Article 310-Conductors for General Wiring

Parallel conductors shall have the same _____.

length, material, and size in circular mil area

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 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

Where installed in raceways, conductors _____ AWG and larger shall be stranded, unless specifically permitted or required elsewhere in the NEC.

8

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

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

In general, where installed in raceways, conductors _____ AWG and larger shall be stranded.

8

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

In general, the minimum size conductor permitted for use in parallel installations is _____.

1/0 AWG

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, 200A, and 400A

The minimum size copper conductor permitted for voltage ratings up to 2,000V shall be _____ AWG.

14

Conductor adjustment factors shall not apply to conductors in raceways having a length not exceeding _____ in.

24

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 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°

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.

Each cable has not more than three current-carrying conductors, The conductors are 12 AWG copper, and No more than 20 current-carrying conductors are installed without maintaining spacing.

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 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

The ampacities specified in Table 310.16 are based on _____.

conductors rated 60°C, 75°C, or 90°C, an ambient temperature of 86°F, and no more than three current-carrying conductors

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

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.

one-family, the individual dwelling units of two-family, and the individual dwelling units of multifamily

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

In a 3-wire circuit consisting of two phase conductors and 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-

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