Understanding NEC Articles 358 362 & 376 Flashcards
Article _____ covers the use installation and construction specifications for electrical metallic tubing (EMT) and associated fittings.
Answer 1: 334
Answer 2: 350
Answer 3: 356
Answer 4: 358
Answer 4: 358
358.1
When EMT is installed in wet locations all supports bolts straps and screws shall be _____.
Answer 1: made of aluminum
Answer 2: protected against corrosion
Answer 3: made of stainless steel
Answer 4: of nonmetallic materials only
Answer 2: protected against corrosion
358.10(D)
EMT shall not be used where _____.
Answer 1: subject to severe physical damage or used for the support of luminaires or other equipment except conduit bodies no larger than the largest trade size of the tubing
Answer 2: embedded in concrete
Answer 3: protected from corrosion only by enamel
Answer 4: installed in wet locations
Answer 1: subject to severe physical damage or used for the support of luminaires or other equipment except conduit bodies no larger than the largest trade size of the tubing
358.12(1) and (2)
EMT smaller than trade size _____ or larger than trade size _____ shall not be used.
Answer 1: ¾ 4
Answer 2: ½ 4
Answer 3: ½ 6
Answer 4: ¾ 6
Answer 3: ½ 6
358.20(A) and (B)
EMT run between termination points shall be securely fastened within _____ of each outlet box junction box device box cabinet conduit body or other tubing termination.
Answer 1: 12 in.
Answer 2: 18 in.
Answer 3: 2 ft
Answer 4: 3 ft
Answer 4: 3 ft
358.30(A)(2)
EMT couplings and connectors shall be made up _____.
Answer 1: of metal
Answer 2: in accordance with industry standards
Answer 3: tight
Answer 4: to be readily accessible
Answer 3: tight
358.42
Article _____ covers the use installation and construction specifications for electrical nonmetallic tubing (ENT) and associated fittings.
Answer 1: 358
Answer 2: 362
Answer 3: 366
Answer 4: 392
Answer 2: 362
362.1
Where a building is supplied with a(an) _____ automatic fire protective system ENT shall be permitted to be used within floors and ceilings exposed or concealed in buildings exceeding three floors above grade.
Answer 1: listed
Answer 2: identified
Answer 3: approved
Answer 4: NFPA 72
Answer 3: approved
362.10(2) Ex
When a building is supplied with an approved automatic _____ system ENT can be installed above any suspended ceiling.
Answer 1: fire protective
Answer 2: fire sprinkled
Answer 3: fire alarm
Answer 4: any of these
Answer 1: fire protective
362.10(5) Ex
ENT is permitted for direct earth burial.
Answer 1: TRUE
Answer 2: FALSE
Answer 2: FALSE
362.12(4)
ENT shall not be used where exposed to the direct rays of the sun unless identified as _____.
Answer 1: high-temperature rated
Answer 2: sunlight resistant
Answer 3: Schedule 80
Answer 4: suitable for the application
Answer 2: sunlight resistant
362.12(7)
The number of conductors permitted in ENT shall not exceed the percentage fill specified in _____.
Answer 1: Chapter 9 Table 1
Answer 2: Table 250.66
Answer 3: Table 310.16
Answer 4: 240.6
Answer 1: Chapter 9 Table 1
362.22
Where ENT enters a box fitting or other enclosure a bushing or _____ shall be provided to protect the wire from abrasion unless the box fitting or enclosure design provides equivalent protection.
Answer 1: adapter
Answer 2: coupling
Answer 3: connector
Answer 4: insulator
Answer 1: adapter
362.46
Joints between lengths of ENT couplings fittings and boxes shall be made by _____.
Answer 1: a qualified person
Answer 2: set screw fittings
Answer 3: an approved method
Answer 4: exothermic welding
Answer 3: an approved method
362.48
Where ENT is the wiring method and equipment grounding is required a _____ equipment grounding conductor shall be installed in the raceway.
Answer 1: separate
Answer 2: additional
Answer 3: supplemental
Answer 4: none of these
Answer 1: separate
362.60
The purpose of having all parallel conductor sets installed in metal wireways within the same group is to prevent _____ imbalance in the paralleled conductors due to inductive reactance.
Answer 1: current
Answer 2: voltage
Answer 3: inductive
Answer 4: all of these
Answer 1: current
376.20 Informational Note
No conductor larger than _____ shall be installed in a metal wireway.
Answer 1: 500 kcmil
Answer 2: 1000 kcmil
Answer 3: 2000 kcmil
Answer 4: that for which the wireway is designed
Answer 4: that for which the wireway is designed
376.21
The sum of the cross-sectional areas of all conductors at any cross section of a metal wireway shall not exceed _____ of the interior cross-sectional area of the wireway.
Answer 1: 50 percent
Answer 2: 20 percent
Answer 3: 25 percent
Answer 4: 80 percent
Answer 2: 20 percent
376.22(A)
Where insulated conductors are deflected within a metal wireway the wireway shall be sized to meet the bending requirements corresponding to _____ per terminal in Table 312.6(A).
Answer 1: one wire
Answer 2: two wires
Answer 3: three wires
Answer 4: four wires
Answer 1: one wire
376.23(A)
The distance between horizontal supports of metal wireways shall not exceed _____.
Answer 1: 6 ft
Answer 2: 8 ft
Answer 3: 10 ft
Answer 4: 15 ft
Answer 3: 10 ft
376.30(A)
Power distribution blocks in metal wireways shall not have _____ live parts exposed within a metal wireway whether or not the wireway cover is installed.
Answer 1: energized
Answer 2: concealed
Answer 3: insulated
Answer 4: uninsulated
Answer 4: uninsulated
376.56(B)(4)
