NEC CHALLANGE EXAM 1

Snap switches rated ______ or less directly connected to aluminum conductors shall be listed and marked CO/ALR. A. 15 A B. 20 A C. 25 A D. 30 A

20A NEC SECTION : 404.14(C)

Alternation-current or direct-current general-use snap switched ma be sued for control of inductive loads not exceeding _______ present of the ampere rating of the switch at the applied voltage. A. 50 B. 75 C. 90 D. 100

50 NEC SECTION : 404.14(B)(2)

Type MC cable installed horizontally through wooden or metal framing members are considered secured and supported where such support does not exceed _______-ft intervals. A. 3 B. 4 C. 6 D. 8

6 NEC SECTION: 330.30(C)

The minimum radius of a field bend on trade size 1 1/4 RMC is ______ in. A. 7 B. 8 C. 10 D. 14

8 NEC SECTION : 344.24 & CHAPTER 9 , TABLE 2

galvanized steel and stainless steel EMT, elbows , couplings and fittings can be installed in concrete, in direct contact with the earth, or in areas subject to severe corrosive influences where ____ a. protected by corrosion protection b. approved as suitable for the condition c. a and b d. listed for wet locations

A & B : a. protected by corrosion protection b. approved as suitable for the condition NEC SECTION: 358.10(B)(1)

Cable trays shall be _______ except as permitted by 392.18(D). A. Exposed B. Accessible C. Concealed D. A and B

A & B: A. Exposed B. Accessible NEC SECTION : 392.18(E)

Flexible cords and flexible cables shall be protected by ______ where passing through poles in covers, other boxes, or similar enclosures. A. Bushings B. Fittings C. A or B D. None of these

A OR B : A. Bushings B. Fittings NEC SECTION : 400.17

ENT and fittings can be______, provided fittings identified for this purpose are used. a. encased in poured concrete b. embedded in a concrete slab on. grade where the tubings placed on sand or approved screenings c. a or b d. none

A OR B: a. encased in poured concrete b. embedded in a concrete slab on. grade where the tubings placed on sand or approved screenings NEC SECTION: 362.10(6)

Metal wireways shall be permitted for _____. A. Exposed work B. Totally concealed work C. Wet locations if listed for the purpose D. A and C

A and C : A. Exposed work C. Wet locations if listed for the purpose NEC SECTION: 376.10(1) AND (3)

the ampacity adjustment factors of 310.15(B)(3)(a) shall not apply to conductors installed in surface metal raceways where the ____ a. cross-sectional area exceeds 4 sq in b. current-carrying conductors do not exceed 30 in number c. total cross-sectional area of all conductors does not exceed 20 percent of the interior cross-sectional area of the raceway d. all of these

All of these NEC SECTION: 386.22(1), (2), & (3)

A multi outlet assembly shall not be installed _______. A. In hoistways B. Where subject to severe physical damage C. Where subject to corrosive vapors D. All of these

All of these: *In hoistways *Where subject to severe physical damage *Where subject to corrosive vapors NEC SECTION : 380.12(2), (4), AND (5)

Joints between lengths of ENT, couplings, fittings, and boxes shall be made by ______. A. A qualified person B. Set screw fittings C. An approved method D. Exothermic welding

An approved method NEC SECTION: 362.48

IMC shall be secured ______. A. By fastening with 3 ft of each outlet box, junction box, device box, cabinet, conduit body, or other conduit termination B. 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 C. Except when the IMC is within 3 ft of the service head for an above-the-food termination of a mast D. Any of these

Any of these NEC SECTION : 342.30(A)(1), (2), AND (3)

Materials such as straps, bolts, and so forth, associated with the installation of RMC in wet locations shall be ______. A. Weatherproof B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant D. B or C

B OR C: B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant NEC SECTION : 344.10(D)

Materials such an straps, bolts, screws, and so forth, which are associated with the installation of IMC in wet locations shall be ______. A. Weatherproof B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant D. B or C

B or C : B. Protected against corrosion by corrosion-resistant materials C. Corrosion resistant NEC SECTION: 342.10(D)

Bends in PVC conduit shall ______ between pull points. A. Not be made B. Not be limited in degrees C. Be limited to 360 degrees D. Be limited to 180 degrees

Be limited to 360 degrees NEC SECTION : 352.26

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 A. Concealed B. Exposed C. Hazardous D. Completed

Concealed NEC SECTION : 350.30(A)

General-use ______ switches shall be used only to control permanently installed incandescent luminaries unless listed for control of other loads and installed accordingly. A. Dimmer B. Fan speed control C. Timer D. All of these

Dimmer NEC SECTION : 404.14(E)

________ is an unthreaded thin wall raceway of circular cross section designed for the routing and physical protection fo electrical conductors and cables when joined together with listed fittings. A. LFNC B. EMT C. NUCC D. RTRC

EMT NEC SECTION: 358.2 ELECTRICAL METALLIC TUBING(EMT)

Type UF cable can be used for service conductors. A. True B. False

FALSE NEC SECTION : 340.12(1)

____ is a raceway of circular cross section made of a helically wound, former, interlocked metal strip. a. type MC cable b. type AC cable c. LFMC d. FMC

FMC NEC SECTION: 348.2

Conductors larger than that for which the metal wireways is designed can be installed in an metal wireways. A. True B. False

False NEC SECTION: 376.21

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. A. Walls B. Trusses C. Rafters D. Framing members

Framing members NEC SECTION : 344.30(B)(4)

Conductors rated at a temperature _______ than the listed lemperature rating fo PVC conduit shall be permitted to be installed in PVC conduit, provided the conductors are not spiraled at a temperature above the raceway's listed temperature rating. A. Lower B. The same as C. Higher D. A or B

Higher NEC SECTION: 352.10(I)

Metal wireways can press transversely thought a wall _____ A. If the length passing through the wall is unbroken B. If te walll is of fire-rated construction C. In hazardous (classified) locations D. If the walll is not of fire-rated construction

If the length passing through the wall is unbroken NEC SECTION: 376.10(4)

___ is a raceway of circular cross section having an outer liquid tight , nonmetallic , sunlight-resistant jacket over an inner flexible metal core. A. FMC B. LFNMC C. LFMC D. NONE

LFMC NEC SECTION: 350.2 LIQUIDTIGHT FLEXIBLE METAL CONDUIT(LFMC)

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 are subject to physical damage. a. connections b. jumpers c. splices d. conductors

Splices NEC SECTION: 392.56

type __ cable is a factory assembly of two or more insulated conductors with or without associated bare of covered grounding conductors under a nonmetallic jacket A. NM B. TC C. SE D. UF

TC NEC SECTION: 336.2 POWER & CONTROL TRAY CABLE, TYPE TC

Type NM and Type NMC cables shall be permitted in___ except as prohibited in 334.12 a. one and two family dwellings and their attached/detached garages and shortage buildings b. multifamily dwellings permitted to be or types III, IV and V construction c. other structures permitted to be of types III, IV and V construction d. any of these

any of these NEC SECTION: 334.10(1), (2), & (3)

LFMC shall be supported and secured________. a. at intervals not exceeding 4 1/2 ft b. within 8 in on each side of box where fished c. where fished d. at intervals not exceeding 6 ft

at intervals not exceeding 4 1/2 ft NEC SECTION : 350.30(A)

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. a. brushing b. duct seal c. electrical tape d. seal fitting

brushing NEC SECTION : 344.46

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. a. brushing b. duct seal c. electrical tape d. seal fittings

brushing NEC SECTION: 342.46

each run of cable tray shall be ____ before the installation of cables. a. tested for 25 ohms resistance b. insulated c. completed d. all of these

completed NEC SECTION: 392.18(B)

the use of LFMC shall be permitted for ___ a. direct burial where listed and marked for the purpose b. exposed work c. concealed work d. all of these

direct burial where listed and marked for the purpose NEC SECTION: 350.10(3)

True or False: Type NM cables shall not be used in one- and two-family dwellings exceeding three floors above grade.

false NEC SECTION : 334.10(1)

ENT is composed of a material resistant to moisture and chemical atmospheres and is _____. a. flexible b. flame retardant c. fireproof d. flammable

flame retardant NEC SECTION: 362.2

where practicable , contact of dissimilar metals shall be avoided in an IMC raceway installation to prevent the possibility of ______ a. corrosion b. galvanic action c. shorts d. none

galvanic action NEC SECTION: 342.14

treadless couplings approved for use with IMC in wet locations shall be a. rainproof b. listed for wet locations c. moistureproof d. concrete-tight

listed for wet locations NEC SECTION : 342.42(A)

Threadless couplings and connectors used with RMC in wet locations shall be _____. a. listed for wet locations b. listed for damp locations c. nonabsorbent d. weatherproof

listed for wet locations NEC SECTION : 344.42(A) & 314.15

Cut ends of FMC shall be trimmed or otherwise finished to remove rough edges, except where fittings___________. a. are the crimp-on type b. thread into the convolutions c. contain insultaded throats d. are listed for grounding

thread into the convolutions NEC SECTION: 348.28

Fixture wires shall not be used for branch-circuit wiring, except as permitted in other articles of the code A. True B. False

true NEC SECION: 402.12

When metal wireways are used, the number of conductors or cables that can be enclosed, and their ampacity, shall comply with 376.22(A) and (B). A. true B. false

true NEC SECTION : 376.22

When grouping conductors of switch loops in the same raceway, it is not required to include a grounded conductor a. true b. false

true NEC SECTION : 404.2(A) Ex

Running threads shall not be used on IMC for connection and couplings. A. True B. False

true NEC SECTION :342.42(B)

Type NM cable shall closely follow the surface of the building finish or running boards when run exposed. a. true b. false

true NEC SECTION: 334.15(A)

Horizontal runs of IMC supported by openings through framing members at intervals not exceeding 10 ft and securely fastened within 3 ft of terminations shall be permitted. a. true b. false

true NEC SECTION: 342.30(B)(4)

PVC conduit shall be permitted for s posed work where subject to physical damage if identified for such use. A. True B. False

true NEC SECTION: 352.10(F)

the cut ends of PVC conduit shall be trimmed to remove the burrs and rough edges a. true b. false

true NEC SECTION: 352.28

Type UF cable is permitted to be used for inside wiring. A. True B. False

true NEC SECTION : 340.10(3)

Field bends in PVC conduit shall be made only _____. a. by hand forming the bend b. with bending equipment identified for the purpose c. with truck exhaust pipe d. by use of open flame torch

with bending equipment identified for the purpose NEC SECTION: 352.24