Understanding NEC Articles 310 Flashcards
The maximum current in amperes that a conductor can carry continuously under the conditions of use without exceeding its temperature rating is known as its _____.
Answer 1: short-circuit rating
Answer 2: ground-fault rating
Answer 3: ampacity
Answer 4: all of these
Answer 3: ampacity
100 Ampacity
Solid aluminum conductors of 8 AWG 10 AWG and 12 AWG shall be made of an AA-_____ series electrical grade aluminum alloy conductor material.
Answer 1: 1350
Answer 2: 2000
Answer 3: 6000
Answer 4: 8000
Answer 4: 8000
310.3(B)(1)
Stranded aluminum conductors 8 AWG through 1000 kcmil marked as _____ shall be made of an AA-8000 series electrical grade aluminum alloy conductor material.
Answer 1: Type UF
Answer 2: Type NM
Answer 3: Type NMC
Answer 4: Type SE
Answer 4: Type SE
310.3(B)(2)
The _____ core of a copper-clad aluminum conductor shall be made of an AA-8000 series electrical grade aluminum alloy conductor material.
Answer 1: aluminum
Answer 2: copper
Answer 3: steel
Answer 4: iron
Answer 1: aluminum
310.3(B)(3)
Conductors in Article 300 shall be of copper aluminum or copper-clad aluminum unless otherwise specified. Copper-clad aluminum conductor material shall be _____.
Answer 1: identified for the use
Answer 2: listed
Answer 3: indicated as suitable
Answer 4: approved
Answer 2: listed
310.3(B)(4)
Where installed in raceways conductors _____ and larger shall be stranded unless specifically permitted or required elsewhere in the NEC.
Answer 1: 10 AWG
Answer 2: 8 AWG
Answer 3: 6 AWG
Answer 4: 4 AWG
Answer 2: 8 AWG
310.3(C)
Conductors for general wiring not specifically permitted elsewhere in this Code to be covered or bare shall _____.
Answer 1: not be permitted
Answer 2: be insulated
Answer 3: be rated
Answer 4: be listed
Answer 2: be insulated
310.3(D)
Insulated conductors with letter designation of _____ are permitted in a wet location with a maximum operating temperature of 90°C.
Answer 1: USE
Answer 2: RHW
Answer 3: XHWN
Answer 4: THWN-2
Answer 4: THWN-2
310.4(1) Table
The insulation of USE-2 cable is _____ resistant.
Answer 1: heat
Answer 2: moisture
Answer 3: sunlight
Answer 4: heat and moisture
Answer 4: heat and moisture
310.4(1) Table
Insulated conductors and cables used in _____ shall be any of the types identified in this Code.
Answer 1: dry and damp locations
Answer 2: dry locations
Answer 3: damp locations
Answer 4: wet and damp locations
Answer 2: dry locations
310.10(A)
Insulated conductors and cables used in _____ shall be Types FEP FEPB MTW PFA RHH RHW RHW-2 SA THHN THW THW-2 THHW THWN THWN-2 TW XHH XHHW XHHW-2 XHHN XHWN XHWN-2 Z or ZW.
Answer 1: dry and damp locations
Answer 2: dry locations
Answer 3: damp locations
Answer 4: wet and damp locations
Answer 1: dry and damp locations
310.10(B)
In general the minimum size conductor permitted for parallel installations is _____.
Answer 1: 10 AWG
Answer 2: 4 AWG
Answer 3: 1 AWG
Answer 4: 1/0 AWG
Answer 4: 1/0 AWG
310.10(G)(1)
Where conductors in parallel are run in _____ raceway(s) the raceway(s) shall have the same electrical characteristics.
Answer 1: separate
Answer 2: similar
Answer 3: the same
Answer 4: different
Answer 1: separate
310.10(G)(3)
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 Table 310.12(A) shall be permitted to be applied.
Answer 1: 100A
Answer 2: 200A
Answer 3: 400A
Answer 4: all of these
Answer 4: all of these
| 310.12(B)
Where there are no adjustment or correction factors required the feeder conductors rated between 100A and _____ supplying the entire load associated with an individual dwelling unit Table 310.12(A) shall be permitted to be applied..
Answer 1: 150A
Answer 2: 200A
Answer 3: 300A
Answer 4: 400A
Answer 4: 400A
310.12(A)
No conductor shall be used where its _____ temperature exceeds that designated for the type of insulated conductor involved.
Answer 1: operating
Answer 2: ambient
Answer 3: highest
Answer 4: lowest
Answer 1: operating
310.14(A)(3)
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.
Answer 1: friction
Answer 2: magnetism
Answer 3: heat
Answer 4: compatibility
Answer 3: heat
310.14(A)(3) Informational Note 1(2)
For raceways exposed to direct sunlight on or above rooftops where the distance above the roof to the bottom of the raceway or cable is less than _____ a temperature adder of 60°F shall be added to the outdoor temperature to determine the ambient temperature correction factor.
Answer 1: ¼ in.
Answer 2: 1⁄3 in.
Answer 3: ½ in.
Answer 4: 3/4 in.
Answer 4: 3/4 in.
310.15(B)(2)
Where six current-carrying conductors are run in the same conduit the ampacity of each conductor shall be adjusted to _____ of its ampacity.
Answer 1: 40 percent
Answer 2: 60 percent
Answer 3: 80 percent
Answer 4: 90 percent
Answer 3: 80 percent
310.15(C)(1) Table
For the purposes of ampacity adjustment when determining the number of current-carrying conductors a grounding or bonding conductor _____ be counted when applying the provisions of 310.15(C)(1).
Answer 1: shall not
Answer 2: shall
Answer 3: is permitted to
Answer 4: can
Answer 1: shall not
310.15(F)
