National Electrical Code. (NEC) Article 310. Conductors for General Wiring.
In general, the minimum size conductor permitted for use in parallel installations is _____.
1/0 AWG and larger.
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. 400A.
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 in.
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 installed in raceways, conductors _____ AWG and larger shall be stranded, unless specifically permitted or required elsewhere in the NEC.
8 AWG and larger.
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.
No conductor shall be used where its operating temperature exceeds that designated for the type of insulated conductor involved.
True.
Where conductors in parallel are run in separate raceways, the raceways shall have the same electrical characteristics.
True.
Conductors for general wiring not specifically permitted elsewhere in this Code to be covered or bare shall _____.
be insulated.
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.
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.
