Understanding NEC Articles 340, 342,344, 350,352 & 356 Flashcards
Article 340 covers the use installation and construction specifications for underground feeder and branch-circuit cable Type _____.
Answer 1: USE
Answer 2: UF
Answer 3: UFC
Answer 4: NMC
Answer 2: UF
340.1
Type UF cable and associated fittings shall be _____.
Answer 1: identified
Answer 2: approved
Answer 3: listed
Answer 4: labeled
Answer 3: listed
340.6
A permitted wiring method for use in underground installations is _____.
Answer 1: Type SE cable
Answer 2: Type UF cable
Answer 3: Type THHN in PVC conduit
Answer 4: Type NM in a raceway
Answer 2: Type UF cable
340.10(1)
Type UF cable can be used as service entrance cable.
Answer 1: TRUE
Answer 2: FALSE
Answer 2: FALSE
340.12(1)
Type UF cable shall not be used in _____.
Answer 1: motion picture studios
Answer 2: storage battery rooms
Answer 3: hoistways
Answer 4: all of these
Answer 4: all of these
340.12(4), (5), and (6)
Type UF cable shall not be used _____.
Answer 1: in any hazardous (classified) location except as otherwise permitted in this Code
Answer 2: embedded in poured cement concrete or aggregate
Answer 3: where exposed to direct rays of the sun unless identified as sunlight resistant
Answer 4: all of these
Answer 4: all of these
340.12(7), (8), and (9)
Type UF cable shall not be used where subject to physical damage.
Answer 1: TRUE
Answer 2: FALSE
Answer 1: TRUE
340.12(10)
The ampacity of Type UF cable shall be that of _____ conductors in accordance with 310.14.
Answer 1: 60°C
Answer 2: 75°C
Answer 3: 90°C
Answer 4: 105°C
Answer 1: 60°C
340.80.
Article _____ covers the use installation and construction specifications for intermediate metal conduit (IMC) and associated fittings.
Answer 1: 342
Answer 2: 348
Answer 3: 352
Answer 4: 356
Answer 1: 342
342.1
IMC elbows couplings and fittings shall be permitted to be installed in concrete in direct contact with the earth in direct burial applications or in areas subject to severe corrosive influences where protected by corrosion protection _____ for the condition.
Answer 1: identified
Answer 2: approved
Answer 3: listed
Answer 4: suitable
Answer 2: approved
342.10(B)
Type IMC conduit shall be permitted to be installed where subject to _____ physical damage.
Answer 1: severe
Answer 2: minor
Answer 3: minimal
Answer 4: massive
Answer 1: severe
342.10(E)
Where practicable contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of _____.
Answer 1: corrosion
Answer 2: galvanic action
Answer 3: short circuits
Answer 4: ground faults
Answer 2: galvanic action
342.14
IMC shall be secured _____.
Answer 1: by fastening within 3 ft of each outlet box junction box device box cabinet conduit body or other conduit termination
Answer 2: within 5 ft of a box or termination fitting when structural members do not readily permit the raceway to be secured within 3 ft of the termination
Answer 3: except when the IMC is within 3 ft of the service head for an above-the-roof termination of a mast
Answer 4: any of these
Answer 4: any of these
342.30(A)(1), (2), and (3)
Trade size 1 IMC run straight with threaded couplings shall be supported at intervals not exceeding _____.
Answer 1: 8 ft
Answer 2: 10 ft
Answer 3: 12 ft
Answer 4: 15 ft
Answer 3: 12 ft
342.30(B)(2) and Table 344.30(B)
Horizontal runs of IMC supported by openings through framing members at intervals not exceeding _____ and securely fastened within 3 ft of terminations shall be permitted.
Answer 1: 5 ft
Answer 2: 8 ft
Answer 3: 10 ft
Answer 4: 15 ft
Answer 3: 10 ft
342.30(B)(4)
Threadless couplings approved for use with IMC in wet locations shall be _____.
Answer 1: rainproof
Answer 2: listed for wet locations
Answer 3: moistureproof
Answer 4: concrete-tight
Answer 2: listed for wet locations
342.42(A)
Where IMC enters a box fitting or other enclosure _____ shall be provided to protect the wire from abrasion unless the design of the box fitting or enclosure affords equivalent protection.
Answer 1: a bushing
Answer 2: duct seal
Answer 3: electrical tape
Answer 4: seal fittings
Answer 1: a bushing
342.46
Article 344 covers the use installation and construction specifications for _____ conduit and associated fittings.
Answer 1: intermediate metal
Answer 2: rigid metal
Answer 3: electrical metallic
Answer 4: aluminum metal
Answer 2: rigid metal
344.1
RMC and fittings are permitted to be installed in concrete in direct contact with the earth in direct burial applications or in areas subject to severe corrosive influences when protected by _____ approved for the condition.
Answer 1: ceramic
Answer 2: corrosion protection
Answer 3: backfill
Answer 4: a natural barrier
Answer 2: corrosion protection
344.10(B)(1)
Type RMC conduit shall be permitted to be installed where subject to _____ physical damage.
Answer 1: severe
Answer 2: minor
Answer 3: minimal
Answer 4: massive
Answer 1: severe
344.10(E)
RMC 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
344.20(A)<br></br>2023 UNEC1, Chapter 3
The total degrees of bends in a run of RMC shall not exceed _____ between pull points.
Answer 1: 120 degrees
Answer 2: 180 degrees
Answer 3: 270 degrees
Answer 4: 360 degrees
Answer 4: 360 degrees
344.24(B)
Cut ends of RMC shall be _____ or otherwise finished to remove rough edges.
Answer 1: threaded
Answer 2: reamed
Answer 3: painted
Answer 4: galvanized
Answer 2: reamed
344.28
PVC-coated RMC shall be _____ in accordance with manufacturer’s instructions to prevent damage to the exterior coating.
Answer 1: threaded
Answer 2: cut
Answer 3: bent
Answer 4: none of these
Answer 1: threaded
344.28
RMC shall be securely fastened within _____ of each outlet box junction box device box cabinet conduit body or other conduit termination.
Answer 1: 3 ft
Answer 2: 4 ft
Answer 3: 5 ft
Answer 4: 6 ft
Answer 1: 3 ft
344.30(A)(1)
Where framing members do not readily permit fastening RMC may be fastened within _____ of each outlet box junction box device box cabinet conduit body or other conduit termination.
Answer 1: 3 ft
Answer 2: 4 ft
Answer 3: 5 ft
Answer 4: 8 ft
Answer 3: 5 ft
344.30(A)(2)
Straight runs of trade size ¾ ridgid metal conduit should be fastened in place at intervals not exceeding _____.
Answer 1: 10 ft
Answer 2: 20 ft
Answer 3: 30 ft
Answer 4: 5 ft
Answer 1: 10 ft
344.30(B)(1)
Horizontal runs of RMC supported by openings through _____ at intervals not exceeding 10 ft and securely fastened within 3 ft of termination points shall be permitted.
Answer 1: walls
Answer 2: trusses
Answer 3: rafters
Answer 4: framing members
Answer 4: framing members
344.30(B)(4)
Threadless couplings and connectors used with RMC buried in masonry or concrete shall be the _____ type.
Answer 1: raintight
Answer 2: wet and damp location
Answer 3: nonabsorbent
Answer 4: concrete tight
Answer 4: concrete tight
344.42(A)
Threadless couplings and connectors used with RMC in wet locations shall be _____.
Answer 1: listed for wet locations
Answer 2: listed for damp locations
Answer 3: nonabsorbent
Answer 4: weatherproof
Answer 1: listed for wet locations
344.42(A) and 314.15
Where RMC enters a box fitting or other enclosure _____ shall be provided to protect the wire from abrasion unless the design of the box fitting or enclosure affords equivalent protection.
Answer 1: a bushing
Answer 2: duct seal
Answer 3: electrical tape
Answer 4: seal fittings
Answer 1: a bushing
344.46
The use installation and construction specifications for liquidtight flexible metal conduit (LFMC) and associated fittings are covered within Article _____.
Answer 1: 300
Answer 2: 334
Answer 3: 350
Answer 4: 410
Answer 3: 350
350.1
The minimum size liquid tight flexible metal conduit is _____.
Answer 1: trade size 3⁄8
Answer 2: trade size ½
Answer 3: trade size ¾
Answer 4: trade size 1
Answer 2: trade size ½
350.20(A)
Liquidtight flexible metal conduit shall be securely fastened by a means approved by the authority having jurisdiction within _____ of termination.
Answer 1: 6 in.
Answer 2: 10 in.
Answer 3: 12 in.
Answer 4: 10 ft
Answer 3: 12 in.
350.30(A)
Where used to securely fasten LFMC cable ties shall be _____ for securement and support.
Answer 1: identified
Answer 2: labeled
Answer 3: marked
Answer 4: listed and identified
Answer 4: listed and identified
350.30(A)
LFMC shall not be required to be secured or supported where fished between access points through _____ spaces in finished buildings or structures and supporting is impractical.
Answer 1: concealed
Answer 2: exposed
Answer 3: hazardous (classified)
Answer 4: completed
Answer 1: concealed
350.30(A) Ex 1
For liquidtight flexible metal conduit if flexibility is necessary after installation unsecured lengths from the last point the raceway is securely fastened shall not exceed _____.
Answer 1: 3 ft for trade sizes ½ through 1¼
Answer 2: 4 ft for trade sizes 1½ through 2
Answer 3: 5 ft for trade sizes 2½ and larger
Answer 4: all of these
Answer 4: all of these
350.30(A) Ex 2(1), (2), and (3)
Where flexibility is not required after installation liquidtight flexible metal conduit shall be permitted to be used as an equipment grounding conductor when installed in accordance with _____.
Answer 1: 250.102
Answer 2: 250.118(A)(5)
Answer 3: 250.118(A)(6)
Answer 4: 348.6
Answer 3: 250.118(A)(6)
350.60(A)
When LFMC is used to connect equipment where flexibility is necessary to minimize the transmission of vibration from equipment or for equipment requiring movement after installation a(an) _____ conductor shall be installed.
Answer 1: main bonding
Answer 2: grounded
Answer 3: equipment grounding
Answer 4: grounding electrode
Answer 3: equipment grounding
350.60(B)
Article 352 covers the use installation and construction specifications for _____ and associated fittings.
Answer 1: ENT
Answer 2: RMC
Answer 3: IMC
Answer 4: PVC
Answer 4: PVC
352.1
Extreme _____ may cause PVC conduit to become brittle and therefore more susceptible to damage from physical contact.
Answer 1: sunlight
Answer 2: corrosive conditions
Answer 3: heat
Answer 4: cold
Answer 4: cold
352.10 Informational Note
PVC conduit shall be permitted to be _____.
Answer 1: encased in concrete
Answer 2: used for the support of luminaires
Answer 3: installed in movie theaters
Answer 4: none of these
Answer 1: encased in concrete
352.10 (B)
PVC conduit is permitted in locations subject to severe corrosive influences and where subject to chemicals for which the materials are specifically _____.
Answer 1: approved
Answer 2: identified
Answer 3: listed
Answer 4: non-hazardous
Answer 1: approved
352.10(C)
Schedule 40 PVC conduit shall be permitted for _____ work.
Answer 1: rough-in
Answer 2: exposed
Answer 3: airplane
Answer 4: automobile
Answer 2: exposed
352.10(G)
The number of conductors permitted in PVC conduit 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
352.22
Field bends in PVC conduit shall be made only _____.
Answer 1: by hand forming the bend
Answer 2: with identified bending equipment
Answer 3: with a truck exhaust pipe
Answer 4: by use of an open flame torch
Answer 2: with identified bending equipment
352.24(A)
The total degrees of bends in a run of PVC shall not exceed _____ between pull points.
Answer 1: 120 degrees
Answer 2: 180 degrees
Answer 3: 270 degrees
Answer 4: 360 degrees
Answer 4: 360 degrees
352.24(B)
The _____ ends of PVC conduit shall be trimmed inside and outside to remove the burrs and rough edges.
Answer 1: cut
Answer 2: new
Answer 3: old
Answer 4: blunt
Answer 1: cut
352.28
PVC conduit shall be securely fastened within _____ of each box.
Answer 1: ½ ft
Answer 2: 1 ft
Answer 3: 2 ft
Answer 4: 3 ft
Answer 4: 3 ft
352.30(A)
PVC conduit trade sizes 1¼ to 2 shall be supported no greater than _____ between supports.
Answer 1: 3 ft
Answer 2: 4 ft
Answer 3: 5 ft
Answer 4: 6 ft
Answer 3: 5 ft
352.30(B) and Table 352.30(B)
Expansion fittings for underground runs of direct buried PVC conduit emerging from the ground shall be provided above grade when required to compensate for _____.
Answer 1: earth settling
Answer 2: earth movement
Answer 3: frost heave
Answer 4: all of these
Answer 4: all of these
352.44(B)
Where a PVC conduit enters a box fitting or other enclosure a _____ or adapter shall be provided to protect the wire from abrasion unless the box fitting or enclosure design provides equivalent protection.
Answer 1: bushing
Answer 2: connector
Answer 3: coupling
Answer 4: insulator
Answer 1: bushing
352.46
Joints between PVC conduit couplings fittings and boxes shall be made by a(an) _____ method.
Answer 1: listing
Answer 2: marking
Answer 3: approved
Answer 4: identified
Answer 3: approved
352.48
Where equipment grounding is required a separate grounding conductor shall be installed in Type PVC conduit except where the _____ is used to ground equipment as permitted in 250.142.
Answer 1: grounding jumper
Answer 2: grounded conductor
Answer 3: bonding jumper
Answer 4: bonded conductor
Answer 2: grounded conductor
352.60 Ex 2
Article _____ covers the use installation and construction specifications for liquidtight flexible nonmetallic conduit (LFNC) and associated fittings.
Answer 1: 300
Answer 2: 334
Answer 3: 350
Answer 4: 356
Answer 4: 356
356.1
LFNC shall be permitted to be used exposed or concealed in locations subject to severe _____ influences or where subject to chemicals for which the materials are specifically approved.
Answer 1: corrosive
Answer 2: wet
Answer 3: dry
Answer 4: damp
Answer 1: corrosive
356.10(8)
Extreme cold can cause some types of liquidtight flexible nonmetallic conduit to become _____ and therefore more susceptible to damage from physical contact.
Answer 1: stiff
Answer 2: larger
Answer 3: weak
Answer 4: brittle
Answer 4: brittle
356.10(9) Informational Note
Liquidtight nonmetallic flexible conduit is not permitted to be used _____.
Answer 1: where subject to physical damage
Answer 2: where ambient and conductor temperatures exceed its listing
Answer 3: in lengths greater than 6 ft unless approved
Answer 4: all of these
Answer 4: all of these
356.12(1), (2), and (3)
The number of conductors permitted in LFNC 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
356.22
Bends in LFNC shall be made so that the conduit will not be damaged and the internal diameter of the conduit will not be effectively reduced. Bends can be made _____.
Answer 1: manually without auxiliary equipment
Answer 2: with bending equipment identified for the purpose
Answer 3: with any kind of conduit bending tool that will work
Answer 4: by the use of an open flame torch
Answer 1: manually without auxiliary equipment
356.24(A)
The total degrees of bends in a run of LFNC shall not exceed _____ between pull points.
Answer 1: 120 degrees
Answer 2: 180 degrees
Answer 3: 270 degrees
Answer 4: 360 degrees
Answer 4: 360 degrees
356.24(B)
Securing or supporting of LFNC is not required where installed in lengths not exceeding _____ from the last point where the raceway is securely fastened for connections within an accessible ceiling to a luminaire(s) or other equipment.
Answer 1: 3 ft
Answer 2: 6 ft
Answer 3: 8 ft
Answer 4: 10 ft
Answer 2: 6 ft
356.30(4)
When LFNC is used and equipment grounding is required a separate _____ shall be installed in the conduit.
Answer 1: grounding conductor
Answer 2: expansion fitting
Answer 3: flexible nonmetallic connector
Answer 4: grounded conductor
Answer 1: grounding conductor
356.60.
