Understanding NEC Articles 380, 386 & 392 Flashcards
A multioutlet assembly shall not be installed _____.
Answer 1: in hoistways
Answer 2: where subject to severe physical damage
Answer 3: where subject to corrosive vapors
Answer 4: all of these
Answer 4: all of these
380.12(2), (4), and (5)
Metal multioutlet assemblies can extend through (not run within) dry partitions if arrangements are made for removing the cap or cover on all _____ portions and no outlet is located within the partitions.
Answer 1: exposed
Answer 2: concealed
Answer 3: uninsulated
Answer 4: none of these
Answer 1: exposed
380.76
Article 386 covers the use installation and construction specifications for surface _____ and associated fittings.
Answer 1: nonmetallic raceways
Answer 2: metal raceways
Answer 3: metal wireways
Answer 4: enclosures
Answer 2: metal raceways
386.1
Unbroken lengths of surface metal raceways can be run through dry _____.
Answer 1: walls
Answer 2: partitions
Answer 3: floors
Answer 4: all of these
Answer 4: all of these
386.10(4)
The number of conductors or cables installed in surface metal raceways shall not _____.
Answer 1: exceed more than 30 percent of the inside diameter
Answer 2: be greater than the number for which it was designed
Answer 3: be more than 75 percent of the cross-sectional area
Answer 4: be more than that which is permitted in Table 312.6(A)
Answer 2: be greater than the number for which it was designed
386.22
The ampacity adjustment factors of 310.15(C)(1) shall not apply to conductors installed in surface metal raceways where the _____.
Answer 1: cross-sectional area exceeds 4 sq in.
Answer 2: current-carrying conductors do not exceed 30 in number
Answer 3: total cross-sectional area of all conductors does not exceed 20 percent of the interior cross-sectional area of the raceway
Answer 4: all of these
Answer 4: all of these
386.22(1), (2), and (3)
Splices and taps in surface metal raceways without removable covers shall be made only in _____.
Answer 1: boxes
Answer 2: raceways
Answer 3: conduit bodies
Answer 4: none of these
Answer 1: boxes
386.56
Surface metal raceway enclosures providing a transition from other wiring methods shall have a means for connecting a(an) _____ conductor.
Answer 1: grounded
Answer 2: ungrounded
Answer 3: equipment grounding
Answer 4: all of these
Answer 3: equipment grounding
386.60.
Cable tray systems including ladder ventilated trough ventilated channel solid bottom and other similar structures are covered within Article _____.
Answer 1: 358
Answer 2: 362
Answer 3: 366
Answer 4: 392
Answer 4: 392
392.1
Single conductor cables and single insulated conductors used in cable trays shall be marked on the surface for use in cable trays and shall be no smaller than _____.
Answer 1: 1 AWG
Answer 2: 1/0 AWG
Answer 3: 2/0 AWG
Answer 4: 4/0 AWG
Answer 2: 1/0 AWG
392.10(B)(1)(a)
Cable tray systems shall be permitted to have mechanically discontinuous _____ between cable tray runs or between cable tray runs and equipment.
Answer 1: portions
Answer 2: segments
Answer 3: pieces
Answer 4: any of these
Answer 2: segments
392.18(A)
Cable trays shall be _____ except as permitted by 392.18(D).
Answer 1: exposed
Answer 2: accessible
Answer 3: readily accessible
Answer 4: exposed and accessible
Answer 4: exposed and accessible
392.18(E)
Where single conductor cables comprising each phase neutral or grounded conductor of a circuit are connected in parallel in a cable tray the conductors shall be installed _____ to prevent current imbalance in the paralleled conductors due to inductive reactance.
Answer 1: in groups consisting of not more than three conductors per phase or neutral or grounded conductor
Answer 2: in groups consisting of not more than one conductor per phase neutral or grounded conductor
Answer 3: as individual conductors securely bound to the cable tray
Answer 4: in separate groups
Answer 2: in groups consisting of not more than one conductor per phase neutral or grounded conductor
392.20(C)
Cable trays shall be supported at _____ in accordance with the installation instructions.
Answer 1: intervals
Answer 2: portions
Answer 3: segments
Answer 4: any of these
Answer 1: intervals
392.30(A)
Cable _____ made and insulated by approved methods can be located within a cable tray provided they are accessible and do not project above the side rails where the splices may be subject to physical damage.
Answer 1: connections
Answer 2: jumpers
Answer 3: splices
Answer 4: conductors
Answer 3: splices
392.56
Steel or aluminum cable tray systems are permitted to be used as an equipment grounding conductor provided the cable tray sections and fittings are identified as _____ among other requirements.
Answer 1: an equipment grounding conductor
Answer 2: special equipment
Answer 3: industrial grade
Answer 4: all of these
Answer 1: an equipment grounding conductor
392.60(B)(1)
