E2 Commercial Service Load Calculations 3

Question 1

What is the minimum show window lighting load per linear foot required in commercial load calculations per NEC 220.14(G)?

Accepted Answer

200 VA

Answer

NEC 220.14(G) requires a minimum of 200 VA per linear foot of show window for load calculations.

Question 2

When a commercial building has both electric heating and air conditioning as non-coincident loads, what does NEC 220.60 permit?

Accepted Answer

Use only the larger load and omit the smaller

Answer

NEC 220.60 allows the smaller of two non-coincident loads to be omitted because both will not operate simultaneously.

Question 3

For commercial service calculations involving motor loads, what percentage of the largest motor's full-load current must be added to the total per NEC 220.50?

Accepted Answer

25%

Answer

NEC 220.50 requires 25% of the largest motor's full-load current to be added to feeder and service calculations.

Question 4

Per NEC Table 220.56, what demand factor applies to commercial kitchen equipment when there are only 2 cooking units?

Accepted Answer

100%

Answer

NEC Table 220.56 requires 100% demand factor when a commercial kitchen has only 1 or 2 units of cooking equipment.

Question 5

What minimum load must be calculated for each required commercial sign or outline lighting outlet per NEC 220.14(F)?

Accepted Answer

1,200 VA

Answer

NEC 220.14(F) mandates a minimum 1,200 VA for each required sign or outline lighting outlet in commercial occupancies.

(E2) E2 Commercial Electrical Inspector Practice Test

(E2) E2 Commercial Electrical Inspector Practice Test

E2 Commercial Service Load Calculations 3