Understanding NEC Articles 340, 342,344, 350,352 & 356

Question 1

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 1

Answer 2: UF

340.1

Question 2

Type UF cable and associated fittings shall be _____.
Answer 1: identified
Answer 2: approved
Answer 3: listed
Answer 4: labeled

Answer 2

Answer 3: listed

340.6

Question 3

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 3

Answer 2: Type UF cable

340.10(1)

Question 4

Type UF cable can be used as service entrance cable.
Answer 1: TRUE
Answer 2: FALSE

Answer 4

Answer 2: FALSE

340.12(1)

Question 5

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 5

Answer 4: all of these

340.12(4), (5), and (6)

Question 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 6

Answer 4: all of these

340.12(7), (8), and (9)

Question 7

Type UF cable shall not be used where subject to physical damage.
Answer 1: TRUE
Answer 2: FALSE

Answer 7

Answer 1: TRUE

340.12(10)

Question 8

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 8

Answer 1: 60°C

340.80.

Question 9

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 9

Answer 1: 342

342.1

Question 10

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 10

Answer 2: approved

342.10(B)

Question 11

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 11

Answer 1: severe

342.10(E)

Question 12

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 12

Answer 2: galvanic action

342.14

Question 13

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 13

Answer 4: any of these

342.30(A)(1), (2), and (3)

Question 14

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 14

Answer 3: 12 ft

342.30(B)(2) and Table 344.30(B)

Question 15

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 15

Answer 3: 10 ft

342.30(B)(4)

Question 16

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 16

Answer 2: listed for wet locations

342.42(A)

Question 17

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 17

Answer 1: a bushing

342.46

Question 18

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 18

Answer 2: rigid metal

344.1

Question 19

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 19

Answer 2: corrosion protection

344.10(B)(1)

Question 20

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 20

Answer 1: severe

344.10(E)

Question 21

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 21

Answer 3: ½ 6

344.20(A)<br></br>2023 UNEC1, Chapter 3

Question 22

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 22

Answer 4: 360 degrees

344.24(B)

Question 23

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 23

Answer 2: reamed

344.28

Question 24

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 24

Answer 1: threaded

344.28

Question 25

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 25

Answer 1: 3 ft | 344.30(A)(1)

Question 26

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 26

Answer 3: 5 ft | 344.30(A)(2)

Question 27

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 27

Answer 1: 10 ft | 344.30(B)(1)

Question 28

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 28

Answer 4: framing members | 344.30(B)(4)

Question 29

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 29

Answer 4: concrete tight | 344.42(A)

Question 30

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 30

Answer 1: listed for wet locations | 344.42(A) and 314.15

Question 31

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 31

Answer 1: a bushing | 344.46

Question 32

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 32

Answer 3: 350 | 350.1

Question 33

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 33

Answer 2: trade size ½ | 350.20(A)

Question 34

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 34

Answer 3: 12 in. | 350.30(A)

Question 35

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 35

Answer 4: listed and identified | 350.30(A)

Question 36

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 36

Answer 1: concealed | 350.30(A) Ex 1

Question 37

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 37

Answer 4: all of these | 350.30(A) Ex 2(1), (2), and (3)

Question 38

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 38

Answer 3: 250.118(A)(6) | 350.60(A)

Question 39

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 39

Answer 3: equipment grounding | 350.60(B)

Question 40

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 40

Answer 4: PVC | 352.1

Question 41

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 41

Answer 4: cold | 352.10 Informational Note

Question 42

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 42

Answer 1: encased in concrete | 352.10 (B)

Question 43

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 43

Answer 1: approved | 352.10(C)

Question 44

Schedule 40 PVC conduit shall be permitted for _____ work. Answer 1: rough-in Answer 2: exposed Answer 3: airplane Answer 4: automobile

Answer 44

Answer 2: exposed | 352.10(G)

Question 45

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 45

Answer 1: Chapter 9 Table 1 | 352.22

Question 46

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 46

Answer 2: with identified bending equipment | 352.24(A)

Question 47

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 47

Answer 4: 360 degrees | 352.24(B)

Question 48

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 48

Answer 1: cut | 352.28

Question 49

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 49

Answer 4: 3 ft | 352.30(A)

Question 50

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 50

Answer 3: 5 ft | 352.30(B) and Table 352.30(B)

Question 51

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 51

Answer 4: all of these | 352.44(B)

Question 52

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 52

Answer 1: bushing | 352.46

Question 53

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 53

Answer 3: approved | 352.48

Question 54

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 54

Answer 2: grounded conductor | 352.60 Ex 2

Question 55

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 55

Answer 4: 356 | 356.1

Question 56

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 56

Answer 1: corrosive | 356.10(8)

Question 57

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 57

Answer 4: brittle | 356.10(9) Informational Note

Question 58

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 58

Answer 4: all of these | 356.12(1), (2), and (3)

Question 59

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 59

Answer 1: Chapter 9 Table 1 | 356.22

Question 60

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 60

Answer 1: manually without auxiliary equipment | 356.24(A)

Question 61

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 61

Answer 4: 360 degrees | 356.24(B)

Question 62

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 62

Answer 2: 6 ft | 356.30(4)

Question 63

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 63

Answer 1: grounding conductor | 356.60.