NEC Prep Quiz Practice Quiz 5 Random Order [90.1-406.12]

27. __________ equipment excludes dust and doesn't permit arcs, spars, or heat inside the enclosure to cause ignition of accumulations or atmospheric suspensions of a specified dust on or in the vicinity outside of the enclosure.

100 Dust Ignition proof [as applied to Hazardous (Classified) Locations]

48. Premises wiring includes _____ wiring from the service point or power source to the outlets.

100 Premises Wiring (System) interior and exterior

41. A raintight enclosure is constructed or protected so that exposure to a beating rain will not result in the entrance of water under specified test conditions.

100 Raintight TRUE

32. Where required by the Code, markings or labels on all electrical eq

110.21(A)(1) the environment involved

37. In judging equipment for approval, considerations such as ______ shall be evaluated.

110.3(A)(2), (3), and (6) mechanical strength, wire-bending space, arcing effects

23. The screw shell of a luminaire or lamp holder shall be connected to the _______.

200.10(C) grounded conductor

46. in addition to the number of branch circuits required by other parts of 210.11, at least _____ 120V, 20A branch circuit shall be provided to the supply the bathroom(s) receptacle outlet(s).

210.11(C)(2) one

20. The number of receptacle outlets for guest rooms in hotels and motels shall not be less than that required for a dwelling unit. These receptacles can be located to be convenient for permanent furniture layout, but at least ______ receptacle outlet(s) shall be readily accessible.

210.60(B) two

12. Ground-fault circuit-interrupter protection shall be provided for outlets not exceeding 240V that supply boat hoists installed in dwelling unit locations.

210.8(C) TRUE

11. Service-entrance cables which are not installed underground, where subject to physical damage, shall be protected by ________.

230.50(B)(1)(1),(2), and (3) rigid metal conduit, IMC or Schedule 80 PVC conduit.

2. In a multiple-occupancy building where electric service and electrical maintenance are provided by the building management under continuous building management supervision, the service disconnecting means can be accessible to authorized _____ only.

230.72(C) EX management personnel

28. Service conductors installed as unjacked multiconductor cable shall have a minimum clearance of _____ ft from windows that are designed to be opened doors, porches, balconies, ladders, stairs, fire escapes, or similar locations.

230.9(A) 3

31. As defined by 230.95, the rating of the service disconnect shall be considered to be the rating of the largest ______ that can be installed or the highest continuous current trip setting for which the actual overcurrent device installed in a circuit breaker is rated or can be adjusted.

230.95 fuse

17. The armor of Type AC cable is recognized by the NEC as an equipment grounding conductor.

250.118(8) TRUE

47. An equipment grounding conductor shall be identified by _______.

250.119 a continuous outer finish that is green, being bare, a continuous outer finish that is green with one or more yellow stripes.

24. Equipment grounding conductors of the wire type shall not be required to be larger than the circuit conductors.

250.122(A) TRUE

8. Equipment grounding conductors for feeder taps are not required to be larger than the tap conductors.

250.122(G) TRUE

15. A _____ shall be used to connect the grounding terminal of a grounding-type receptacle to a grounded box.

250.146 equipment bonding jumper

18. Where a main bonding jumper is a screw only, the screw shall be identified with a(n) _____ that shall be visible with the screw installed.

250.28(B) green finish

25. Main bonding jumpers and system bonding jumpers shall not be smaller than specified in ______.

250.28(D)(1) Table 250.102(C)(1)

33. A grounding electrode shall be required fi a building or structure is supplied by a feeder.

250.32(A) TRUE

40. Local metal underground systems or structures such as ______ are permitted to serve as grounding electrodes.

250.52(A)(8) piping systems, underground tanks, underground metal well casings that are not bonded to a metal water pipe.

13. Metal enclosures and raceways containing service conductors shall be connected to the grounded system conductor if the electrical system is grounded.

250.8 TRUE

29. A bushing shall be permitted in lieu of a box or terminal where the conductors emerge from a raceway and enter or terminate at equipment such as open switchboards, unenclosed control equipment, or similar equipment

300.16(B) TRUE

9. Raceways shall be ______ between outlet, junction, or splicing points prior to the installation of conductors.

300.18(A) installed complete

30. When installed under metal-corrugated sheet roof decking, the rules for spacing from roof decking apply equally to rigid metal conduit and intermediate metal conduit.

300.4(E) EX FALSE

44. When installed PVC conduit underground without concrete cover, there shall be a minimum of ______ in. of cover.

300.5(A) and Table 300.5 Column 3 18

10. Where installed in raceways, conductors ______ AWG and larger shall be stranded, unless specifically permitted or required elsewhere in the NEC.

310.106(C) 8

26. The ampacity adjustment factors of Table 310.15(B)(3)(a) do not apply to Type AC or Type MC cable without an overall outer jacket, if which of the following condition(s) is(are) met?

310.15(B)(3)(a)(4) Each cable has not more than three current-carrying conductors, the conductors are 12 AWG Copper, No more than 20 current-carrying conductors are installed without maintaining space.

49. Where raceways or cables enter above the level of uninsulated live parts of cabinets, cutout boxes, and meter socket enclosures in a wet location, a(n) _____ shall be used.

312.2 fitting listed for wet locations

3. Nonmetallic-sheathed cables can enter the top of surface-mounted cabinets, cutout boxes, and meter socket enclosures through nonflexible raceways not less than 18 in. and not more than _____ ft in length if all of the required conditions are met.

312.5(C) EX 10

22. Equipment grounding conductor(s), and not more than ______ fixture wires smaller than 14 AWG shall be permitted to be omitted from the calculations where they enter the box from a domed luminaire or similar canopy and terminate within that box.

314.16(B)(1) EX

7. When armored cable is run parallel to the sides of rafters, studs, or floor joists in an accessible attic, the cable shall be protected with running boards.

320.23(B) FALSE

36. Type AC cable shall be secured at intervals not exceeding 4 1/2 ft and within ______ in. of every outlet box, cabinet, conduit body, or fitting.

320.30(B) 12

5. IMC c an be installed in or under cinder fill subject to permanent moisture ________.

342.10(C) where the conduit is not less than 18 in. under the fill, when protect ted on all sides by 2 in. of noncided concrete, where protected by corrosion protection approved for the condition.

38. Threadless couplings and connectors used with RMC buried in masonry or concrete shall be the ________ type

344.42(A) concrete tight

45. Liquid tight flexible metal conduit shall be securely fastened by a means approved by the authority having jurisdiction within _____ of termination.

350.30(A) 1 ft

43. When EMT is installed in wet locations, all support, bolts, straps, and screws shall be _____.

358.10(D) of corrosion-resistant materials, protected against corrosion by corrosion-resistant materials

35. Cut ends of ENT shall be trimmed inside and _____ to remove rough edges

362.28 outside

39. Flexible cords and flexible cables shall be connected to fittings so that tension will not be transmitted to joints or terminals by ______.

400.14 Note knotting the cord, winding the cord with tape, fittings designed for the purpose

16. in industrial establishments where conditions of maintenance and supervision ensure that only qualified persons service the installation, flexible cords and flexible cables can be installed in above ground raceways that are no longer than _____ ft, to protect the flexible cord or flexible cable from physical damage.

400.17 50 ft

1. Conductors within flexible cords and flexible cables shall not be associated together in such a way that the ________ temperature of the conductors is exceeded.

400.5(B) limiting

14. Metal enclosures for switches or circuit breakers shall be connected to the circuit _____ conductor.

404.12 equipment grounding

42. Switches or circuit breakers shall not disconnect the grounded conductor of a circuit unless the switch or circuit breaker _______.

404.2(B) EX simultaneously disconnects all conductors of the circuit.

6. A snap switch with an integral nonmetallic enclosure complying with 300.15€is required to be connected to an equipment grounding conductor.

404.9(B) EX 3 FALSE

4. Nonlocking-type 15A and 20A, 125V and 250V receptacles in a dwelling unit shall be listed as tamper resistant except _______.

406.12 EX to (1), (2), (3), (4), (5), (6), and (7): (1), (2), (3) receptacles located more than 5 1/2 ft above the floor, receptacles that are part of a luminaire or appliance, a receptacle located within the dedicated space for an appliance that, in normal use, is not easily moved from one place to another.

50. Receptacles incorporating an isolated grounding conductor connection intended for the reduction of electrical noise shall be identified by ______ on the face of the receptacle.

406.3(D) an orange triangle

21. Receptacles mounted in boxes set back from the finished surface shall be installed so that the mounting _____ of the receptacle is held rigidly at the finished surface.

406.5(A) yoke or strap

19. Receptacles mounted in boxes flush with the finished surface or projecting beyond it shall be installed so that the mounting yoke or strap of the receptacle is ______.

406.5(B) held rigidly against the box or box cover

34. "_______" is defined as t he area between the top of direct-burial cable and the top surface of the finished grade.

Table 300.5, Note 1 Cover