TAP Services

1. The interior lighting load for a school building with 175,000 square feet of floor space is ________.

525,000VA

700,000VA

175,000VA

350,000VA

Question 1 of 30

2.

Refer to the figure above. What is the total load a feeder serving four 2hp motors, three 5hp motors, one 15hp motor, and one 25hp motor? All motors are 208V.

50A

219.8A

145.2A

201.1A

Question 2 of 30

3. Residential small appliance circuits must be rated at ________.

1,200VA

2,400VA

1,500VA

1,920VA

Question 3 of 30

4. Before it is considered a continuous load, a load must operate for at least how many hours without interruption?

24

10

3

12

Question 4 of 30

5. The allowable ampacity of a conductor run in a raceway with four to six conductors must be reduced by ________.

50%

80%

60%

75%

Question 5 of 30

6. Which part of a residential lighting and small appliance load must be rated at 35% for service calculations?

The next 117,000VA

The next 125,000VA

The first 500VA

The first 1,00VA

Question 6 of 30

7. If the number of current-carrying conductors in a conduit exceed three, the ampacity of the conductors must be adjusting using ________.

NEC® Table 310.15(C)(1)

NEC® Table 310.16

NEC® Table 220.3

NEC® Table 310.15(B)(16)

Question 7 of 30

8. The smallest size locking and grounding type receptacle that may be used to provide shore power for boats is ________.

20A

30A

15A

25A

Question 8 of 30

9. When calculating the service requirement for a particular building, the first step is to ________.

calculate the total motor load

determine the floor area of the building

determine all continuous loads

apply any demand factors

Question 9 of 30

10. When the overcurrent protection for a conductor is located on the load end rather than the supply side of a conductor it is considered to be a(n) ________.

tap conductor

unprotected conductor

grounding electrode

drain wire

Question 10 of 30

11.

Refer to the figure above. What is the total load of a feeder serving four 230V motors rated 5hp, 15hp, 20hp, and 40hp?

215.2

241.2

80A

90A

Question 11 of 30

12. The rules governing the design of circuits supplying power to boats is covered in ________.

NEC® Article 220, Part V

NEC® Article 215

NEC® Article 555

NEC® Article 550

Question 12 of 30

13. An optional method for determining feeder to schools is covered in ________.

NEC® Section 220.86

NEC® Article 555

NEC® Section 220.102

NEC® Table 220.88

Question 13 of 30

14. Feeder conductor size is adjusted when ________.

the ambient temperature that the conductors will pass through is more than 30∘C (86°F.

there is a 2% voltage drop

there are more than three current-carrying conductors in the raceway

the load to be supplied is a noncontinuous duty load

Question 14 of 30

15. What is the adjusted ampacity for each of six No. 4/0 THHN copper current-carrying conductors in a single conduit (given: the ampacity of 4/0 THHN is 260A)?

260A

42A

120A

208A

Question 15 of 30

16. The minimum ampacity for a feeder supplying ten 30A shore power receptacles in a marina is ________.

30A

120A

240A

300A

Question 16 of 30

17. What is the load center length for a tapped feeder with loads of 120A at 50', 110A at 60', 75A at 90', and 70A at 150'?

75.15'

81.24'

79.60'

72.75'

Question 17 of 30

18. What is the load for 40 non-dwelling unit receptacles (assume that the load is not continuous)?

7,200VA

7,000VA

6,750VA

5,400VA

Question 18 of 30

19. The minimum service rating for a residential service is ________.

30A

60A

100A

125A

Question 19 of 30

20. When performing load calculations for farm buildings, the load that must be included in the calculation at 100% demand must be at least ________.

60A

240A

120A

30A

Question 20 of 30

21. What is the feeder ampacity for a three -phase, 120/208V subpanel with a connected load of 84,563VA?

235A

407A

294A

200A

Question 21 of 30

22. A farm has three buildings with loads of 85.3A, 55A, and 30A. How many amps of this load will be subject to a 50% demand factor?

60A

85A

55A

80.3A

Question 22 of 30

23. Use of the 100' tap rule is limited to installation in high-bay manufacturing buildings with wall heights over ________.

40 feet

20 feet

35 feet

15 feet

Question 23 of 30

24. If a store lighting load is 14,000VA (continuous), which of the following must be used for the circuit calculation?

17,500VA

15,750VA

20,000VA

19,250VA

Question 24 of 30

25. A farm has three buildings with loads of 82A, 65A and 15A. What is the total load? Assume that there are no dwellings or motors.

82A

162A

117A

129.6A

Question 25 of 30

26. Which of the following lighting loads would be used in a residence that is 1,650 sq ft?

4,950VA

5,150VA

5,900VA

4,225VA

Question 26 of 30

27. If a continuous connected load totals 120A, what is the minimum current-carrying capacity required for the feeder?

150A

154A

170A

182A

Question 27 of 30

28. Using the VA/linear foot method, the total VA that must be used in a service calculation for a 50' show window is ________.

14,500VA

12,500VA

10,750VA

17,750VA

Question 28 of 30

29.

Refer to the figure above. Calculate the minimum ampacity for a feeder serving the following 460V motors: 10hp, 20hp, and 30hp.

115.25A

75A

101.25A

91A

Question 29 of 30

30. What is the demand factor allowed by the NEC® for calculating the neutral conductor size for an electric range load?

80%

125%

100%

70%

Question 30 of 30

Mailing List

Quick Nav

TAP Services

	FOLLOW US ON SOCIAL MEDIA

TAP Services

Mailing List

Quick Nav

Get Social

TAP Services