FREE NEC Load Calculations Questions and Answers

Question 1

An electrician is calculating the service load for a new 2,100 sq. ft. single-family dwelling.
Using the standard method, what is the calculated load for the general lighting and general-use receptacles before any demand factors are applied?

Accepted Answer

6,300 VA

Answer

4,500 VA

Answer

7,800 VA

Answer

3,000 VA

Question 2

When performing a standard load calculation for a dwelling unit, what is the MINIMUM total volt-ampere load that must be allocated for the small-appliance and laundry branch circuits?

Accepted Answer

4,500 VA

Answer

3,000 VA

Answer

1,500 VA

Answer

6,000 VA

Question 3

Using NEC Table 220.55, what is the calculated demand load for a single 13 kW household electric range for a service calculation?

Accepted Answer

8,400 VA

Answer

13,000 VA

Answer

8,000 VA

Answer

12,000 VA

Question 4

An electrician is calculating the feeder load for a multi-family dwelling with five identical apartments. Each apartment will have one electric clothes dryer with a nameplate rating of 4,800 watts. What is the total calculated demand load for the five dryers?

Accepted Answer

20,000 VA

Answer

24,000 VA

Answer

21,250 VA

Answer

25,000 VA

Question 5

For a standard calculation, which of the following loads are combined together before applying the demand factors from NEC Table 220.42?

Accepted Answer

General lighting, small-appliance circuits, and laundry circuit

Answer

General lighting, fixed appliances, and range load

Answer

Small-appliance circuits, laundry circuit, and HVAC load

Answer

General lighting, dryer load, and water heater load

Question 6

What is the minimum calculated general lighting load for a 12,000 sq. ft. office building before any demand factors are applied?

Accepted Answer

168,000 VA

Answer

36,000 VA

Answer

120,000 VA

Answer

42,000 VA

An electrician is calculating the service load for a new 2,100 sq. ft. single-family dwelling.Using the standard method, what is the calculated load for the general lighting and general-use receptacles before any demand factors are applied?

An electrician is calculating the service load for a new 2,100 sq. ft. single-family dwelling.
Using the standard method, what is the calculated load for the general lighting and general-use receptacles before any demand factors are applied?