CME Advanced Load Calculations 2

Question 1

A 3,600 sq ft dwelling has a 12 kW range. Using the NEC Table 220.55 demand factor, what is the demand load for the range?

Accepted Answer

8,400 W

Answer

8,000 W

Answer

10,800 W

Answer

12,000 W

Question 2

When calculating the demand load for electric dryers in a multi-family building with 25 units, which NEC table applies?

Accepted Answer

Table 220.54

Answer

Table 220.42

Answer

Table 220.55

Answer

Table 220.61

Question 3

A commercial building has a 200 kVA transformer supplying a 208Y/120V panel. What is the maximum continuous load in amps at 208V three-phase?

Accepted Answer

555 A

Answer

480 A

Answer

960 A

Answer

1,108 A

Question 4

Per NEC 220.82, the optional calculation method for dwelling units applies when the service or feeder does NOT exceed:

Accepted Answer

200 amperes

Answer

100 amperes

Answer

150 amperes

Answer

400 amperes

Question 5

A 480V, 3-phase motor has a nameplate full-load current of 40 A. What minimum feeder ampacity is required per NEC 430.22 for a single motor?

Accepted Answer

50 A

Answer

40 A

Answer

44 A

Answer

52 A

Question 6

For a school building, NEC 220.14(H) specifies the unit load per outlet for receptacle outlets in general-use spaces as:

Accepted Answer

180 VA per outlet

Answer

90 VA per outlet

Answer

120 VA per outlet

Answer

150 VA per outlet

Question 7

A 10,000 sq ft office building requires general lighting load calculation. Per NEC Table 220.12, the unit load for office occupancy is:

Accepted Answer

2.0 VA/sq ft

Answer

1.0 VA/sq ft

Answer

3.5 VA/sq ft

Answer

5.0 VA/sq ft