1. Smitty’s Two Minute Drill Varied Number 7
© Ted Smith 2017
Electrical Experts Consulting

2. Click on the slide to start the timer and begin the test
Be sure to place this presentation in Slide Show Mode if it is not already in that mode before proceeding
The purpose of this drill is to help you improve your skill at finding answers to questions using the applicable fire codes and also to help increase your knowledge of the Fire Alarm codes.
Each slide will contain a question. The question will remain in the screen for a period of 2 minutes then a notification will sound and the slide will transition to the next slide with the answer. After 15 seconds the next question will appear.
During the test do not worry about the correct answers when those slide appear. You will be given an opportunity to review the answers with out the time at the end of the test.
Click on the slide to start the timer and begin the test
Instructions

3. This drill is based on your ability to find things quickly in the National Electric Code and your ability to understand the code requirements.
Be sure to use the Targeting method to find things quickly.
Be sure to the have the Chapter Titles of the NEC chapters memorized as this will speed you up.
NOTE

4. Chapters 1-4 of the NEC are the National Electric Code and the requirements found there apply to all occupancies and installations.
Chapters 5-7 Modify and Amend the Requirements found in Chapters 1-4 of the NEC
Chapter 8 is a Code within a Code and only those things specifically cited in Chapter 8 from Chapters 1-4 apply to things in Chapter 8
REMEMBER 90.3

5. REMEMBER
90.3 Lists the Chapter Titles of all the Chapters and also the Code Arrangement
Understanding this and having it memorized will increase your code look up abilities.
Also, use this in conjunction with the Table of Contents and the Parts of Large Articles.

6. NEC
1. Solar photovoltaic system DC circuit on or in one and two family dwellings shall be permitted to have a maximum voltage of ____________ or less.
125 volts
250 volts
300 volts
600 volts

7. Answer D
690.7

8. NEC
2. What is the minimum height allowed for a fence enclosing an outdoor installation of 2,400 volt electrical equipment?
500 kW
5 kW
0.50 kW
50 kW

9. Answer B.
110.31

10. NEC
3. Where power for equipment is directly associated with the radio frequency distribution system is carried by the coaxial cable, and the power source is a power limiting transformer, what is the maximum voltage this coaxial cable may carry?
50 volts
60 volts
120 volts
150 volts

11. Answer B.
820.15

12. NEC
4. Where a 15 ampere rated general use ac snap switch is used as a disconnecting means for an ac motor, the NEC requires the maximum full load current of the motor be no more than ______________.
7.5 amperes
10 amperes
12 amperes
15 amperes

13. Answer C.
(C)(2)

14. NEC
5. Determine the maximum number of 125 volt, general purpose receptacles the NEC permits to be protected by a 20 ampere, 120 Volt, single pole inverse time circuit breaker in a commercial occupancy. 18 15 13 10

15. Answer C
220.14(I)
120V x 20A=2400 VA/180VA=13

16. NEC
6. Which of the following statements, if any, are true regarding illumination for service equipment installed in electrical equipment rooms?
The illumination shall not be controlled by means of three way switches
The illumination shall not be controlled by automatic means only.
I only
II only
Both I and II
Neither I or II

17. Answer B
110.26(D)

18. NEC
7. In regard to the tenant spaces in a retail shopping mall; each occupant shall have access to the main disconnecting means, EXCEPT:
Where the service and maintenance are provided by the building management
Where there are more than six disconnecting means provided
Where the primary feeder transformer does not exceed 600 volts
Where the secondary of the service transformer does not exceed 240 volts to ground

19. Answer A
240.24(B)(1)

20. NEC A. 160 amperes B. 167 amperes C. 200 amperes D. 209 amperes
8. Determine the conductor allowable ampacity given the following conditions:
-Ambient temperature of 44 deg. C
-250 kcmil THWN copper conductor
-Four current carrying conductors in the raceway
-Length of the raceway is 25 feet
A. 160 amperes
B. 167 amperes
C. 200 amperes
D. 209 amperes

21. 310.15(B)(2) T310.15(B)(16),T310.15(B)(2)(a),T310.15(B)(3)(a)
Answer B
310.15(B)(2) T310.15(B)(16),T310.15(B)(2)(a),T310.15(B)(3)(a)
Size 250 kcmil THWN copper ampacity before derating- 255 amperes. 255 x .82 x .8= amperes

22. NEC
9. Determine the maximum overcurrent protection permitted for size 14 THWN copper motor control circuit conductors tapped from the load side of a motor overcurrent protection device. Assume the conductors require short circuit protection and do not extend beyond the motor control enclosure.
20 amperes
25 amperes
30 amperes
100 amperes

23. Answer D
T430.72(B)

24. NEC
10. Circuit breakers rated ____________ or less and 1000 volts or less shall have the ampere rating molded, stamped, etched or similarly marked into their handles or escutcheon areas.
600 amperes
200 amperes
400 amperes
100 amperes

25. Answer D
240.83(B)

26. NEC
11. In the kitchen of a dwelling unit where a single phase, 125 volt, 15 0r 20 ampere rated receptacle outlet is installed for a refrigerator and is located within 6 feet from the top inside edge of the bowl of the kitchen sink, the receptacle outlet shall be provided with ____________.
GFCI protection only
AFCI protection only
Both GFCI and AFCI protection
Neither GFCI or AFCI protection

27. Answer C
210.8(A)(7), (A)

28. NEC
12. Where a rooftop mounted air-conditioning unit is supplied with three (3) size 8 AWG THHN copper conductors, enclosed in an electrical metallic tubing within three (3) inches of the rooftop, and exposed to direct sunlight and an ambient temperature of 100 degrees F, the allowable ampacity of the conductors is _____________.
50 amperes
44 amperes
29 amperes
25 amperes

29. 310.15(B)(2),T310.15(B)(2)(a),T310.15(B)(16)
Answer B
310.15(B)(2),T310.15(B)(2)(a),T310.15(B)(16)
Outdoor ambient temperature= 100 deg. F. A temperature correction factor of .88 applied. Size 8 AWG THWN ampacity= 50 amps x .88= 44 amperes

30. NEC
13. Which of the following listed conductor insulations is oil resistant? TW
TFE
THWN
MTW

31. Answer D
T (A)

32. NEC
14. All exposed non-current-carrying metal parts of an information technology system shall ___________ or shall be double insulated.
Be bonded to the equipment grounding conductor
Not be bonded to the equipment grounding conductor
Be bonded to the grounded conductor
Be isolated

33. Answer A
645.15

34. NEC
15. Determine the minimum number of 15 ampere, 120 volt general purpose lighting branch circuits required for a 12,000 square foot multifamily condo where each dwelling unit has cooking facilities provided. 15 20 24 30

35. Answer T220.12 12000 x 3=36000 VA, 120 volts x 15= 1800 VA B
36000/1800= 20

36. NEC
16. Storage batteries used as a source of power for emergency systems shall be of a suitable rating and capacity to supply and maintain the total load for at least ________________.
½ hour
1 hour
1 ½ hours
2 hours

37. Answer C
700.12(A)

38. NEC
17. When a conduit containing service-entrance conductors runs beneath a building, what is the minimum depth of concrete required to cover the conduit for it to be considered “outside” the building?
2 inches
6 inches
12 inches
18 inches

39. Answer A
230.6(1)

40. NEC
18. The entire are of an aircraft hanger, including any adjacent and communicating areas not suitably cut off from the hangar, shall be classified as Class I, Division 2 or Zone 2 location up to a level ________________ above the floor.
12 inches
18 inches
24 inches
30 inches

41. Answer B
513.3(B)

42. NEC
19. Where 240 volt, single phase 90 ampere load is located 225 feet from a panelboard and supplied with size 3 THWN copper conductors; what is the approximate voltage drop on this circuit?
6 volts
4 volts
8 volts
10 volts

43. Answer D
Chapter 9, Table 8
VD=2KDI/CM
2x 12.9x 90x 225/56620= 9.92

44. NEC
20. The continuity of the equipment grounding conductor system for portable electrical carnival equipment shall be verified ____________.
And recorded on an annual basis
And recorded on a quarterly basis
An recorded on a monthly basis
Each time the equipment is connected

45. Answer D
525.32

46. END of QUIZ. THE TIME WILL STOP NOW
END of QUIZ. THE TIME WILL STOP NOW. PLEASE CLICK ON THE SLIDE TO CONTINUE WITHOUT THE TIMER AND REVIEW EACH QUESTION.

47. NEC
1. Solar photovoltaic system DC circuit on or in one and two family dwellings shall be permitted to have a maximum voltage of ____________ or less.
125 volts
250 volts
300 volts
600 volts

48. Answer D
690.7

49. NEC
2. What is the minimum height allowed for a fence enclosing an outdoor installation of 2,400 volt electrical equipment?
500 kW
5 kW
0.50 kW
50 kW

50. Answer B.
110.31

51. NEC
3. Where power for equipment is directly associated with the radio frequency distribution system is carried by the coaxial cable, and the power source is a power limiting transformer, what is the maximum voltage this coaxial cable may carry?
50 volts
60 volts
120 volts
150 volts

52. Answer B.
820.15

53. NEC
4. Where a 15 ampere rated general use ac snap switch is used as a disconnecting means for an ac motor, the NEC requires the maximum full load current of the motor be no more than ______________.
7.5 amperes
10 amperes
12 amperes
15 amperes

54. Answer C.
(C)(2)

55. NEC
5. Determine the maximum number of 125 volt, general purpose receptacles the NEC permits to be protected by a 20 ampere, 120 Volt, single pole inverse time circuit breaker in a commercial occupancy. 18 15 13 10

56. Answer C
220.14(I)
120V x 20A=2400 VA/180VA=13

57. NEC
6. Which of the following statements, if any, are true regarding illumination for service equipment installed in electrical equipment rooms?
The illumination shall not be controlled by means of three way switches
The illumination shall not be controlled by automatic means only.
I only
II only
Both I and II
Neither I or II

58. Answer B
110.26(D)

59. NEC
7. In regard to the tenant spaces in a retail shopping mall; each occupant shall have access to the main disconnecting means, EXCEPT:
Where the service and maintenance are provided by the building management
Where there are more than six disconnecting means provided
Where the primary feeder transformer does not exceed 600 volts
Where the secondary of the service transformer does not exceed 240 volts to ground

60. Answer A
240.24(B)(1)

61. NEC A. 160 amperes B. 167 amperes C. 200 amperes D. 209 amperes
8. Determine the conductor allowable ampacity given the following conditions:
-Ambient temperature of 44 deg. C
-250 kcmil THWN copper conductor
-Four current carrying conductors in the raceway
-Length of the raceway is 25 feet
A. 160 amperes
B. 167 amperes
C. 200 amperes
D. 209 amperes

62. 310.15(B)(2) T310.15(B)(16),T310.15(B)(2)(a),T310.15(B)(3)(a)
Answer B
310.15(B)(2) T310.15(B)(16),T310.15(B)(2)(a),T310.15(B)(3)(a)
Size 250 kcmil THWN copper ampacity before derating- 255 amperes. 255 x .82 x .8= amperes

63. NEC
9. Determine the maximum overcurrent protection permitted for size 14 THWN copper motor control circuit conductors tapped from the load side of a motor overcurrent protection device. Assume the conductors require short circuit protection and do not extend beyond the motor control enclosure.
20 amperes
25 amperes
30 amperes
100 amperes

64. Answer D
T430.72(B)

65. NEC
10. Circuit breakers rated ____________ or less and 1000 volts or less shall have the ampere rating molded, stamped, etched or similarly marked into their handles or escutcheon areas.
600 amperes
200 amperes
400 amperes
100 amperes

66. Answer D
240.83(B)

67. NEC
11. In the kitchen of a dwelling unit where a single phase, 125 volt, 15 0r 20 ampere rated receptacle outlet is installed for a refrigerator and is located within 6 feet from the top inside edge of the bowl of the kitchen sink, the receptacle outlet shall be provided with ____________.
GFCI protection only
AFCI protection only
Both GFCI and AFCI protection
Neither GFCI or AFCI protection

68. Answer C
210.8(A)(7), (A)

69. NEC
12. Where a rooftop mounted air-conditioning unit is supplied with three (3) size 8 AWG THHN copper conductors, enclosed in an electrical metallic tubing within three (3) inches of the rooftop, and exposed to direct sunlight and an ambient temperature of 100 degrees F, the allowable ampacity of the conductors is _____________.
50 amperes
44 amperes
29 amperes
25 amperes

70. 310.15(B)(2),T310.15(B)(2)(a),T310.15(B)(16)
Answer B
310.15(B)(2),T310.15(B)(2)(a),T310.15(B)(16)
Outdoor ambient temperature= 100 deg. F. A temperature correction factor of .88 applied. Size 8 AWG THWN ampacity= 50 amps x .88= 44 amperes

71. NEC
13. Which of the following listed conductor insulations is oil resistant? TW
TFE
THWN
MTW

72. Answer D
T (A)

73. NEC
14. All exposed non-current-carrying metal parts of an information technology system shall ___________ or shall be double insulated.
Be bonded to the equipment grounding conductor
Not be bonded to the equipment grounding conductor
Be bonded to the grounded conductor
Be isolated

74. Answer A
645.15

75. NEC
15. Determine the minimum number of 15 ampere, 120 volt general purpose lighting branch circuits required for a 12,000 square foot multifamily condo where each dwelling unit has cooking facilities provided. 15 20 24 30

76. Answer T220.12 12000 x 3=36000 VA, 120 volts x 15= 1800 VA B
36000/1800= 20

77. NEC
16. Storage batteries used as a source of power for emergency systems shall be of a suitable rating and capacity to supply and maintain the total load for at least ________________.
½ hour
1 hour
1 ½ hours
2 hours

78. Answer C
700.12(A)

79. NEC
17. When a conduit containing service-entrance conductors runs beneath a building, what is the minimum depth of concrete required to cover the conduit for it to be considered “outside” the building?
2 inches
6 inches
12 inches
18 inches

80. Answer A
230.6(1)

81. NEC
18. The entire are of an aircraft hanger, including any adjacent and communicating areas not suitably cut off from the hangar, shall be classified as Class I, Division 2 or Zone 2 location up to a level ________________ above the floor.
12 inches
18 inches
24 inches
30 inches

82. Answer B
513.3(B)

83. NEC
19. Where 240 volt, single phase 90 ampere load is located 225 feet from a panelboard and supplied with size 3 THWN copper conductors; what is the approximate voltage drop on this circuit?
6 volts
4 volts
8 volts
10 volts

84. Answer D
Chapter 9, Table 8
VD=2KDI/CM
2x 12.9x 90x 225/56620= 9.92

85. NEC
20. The continuity of the equipment grounding conductor system for portable electrical carnival equipment shall be verified ____________.
And recorded on an annual basis
And recorded on a quarterly basis
An recorded on a monthly basis
Each time the equipment is connected

86. Answer D
525.32