits are less than 7/8 in. from the rooftop.
60
Where raceways or cables are exposed to direct sunlight on or above rooftops and where the distance above the roof to the bottom of the raceway is less than _____ in., a temperature adder of 60°F shall be added to the outdoor temperature to determine the applicable ambient temperature for application of the correction factors in Table 310.15(B)(1) or Table 310.15(B)(2).
7/8
In general, where installed in raceways, conductors _____ AWG and larger shall be stranded.
8 awg
Where installed in raceways, conductors _____ AWG and larger shall be stranded, unless specifically permitted or required elsewhere in the NEC.
8 awg
Where six current-carrying conductors are run in the same conduit or cable, the ampacity of each conductor shall be lowered to _____ percent of its ampacity.
80
Insulated conductors rated 600V with the letters "HH" in their designation have a _____ insulation rating.
90°C
The ampacity adjustment factors of Table 310.15(C)(1)) do not apply to Type AC or Type MC cable without an overall outer jacket, if which of the following condition(s) is(are) met.
Answer 1: Each cable has not more than three current-carrying conductors. Answer 2: The conductors are 12 AWG copper. Answer 3: No more than 20 current-carrying conductors are installed without maintaining spacing. Answer 4: all of these
The ampacities specified in Table 310.16 are based on _____.
Answer 1: conductors rated 60°C, 75°C, or 90°C Answer 2: an ambient temperature of 86°F Answer 3: no more than three current-carrying conductors Answer 4: all of these
Parallel conductors shall have the same _____.
Answer 1: length Answer 2: material Answer 3: size in circular mil area Answer 4: all of these
Where correction or adjustment factors are required by 310.15(B) or (C), for single-phase feeder conductors installed for _____ dwellings, they shall be permitted to be applied to the ampacity associated with the temperature rating of the conductor.
Answer 1: one-family Answer 2: the individual dwelling units of two-family Answer 3: the individual dwelling units of multifamily Answer 4: all of these
Cabinets, cutout boxes, and meter socket enclosures can be used for conductors feeding through, spliced, or tapping off to other enclosures, switches, or overcurrent devices where _____.
Answer 1: the total area of the conductors at any cross section does not exceed 40 percent of the cross-sectional area of that space Answer 2: the total area of conductors, splices, and taps installed at any cross section does not exceed 75 percent of the cross-sectional area of that space Answer 3: a warning label on the enclosure identifies the closest disconnecting means for any feed-through conductors Answer 4: all of these
Type _____ insulated conductors shall not be subject to ampacity adjustment where installed exposed to direct sunlight on a rooftop.
XHHW-2
Conductors for general wiring not specifically permitted elsewhere in this Code to be covered or bare shall _____.
be insulated
In walls constructed of wood or other _____ material, electrical cabinets shall be flush with the finished surface or project therefrom.
combustible
In accordance with Article 310, temperature correction and adjustment factors are permitted to be applied to the ampacity for the temperature rating of the _____, if the corrected and adjusted ampacity does not exceed the ampacity for the temperature rating of the termination in accordance with the provisions of 110.14(C).
conductor
In a 3-wire circuit consisting of two phase conductors and the neutral conductor of a 4-wire, three-phase, wye-connected system, the common conductor is not a current-carrying conductor and not subject to the adjustment provisions of 310.15(C)(1).
false
Where raceways or cables enter above the level of uninsulated live parts of cabinets, cutout boxes, and meter socket enclosures in a wet location, a(an) _____ shall be used.
fitting listed for wet locations
Conductors that are intended for use as ungrounded conductors, whether used as a single conductor or in multiconductor cables, shall be finished to be clearly distinguishable from _____ conductors.
grounded and equipment grounding
There are four principal determinants of conductor operating temperature, one of which is _____ generated internally in the conductor as the result of load current flow, including fundamental and harmonic currents.
heat
A(An) _____ conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(C)(1).
neutral
On a 4-wire, three-phase wye circuit where the major portion of the neutral load consists of _____ loads, the neutral conductor shall be considered a current-carrying conductor.
nonlinear
In a 3-wire circuit consisting of two phase conductors and the neutral conductor of a 4-wire, three-phase, wye-connected system, the common conductor _____ a current-carrying conductor.
shall be counted as
Each cable entering a cutout box _____
shall be secured to the cutout box
The wiring space within enclosures for _____ and overcurrent devices shall be permitted for other wiring and equipment subject to limitations for specific equipment in accordance with Article 312.
switches
The _____ rating of a conductor is the maximum temperature, at any location along its length, which the conductor can withstand over a prolonged period of time without serious degradation.
temperature
Each current-carrying conductor of a paralleled set of conductors shall be counted as a current-carrying conductor for the purpose of applying the adjustment factors of 310.15(C)(1)).
true
The conductors described in 310.4 shall be permitted for use in any of the wiring methods covered in Chapter 3 and as specified in their respective tables or as permitted elsewhere in this Code.
true
When determining the number of current-carrying conductors, a grounding or bonding conductor shall not be counted when applying the provisions of 310.15(C)(1).
true
Where conductors in parallel are run in separate raceways, the raceways shall have the same electrical characteristics.
true
For one-family dwellings and the individual dwelling units of two-family and multifamily dwellings, single-phase feeder conductors consisting of _____ ungrounded conductor(s) and the neutral conductor from a 208Y/120V system shall be permitted to be sized in accordance with 310.12(A) through (D).
two
Cabinets, cutout boxes, and meter socket enclosures installed in wet locations shall be _____.
weatherproof
the neutral conductor of a 4-wire, three-phase, _____ connected system, the common conductor is a current-carrying conductor and subject to the adjustment provisions of 310.15(C)(1).
wye-
