Licensed Electrical Contractor Licensed Electrical Contractor Load Calculation and Services Questions and Answers 3

Question 1

When sizing service entrance conductors for a dwelling, what is the minimum ampacity requirement for 200-amp service using copper THWN conductors?

Accepted Answer

200 amperes

Answer

175 amperes

Answer

225 amperes

Answer

250 amperes

Question 2

What continuous load multiplier must be applied when calculating branch circuit and feeder conductor sizing?

Accepted Answer

125%

Answer

100%

Answer

115%

Answer

150%

Question 3

For an optional method dwelling unit calculation per NEC 220.82, what is the base load applied to the first 10 kVA of total connected load?

Accepted Answer

100%

Answer

80%

Answer

40%

Answer

75%

Question 4

When calculating kitchen equipment load for a commercial occupancy with 6 pieces of equipment, what demand factor applies per NEC Table 220.56?

Accepted Answer

65%

Answer

90%

Answer

80%

Answer

100%

Question 5

What is the minimum grounding electrode conductor size required for a 200-amp copper service per NEC Table 250.66?

Accepted Answer

4 AWG copper

Answer

6 AWG copper

Answer

2 AWG copper

Answer

8 AWG copper

Question 6

In a load calculation, what wattage must be included for each small appliance branch circuit required in a dwelling kitchen?

Accepted Answer

1,500 VA

Answer

1,200 VA

Answer

1,800 VA

Answer

2,000 VA