E4-2 Mock Journeyman’s Exam – 2008 NEC · Web viewBonded Grounded Green Service conductors...

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Practice Licensing Exam – 2014 NEC

1. When are you required to use an approved electrically conductive corrosion resistance compound on conduit threads?

A. In Class I areasB. In Class II areasC. On field cuts in corrosive areasD. In Class III areas

2. Carnival and circus overhead wiring outside of tents and concession areas where the voltage-to-ground does not exceed 150V shall maintain a vertical clearance of _____ above platforms, projections or surfaces from which they might be reached.

A. 5 ft.B. 10 ft.C. 12 ft.D. 20 ft.

3. Class III locations are those that arre hazardous because of the presence of _____________.

A. Flammable GasesB. Flammable DustsC. Easily Ignitable FibersD. Unclassified Flammable Substance

4. What is the feeder or service demand load for two 3 kw ranges?A. 4500 wB. 5000 wC. 3298 wD. 5300 w

5. If the transfer switch for a portable generator switches the _________ conductor, then the portable generator shall be grounded in accordance with NEC, Article 250.30.

A. UngroundedB. BondedC. GroundedD. Green

© 2007,2008, 2009, 2010,2011,2012,2013,2014,2015,2016 Ted “Smitty” SmithElectrical Experts Consulting

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6. Service conductors shall be considered outside the building when run under the building, if installed in conduit and buried _________ under earth.

A. 6 inchesB. 12 inchesC. 18 inchesD. 24 inches

7. Under a raised floor in an Information Technology Equipment Room, liquidtight flexible non-metallic conduit shall be permitted to enclose branch-circuit conductors for information technology communication equipment.

A. TrueB. False

8. A feeder for a motor circuit shall have a protective device with a rating or setting ________ the largest rating of the branch-circuit short-circuit and ground-fault protective device for any motor in the group, plus the sum of the full load currents of the other motors of the group.

A. equal toB. not greater thanC. less thanD. not in excess of

9. The purpose of 60/120V power systems is to reduce objectionable noise in areas containing sensitive electronic equipment. Its use is restricted to ________ occupancies that are under close supervision by qualified personnel.

A. ResidentialB. CommercialC. IndustrialD. Commercial and Industrial


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10. What is the demand on the main service entrance for a multi-family dwelling unit for the electric dryers? The service will be 240V, single phase. There are 14 apartments in the dwelling and each apartment is equipped with a 4.2 kW dryer.

A. 24,000 wB. 30,800 WC. 45,000 WD. 70,000 W

11. The outer metal sheath of interlocked MC cable is not listed as an acceptable grounding return path; however, if the interlocked MC cable contains an insulated 12 AWG or larger equipment grounding conductor, it can be used to supply branch circuits in patient care areas of health care facilities.

A. TrueB. False

12. A branch circuit voltage that exceeds 277volts to ground and does not exceed 600V between conductors is used to wire the auxiliary equipment of electrical discharge lamps mounted on poles. The minimum height of these luminaries shall not be less than ______.

A. 10 ft.B. 15 ft.C. 18 ft.D. 22 ft.

13. When sizing a pull box in a straight run which contains conductors 4 AWG or larger, the length of the pull box shall not be less than _____ times the diameter of the largest raceway for systems not over 600 volts nominal.

A. 2B. 4C. 8D. 10


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14. A 480V, three-phase service is fed by an overhead service drop. The service drop crosses the alleyway behind the building. What is the minimum clearance that must be maintained between the service drop and the alleyway ground?

A. 10 ft.B. 12 ft.C. 15 ft.D. 18 ft.

15. Water heaters having a capacity of _______ gallons or less shall have a branch-circuit rating not less than 125% of the nameplate rating of the water heater.

A. 80B. 100C. 120D. 150

16. A single device consisting of multiple receptacles comprised of ______or more receptacles shall be computed at not less than 90 VA per receptacle.

A. 5B. 4C. 3D. 2

17. Energized parts of service equipment shall be ______ so that they will not be exposed to accidental contact or they shall be guarded.

A. EnclosedB. ProtectedC. RestrictedD. Locked

18. Round boxes shall not be used with any wiring connector when a locknut or bushing is connected to the side of the box.

A. TrueB. False


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19. Dwelling unit or mobile home feeder conductors not over 400A can be sized according to 310.15 (B)(7).

A. TrueB. False

20. The additional service disconnecting means for a fire pump must be installed in the same location and grouped together with the main service disconnect.

A. TrueB. False

21. Motors shall be located so that adequate _______ is provided and so that maintenance, such as lubrication of bearings and replacing of brushes, can be readily accomplished.

A. CoolingB. VentilationC. DrainingD. None of these

22. The minimum point of attachment of the service-drop conductors to a building shall in no case be less than ________.

A. 8 ft.B. 10 ft.C. 15 ft.D. 18 ft.

23. No overcurrent device shall be inserted in a (n) __________ conductor except a circuit breaker that simultaneously opens all conductors of the circuit in service equipment.

A. UngroundedB. GroundedC. EnergizedD. Electrical


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24. The ampacity of branch-circuit conductors and the rating or setting of overcurrent protective devices supplying fixed electric heating equipment for pipelines and vessels shall not be less than _____ percent of the total load of the heaters.

A. 80B. 100C. 125D. 250

25. Wherever NM cable passes through factory or field openings in metal members, it must be protected by _______ bushings or grommets that cover the metal edges.

A. ApprovedB. IdentifiedC. MarkedD. Listed

26. Fixture wires 18 AWG TFFN are rated for _________.A. 12 ampsB. 10 ampsC. 8 ampsD. 6 amps

27. The requirement for maintaining a three-foot vertical clearance from the edge of the roof shall not apply to the final conductor span where the conductors are attached to _________.

A. The roofB. The Service MastC. A House Boat MastD. The Side of the Building


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28. Ground fault protection is required for solidly grounded wye electrical services for more than ________ volts to ground but not exceeding _______ volts phase-to-phase for each disconnect rated 1000 amperes or more.

A. 277/480B. 120/240C. 150/600D. 208/480

29. An electrician determining the box fill for a two-gang plastic nail on box that is 2 1/8 inch deep will use the cubic inch volume of a four square deep box for the purposes of box fill determination.

A. TrueB. False

30. IGS cable is factory assembly of one or more conductors, each individually insulated and enclosed in a loose-fit, nonmetallic flexible conduit as an integrated gas spacer cable rated _______________.

A. 0-600 VoltsB. 0-150 VoltsC. 0-10,000 VoltsD. 1,000-15,000 Volts

31. The 125V, battery back-up smoke detector circuit for the bedroom of a single family dwelling shall be protected by an AFCI.

A. TrueB. False

32. Transformers of more than _______ rating shall be installed in a transformer room of fire-resistant construction.

A. 50 KVAB. 75KVAC. 100.5KVAD. 112.5KVA


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33. Plaster, drywall, or plasterboard surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than ________ at the edge of a box or fitting.

A. 1 mmB. 2 mmC. 3 mmD. 5 mm

34. _________ is a type of multi-conductor cable permitted for use as an underground service-entrance cable.

A. SEB. NMBC. NMSD. USE

35. What is the minimum demand load for five 5 kw cook tops, two 4 kw wall mounted ovens and four 7 kw wall mounted ovens in a multifamily dwelling? Use all options available to determine the minimum.

A. 31 kWB. 20 kWC. 17 kWD. 10 kW

36. Fixed electric space-heating equipment requiring supply conductors with an insulation rated over _____ shall be clearly and permanently marked.

A. 90 CB. 50 CC. 60 CD. 75 C

37. On fixed stage equipment, portable or strip luminaries and connector strips shall be wired with conductors having an insulation rating suitable for the temperature but not less than _______.

A. 75 CB. 90 CC. 100 CD. 125 C


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38. What is the minimum sized THHN conductor that can be used to feed the following (5) non-motor generator arc welders? 50A @ 60 Duty Cycle, 60A @ 30 Duty Cycle, 100A @ 10 Duty Cycle, and two welders that are rated at 50A I1eff @ 40 Duty Cycle. The welders and overcurrent protection are all rated at 75 degrees Celsius.

A. 2/0 AWGB. 3/0 AWGC. 1/0 AWGD. 4/0 AWG

39. A fuel cell system shall be evaluated and _________ for its intended application prior to installation.

A. ApproveB. MarkedC. Labeled D. Listed

40. All 120V, 15 and 20 ampere rated receptacles in a dwelling unit shall be tamper resistant type.

A. TrueB. False

41. Can type MC cable be used to feed a luminaire rated over 600 volts that is installed in a highway tunnel?

A. TrueB. False

42. The minimum sized service-drop conductor permitted by the Code is _________ AWG aluminum or copper clad aluminum.

A. 1/0 and 2/0B. 4 and 2C. 8 and 6D. 12 and 10


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43. The outer sheath of MI cable is made of __________.A. AluminumB. Steel AlloyC. Copper D. Either Steel Alloy or Copper

44. Service conductors that are not encased in concrete and buried 18 inches or more below grade shall have their location identified by a warning ribbon placed in the trench at least _________ above the underground installation.


45. THHN circuit conductors that operate at 277V may not occupy the same enclosure or raceway containing conductors that operate at 48V dc that have a 300V insulation rating.

A. TrueB. False

46. The patient care area is any portion of a health care facility, including the business offices, corridors, lounges, day rooms, dining rooms or similar areas.

A. TrueB. False

47. An outdoor luminaire may be mounted on a tree providing it is no larger than 16 inches in diameter.

A. TrueB. False


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48. An intentionally constructed, permanent, low-impedance electrically conductive path designed and intended to carry current under-fault conditions from the point of a ground fault on a wiring system to the electrical supply source is a definition of ___________________.

A. Effective ground fault return pathB. Electrically grounded systemC. Electrically bonded systemD. None of the above

49. What is the maximum time period that decorative lighting used for Halloween may be installed and used?

A. 30 daysB. 60 daysC. 90 daysD. No limit, only Christmas Decorations are limited.

50. In non-residential use, what is the maximum overcurrent protection for 2 AWG RHW aluminum conductors with an ambient temperature of 88 degrees F?

A. 80 amperesB. 90 amperesC. 100 amperesD. 110 amperes

51. The minimum clearance from clothes closet storage space to the outside edge of a recessed, uncovered, fluorescent fixture in a closet is _________.


52. All fluorescent luminaires installed in a dwelling unit shall have a disconnecting means either in the fixture or adjacent to the fixture.

A. TrueB. False


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53. When installing multi-conductor cables in EMT, the fill capacity shall not exceed the allowable percentage of fill specified in _________.

A. Table 4B. Table 5C. Table 8D. None of these

54. In general, the neutral of a solidly grounded neutral system shall be permitted to be grounded at more than one point.

A. TrueB. False

55. What is the total cooking equipment demand on the main service entrance for a single-family dwelling that is equipped with a single 2.1 kw cook top and one 4.9 kw wall-mounted oven and one 4.8 kw wall-mounted oven?

A. 9257 vaB. 10,330 vaC. 7985 vaD. 11,800 va

56. A single family dwelling must have at least _________ 20 ampere branch circuits.

A. 2B. 3C. 4D. 5

57. An unattended self-service gasoline station is required to have two emergency disconnects, what is the maximum distance from the dispenser that one of the disconnects may be located.

A. 20 feetB. 40 feetC. 50 feetD. 100 feet


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58. What is the recommended sized overload for a 10hp, single-phase AC motor operating on a 208V circuit? The nameplate rating of the motor is 51.6 amps. The motor has a marked service factor of 1.15.

A. 25 amperesB. 40 amperesC. 59.34 amperesD. 64.5 amperes

59. What is the net computed load for the lighting and receptacle circuits for a dwelling unit that is 200 square meters and has one kitchen?

A. 2835 VAB. 5835 VAC. 6600 VAD. 11100 VA

60. Which of the following functions shall not be connected to the life safety branch circuits in a hospital _________.

A. Illumination of EgressB. Admin Office LightingC. Exit SignsD. Alarm and Alerting Systems

61. Motor control circuit devices with screw-type pressure terminals used for 14 AWG or smaller copper conductors shall be torqued to minimum of _________ inch pounds.

A. 1B. .8C. 5D. 7


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62. What is the minimum number of 15A, 120V circuits required for the lighting and receptacle circuits in a single family dwelling that is fed with a 240V/120V service? The single-family dwelling has 1,890 square feet of habitable space.

A. 8B. 7C. 4D. 3

63. Exposed vertical risers of rigid metallic conduit from fixed equipment in other than dwelling units shall be permitted to be supported at intervals not exceeding ______ meters, if the conduit is made up of threaded couplings, the conduit is firmly supported at the top and bottom of the riser, an no other means of intermediate support is readily available.

A. 2B. 6C. 10D. 20

64. The radius of a bend made in liquidtight flexible metal conduit shall be measured to the ________ conduit.

A. Leading EdgeB. Lagging EdgeC. CenterlineD. None of these

65. In general, when installing a motor in one location and the motor controller in another location that are not within sight of each other, the minimum number of disconnecting means required is ___________.

A. OneB. TwoC. ThreeD. Four


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66. A ballast in a fluorescent exit luminaire fixture _________ be required to be thermally protected.

A. ShallB. Shall not

67. A replacement snap switch is located within reach of earth ground and is not grounded with an equipment-grounding conductor and no means of grounding exists within the snap switch enclosure. In this situation, the snap switch must be equipped with a ________.

A. Metal FaceplateB. Non-metallic attachment screwsC. Non-conductive FaceplateD. Both B and C

68. All 120V outlets in a dwelling unit except those installed in garages, outdoors, bathrooms and kitchen counter tops shall be provided with arc fault interrupter protection of the combination type for the branch circuits supplying the outlets.

A. TrueB. False

69. What is the minimum size type SO cord required to feed a 40hp, 460 volt, three-phase, AC, wound rotor motor in an ambient temperature of 86 degrees F? The motor has a nameplate rating of 44.6A FLC.

A. 2 AWGB. 4 AWGC. 6 AWGD. 8 AWG

70. What is the minimum cooking equipment demand on the service entrance for a range in a single family dwelling that is rated at 16.9 kw?

A. 25.35 kwB. 16.9 kwC. 10 kwD. 8.5 kw


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71. The identification of circuits in the directory of a panelboard shall be such that each circuit is _______________ identified.

A. AccuratelyB. uniquelyC. positivelyD. negatively

72. A panel board equipped with snap switches rated 20 amperes, 30 amperes and 40 amperes has an overcurrent protection in the form of a 250 ampere main breaker. Is this installation legal?

A. YesB. No

73. What is the minimum required size copper equipment grounding conductor for a 15 ampere feeder installed in polyvinyl chloride conduit that supplies swimming pool service equipment?


74. At least one entrance not less than 24 inches wide and 6.5 feet high shall be provided to give access to the working space about the electric equipment. Where the entrance has personnel doors, the doors shall _____________. The equipment is rated 800A. The personnel door is located within 25 of the equipment.

A. Remain locked when not in useB. Remain sealed when under maintenanceC. Remain open when occupiedD. Open in the direction of egress

75. What is the minimum size common grounding electrode copper conductor needed to run through a building to four, 480V to 208/120 V, three-phase transformers? Each transformer has 3/0 AWG copper secondary phase conductor.

A. 4 AWGB. 2 AWGC. 3/0 AWGD. 2/0 AWG


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76. What is the minimum ampacity for a feeder conductor for (5) squirrel cage motors that are three phase, 208V, design B, continuous duty rated and each motor has a nameplate rating of 26.2 A FLC and 10 HP?

A. 138AB. 50AC. 162AD. 101A

77. # 12 AWG, THHN conductors installed in EMT which passes over a ceiling that contains electric radiant heating panes and having a clearance of 3 inches from the heating panels shall have their ampacity reduced to ________. There is thermal insulation installed in the ceiling that is 1 inch thick.

A. 30 ampsB. 27.3 ampsC. 24.6 ampsD. 23.2 amps

78. The emergency controls for attended self-service stations shall be located no more than ______ from the gasoline dispensers.


79. It is permissible to supply a mobile home that is factory-equipped with gas or oil-fired central heating equipment and cooking appliances with a listed mobile home power-supply cord rated ________.

A. 25 ampB. 30 ampC. 40 ampD. 50 amp


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80. The ampacity requirements for a disconnecting means for x-ray equipment shall be based on the greater of _____ percent of the input required for the momentary rating or 100 percent of the input required for the long-time rating.

A. 25B. 50C. 80D. 125

81. An irrigation machine may have hand-portable motors.A. TrueB. False

82. What is the minimum size copper equipment grounding conductor required for a 400 ampere branch circuit? The ungrounded conductors are sized using an adjusted value from the 90 C column of Table 310.16. The ungrounded conductors were then up-sized from 500 kcmil to 750 kcmil.

A. 3 AWGB. 2 AWGC. 1 AWGD. 1/0 AWG

83. The voltage at the line terminals of a fire-pump motor controller (controller rated voltage) shall not drop more than ____ percent below normal (controller-rated voltage) under motor-starting conditions.

A. 10B. 15C. 25D. 50


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84. What is the maximum-sized separate overload device that can be used to protect a 480V, 20 hp, three-phase induction motor? The motor has a nameplate full-load current of 22.8 A and a marked service factor of 1.12. Assume the motor will experience no problems with start-up after the overloads are installed.

A. 30 amperesB. 26.22 amperesC. 20.22 amperesD. 15 amperes

85. In general, an equipment bonding jumper installed on the outside of a raceway may not exceed ________.


86. The grounding conductor for a coaxial cable protector shall be ________ if it is used as part of a community antenna TV distribution.

A. Long as possibleB. 3 feetC. 7 feetD. Short as possible

87. When a portable generator is used for portable optional standby source and is not considered a separately derived system, what shall the equipment-grounding conductor be bonded to ?

A. Generator frame and the grounded conductorB. A grounding electrode onlyC. The system grounding electrodeD. The grounded conductor


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88. Service entrance conductors shall be considered outside the building if they are installed in conduit and covered with at least _________mm of earth.

A. 100B. 250C. 450D. 600

89. Automatically operated doors used for building egress in a hospital shall be supplied from the ____________.

A. Equipment BranchB. Critical BranchC. Life Safety BranchD. None of these

90. What is the minimum size equipment ground for a 5 hp, 3 phase, 208V motor with 20 ampere overload protection and 30 ampere duel element time delay fuse short circuit protection?


91. How many grounded conductors may terminate in the same lug in a panel board if the grounded conductors are not a part of a parallel run.

A. 1B. 2C. 3D. 4

92. What is the ampacity rating of each copper conductor when installing five 10/2 with ground MC cables bundled together for a length of four feet? Assume everything in the circuit is rated at 90 degrees Centigrade.

A. 17.5 amperesB. 20 amperesC. 30 amperesD. 35 amperes


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93. Fire Pump power circuits shall not have automatic protection from _________________.

A. overcurrentsB. short circuitsC. ground faultsD. overloads

94. What is the maximum size solid ungrounded conductor that may be installed in a raceway?


95. A three-phase 480V to 208/120V transformer is configured delta-wye. The secondary line current on the transformer is 178.6 amperes. What is the secondary phase current?

A. 103.12 amperesB. 178.6 amperesC. 25.78 amperesD. 44.65 amperes

96. A three-phase 480V to 208/120V transformer is configured delta-wye. The secondary line current on the transformer is 56.9 amperes. What is the primary line current?

A. 98.55 amperesB. 56.9 amperesC. 24.64 amperesD. 14.23 amperes

97. A circuit that has a total resistance of 57 ohms and a current of 9 amps will produce a power of _________ watts.

A. 2941B. 4617C. 513D. 6.33


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98. What is the line to line voltage drop on 480 volt, three-phase AC system? The circuit conductors are 3/0 copper and are installed underground in schedule 80 rigid nonmetallic conduit. The circuit length is 116 meters one direction. The circuit has a full load current of 116.9 amperes.

A. 5.67 voltsB. 7.84 voltsC. 13.58 voltsD. 6.84 volts

99. What is the minimum sized grounding electrode conductor (copper) that can be used for a 480V, 3 phase service rated at 400 amperes? The service conductors are 250 kcmil Copper.

A. 3/0B. 1/0C. 1D. 2

100. What is the minimum sized rigid metal conduit that can be used for a 12 inch long nipple between two panels if the conduit will contain the following conductors: (3) 1/0 AWG RHW without outer covering, (15) 12 AWG THHN, and (7) 6 AWG THW.

A. 1 inchB. 1.5 inchC. 2 inchD. 3 inch


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E4-2 Mock Journeyman’s Exam – 2008 NEC · Web viewBonded Grounded Green Service conductors...

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