Licensed Electrical Contractor Licensed Electrical Contractor Load Calculation and Services Questions and Answers 2

Question 1

When performing a standard load calculation for a single-family dwelling per NEC Article 220, what is the general lighting load allowance per square foot?

Accepted Answer

3 VA per square foot

Answer

2 VA per square foot

Answer

5 VA per square foot

Answer

4 VA per square foot

Question 2

What is the demand factor applied to the first 10 kVA of general lighting and receptacle loads in a dwelling unit calculation?

Accepted Answer

100%

Answer

80%

Answer

75%

Answer

50%

Question 3

A 200-amp residential service uses a split-bus panel. How many main disconnect throws are permitted maximum?

Accepted Answer

6

Answer

4

Answer

2

Answer

8

Question 4

When calculating dryer load for a multifamily dwelling with 15 dryers, what demand factor applies per NEC Table 220.54?

Accepted Answer

47%

Answer

100%

Answer

80%

Answer

35%

Question 5

What minimum service size does the NEC require for a single-family dwelling?

Accepted Answer

100 amperes

Answer

60 amperes

Answer

150 amperes

Answer

200 amperes

Question 6

In a commercial load calculation, what demand factor is applied to the first 12.5 kVA of general lighting for an office building?

Accepted Answer

100%

Answer

80%

Answer

50%

Answer

125%