Licensed Electrical Contractor FREE Licensed Electrical Contractor Code, Theory, and Calculations Questions and Answers 2

Question 1

According to the NEC, what is the maximum allowable voltage drop recommended for branch circuits?

Accepted Answer

3%

Answer

5%

Answer

7%

Answer

10%

Question 2

What is the ampacity of a 3/0 AWG copper conductor with THWN insulation at 75°C?

Accepted Answer

200 amps

Answer

175 amps

Answer

225 amps

Answer

150 amps

Question 3

When calculating commercial kitchen load, what demand factor does the NEC allow for six or more pieces of kitchen equipment?

Accepted Answer

65%

Answer

80%

Answer

50%

Answer

75%

Question 4

What is the minimum burial depth for rigid metal conduit (RMC) under a one-family dwelling driveway?

Accepted Answer

18 inches

Answer

24 inches

Answer

12 inches

Answer

6 inches

Question 5

In a three-phase delta-connected system, what is the voltage between the high leg and the neutral?

Accepted Answer

208 volts

Answer

240 volts

Answer

120 volts

Answer

277 volts

Question 6

What size equipment grounding conductor is required for a circuit protected by a 200-amp overcurrent device?

Accepted Answer

6 AWG copper

Answer

4 AWG copper

Answer

8 AWG copper

Answer

2 AWG copper