1. 2011 Changes Two Minute Drill
Copyright Ted “Smitty” Smith
2008

2. Instructions
Click on the slide show ICON in the lower left hand corner of this screen to start the slide show.
A question will appear and stay on the screen for 2 minutes. The question will then be replaced with the correct answer and code reference. This process will repeat until you reach a slide with a stop sign. You can then click on the slides and the questions and answers will be repeated without the timer so you can look up the answers or take notes.
Do not worry about writing down the answers until after the timed portion of the program.
Concentrate on finding the answer and improving your speed using the NEC. This drill is focused on changes to the 2011 NEC.
(C) Copyright 2008 Ted "Smitty" Smith

3. 1. Conductors for small motors shall not be smaller than _________ AWG unless otherwise permitted.

4. Answer AWG (G)

5. 2. The maximum voltage of a PV system dc curcuits shall be the highest voltage between any two circuit conductors or any conductor to ground. PV system dc circuits on or in one and two family dwellings shall be permitted to have a maximum voltage of ______________ or less.

6. 2. Answer 600 Volts 690.7

7. 3. Type _________ is listed for use in cabletrays for Class 1 and Class 2 Power Limited circuits.

8. 3. Answer PLTC (E)

9. 4. Cable trays containing conductors rated over 600 volts shall have a permanent, legible warning notice carrying the wording “_________________________________” placed in a readily visible position on all cable trays with spacing of warning notices to exceed 3 m (10 ft).

10. 4. Answer “ DANGER---------HIGH VOLTAGE---------KEEP AWAY” 392.18(H)

11. 5. Bonding jumpers at the service shall be used around __________________, such as reducing washers or oversized, concentric or eccentric knockouts.

12. 5. Answer Impaired connections 250.92(B)

13. 6. What is the ampacity of a 10 AWG THHN copper conductor installed in a raceway with a total of 7 current carrying conductors? The raceway is EMT and it is installed across a rooftop that is subject to direct sunlight. The ambient temperature of the area is 89.7 degrees F. The conduit is installed 9 “ above the rooftop.

14. 6. Answer 40*.70= 28 amperes

15. 7. If a 1 ½” x 4” octagon box contains a stud and a cable clamp, the number of wires must be reduced to ______________ if using 14 AWG conductors.
A. four
B. five
C. six
D. seven

16. 7. Answer B. Five (B)

17. 8. A pull box containing a U- pull that has two 3” schedule 80 PVC conduits entering from the bottom will have a vertical measurement of at least __________________.
A. 21
B. 24
C. 26
D. 30

18. 8. Answer A 21” x 6= = 21”

19. 9. A box containing two 12 THHN grounding conductors and two 12 THW conductors will have a required volume of _________ cubic inches?
A. 4.5
B. 5
C. 6.75
D. 9

20. 9. Answer C. 6.75 cubic inches 314.16(B)

21. 10. A standard sized metal device box that contains two switches, one receptacle, and three 14/2 NM cables with grounds is required to be ______________________.
A. 3”x2” x2 ¼”
B. 3” x 2” x 2 ¾”
C. 3” x 2” x 2”
D. 4” x 2 1/8” x 2 1/8”

22. 10. Answer C 3” x 2” x 2” (B)

23. 11. For feeders operating in excess of 600V several tests must be performed before energization and a test report must be delivered to ____________________ prior to energization.

24. 11. Answer The authority having jurisdiction 225.56(B)

25. 12. Incidental metal parts on central vacuum outlet assemblies such as screws or rivets installed into or on insulating material ______________________ be considered likely to become energized.
A. Shall
B. Shall not

26. 12. Answer B. Shall Not (C)

27. 13. Truck space branch circuit supplied loads shall be considered to be ________________.
A. Non- continuous
B. Non simultaneous
C. Continuous
D. Non coincidental

28. 13. Answer C. Continuous 626.21(D)

29. 14. Ground fault protection of equipment shall be provided for fixed outdoor electric deicing and snow melting equipment.
A. True
B. False

30. 14. Answer A. True

31. 15. Receptacle face plated mounted inside a box having a recess mounted receptacle shall effectively _____________the opening and seat against the mounting surface.

32. 15. Answer Close 406.6

33. 16. A battery powered lighting unit in an anesthetizing location shall be permitted to be wired to the ____________ in the area and connected ahead of any local switches.
A. Equipment branch circuits
B. Critical lighting circuits
C. Life Safety circuits
D. None of the above

34. 16. Answer B. critical lighting circuits 517.63(A)

35. 17. If the source of a separately derived system and the first disconnecting means are located in separate enclosures, a supply side bonding jumper shall be installed with the _____________________ from the source enclosure to the first disconnecting means.

36. 17. Answer Circuit conductors 250.30(A)(2)

37. 18. A 24 VDC control wiring circuit is installed using THHN conductors
18. A 24 VDC control wiring circuit is installed using THHN conductors. It is installed in an EMT along with a 120 VAC power circuit and a 480 VAC, three phase, equipment circuit. All of the conductors for the 120 VAC and 480 VAC circuits are THWN. Is this an acceptable installation?

38. 18. Answer Yes 300.3(C)(1)

39. 19. All switchboards and panelboards supplied by feeders in other than one or two family dwellings shall be marked to indicate the device or equipment ___________________________.

40. 19. Answer Where the power supply originates 408.4(B)

41. 20. A listed ______________________ fitting or other approved means shall be used where a raceway crosses a structural joint intended for expansion, contraction or deflection, used in buildings, bridges, parking garages, or other structures.

42. 20 Answer Expansion/deflection fitting 300.4(H)

43. Click the Mouse Button to Continue to the Untimed Review
Click the Mouse Button to Continue to the Untimed Review. You will need to click each slide to advance to the next slide.

44. 1. Conductors for small motors shall not be smaller than _________ AWG unless otherwise permitted.

45. Answer AWG (G)

46. 2. The maximum voltage of a PV system dc curcuits shall be the highest voltage between any two circuit conductors or any conductor to ground. PV system dc circuits on or in one and two family dwellings shall be permitted to have a maximum voltage of ______________ or less.

47. 2. Answer 600 Volts 690.7

48. 3. Type _________ is listed for use in cabletrays for Class 1 and Class 2 Power Limited circuits.

49. 3. Answer PLTC (E)

50. 4. Cable trays containing conductors rated over 600 volts shall have a permanent, legible warning notice carrying the wording “_________________________________” placed in a readily visible position on all cable trays with spacing of warning notices to exceed 3 m (10 ft).

51. 4. Answer “ DANGER---------HIGH VOLTAGE---------KEEP AWAY” 392.18(H)

52. 5. Bonding jumpers at the service shall be used around __________________, such as reducing washers or oversized, concentric or eccentric knockouts.

53. 5. Answer Impaired connections 250.92(B)

54. 6. What is the ampacity of a 10 AWG THHN copper conductor installed in a raceway with a total of 7 current carrying conductors? The raceway is EMT and it is installed across a rooftop that is subject to direct sunlight. The ambient temperature of the area is 89.7 degrees F. The conduit is installed 9 “ above the rooftop.

55. 6. Answer 40*.70= 28 amperes

56. 7. If a 1 ½” x 4” octagon box contains a stud and a cable clamp, the number of wires must be reduced to ______________ if using 14 AWG conductors.
A. four
B. five
C. six
D. seven

57. 7. Answer B. Five (B)

58. 8. A pull box containing a U- pull that has two 3” schedule 80 PVC conduits entering from the bottom will have a vertical measurement of at least __________________.
A. 21
B. 24
C. 26
D. 30

59. 8. Answer A 21” x 6= = 21”

60. 9. A box containing two 12 THHN grounding conductors and two 12 THW conductors will have a required volume of _________ cubic inches?
A. 4.5
B. 5
C. 6.75
D. 9

61. 9. Answer C. 6.75 cubic inches 314.16(B)

62. 10. A standard sized metal device box that contains two switches, one receptacle, and three 14/2 NM cables with grounds is required to be ______________________.
A. 3”x2” x2 ¼”
B. 3” x 2” x 2 ¾”
C. 3” x 2” x 2”
D. 4” x 2 1/8” x 2 1/8”

63. 10. Answer C 3” x 2” x 2” (B)

64. 11. For feeders operating in excess of 600V several tests must be performed before energization and a test report must be delivered to ____________________ prior to energization.

65. 11. Answer The authority having jurisdiction 225.56(B)

66. 12. Incidental metal parts on central vacuum outlet assemblies such as screws or rivets installed into or on insulating material ______________________ be considered likely to become energized.
A. Shall
B. Shall not

67. 12. Answer B. Shall Not (C)

68. 13. Truck space branch circuit supplied loads shall be considered to be ________________.
A. Non- continuous
B. Non simultaneous
C. Continuous
D. Non coincidental

69. 13. Answer C. Continuous 626.21(D)

70. 14. Ground fault protection of equipment shall be provided for fixed outdoor electric deicing and snow melting equipment.
A. True
B. False

71. 14. Answer A. True

72. 15. Receptacle face plated mounted inside a box having a recess mounted receptacle shall effectively _____________the opening and seat against the mounting surface.

73. 15. Answer Close 406.6

74. 16. A battery powered lighting unit in an anesthetizing location shall be permitted to be wired to the ____________ in the area and connected ahead of any local switches.
A. Equipment branch circuits
B. Critical lighting circuits
C. Life Safety circuits
D. None of the above

75. 16. Answer B. critical lighting circuits 517.63(A)

76. 17. If the source of a separately derived system and the first disconnecting means are located in separate enclosures, a supply side bonding jumper shall be installed with the _____________________ from the source enclosure to the first disconnecting means.

77. 17. Answer Circuit conductors 250.30(A)(2)

78. 18. A 24 VDC control wiring circuit is installed using THHN conductors
18. A 24 VDC control wiring circuit is installed using THHN conductors. It is installed in an EMT along with a 120 VAC power circuit and a 480 VAC, three phase, equipment circuit. All of the conductors for the 120 VAC and 480 VAC circuits are THWN. Is this an acceptable installation?

79. 18. Answer Yes 300.3(C)(1)

80. 19. All switchboards and panelboards supplied by feeders in other than one or two family dwellings shall be marked to indicate the device or equipment ___________________________.

81. 19. Answer Where the power supply originates 408.4(B)

82. 20. A listed ______________________ fitting or other approved means shall be used where a raceway crosses a structural joint intended for expansion, contraction or deflection, used in buildings, bridges, parking garages, or other structures.

83. 20 Answer Expansion/deflection fitting 300.4(H)